CAPE CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner enters Port Canaveral in Florida. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities. The first unpiloted test flight of Orion is scheduled to launch in September 2014 atop a Delta IV Heavy rocket and in 2017 on NASA’s Space Launch System

CAPE CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner glides past the jetties as it enters Port Canaveral in Florida. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities. The first unpiloted test flight of Orion is scheduled to launch in September 2014 atop a Delta IV Heavy rocket and in 2017 on NASA’s Space Launch System rocket. For more information, visit www.nasa.gov/orion. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner is secured to the dock in Port Canaveral in Florida. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities. The first unpiloted test flight of Orion is scheduled to launch in September 2014 atop a Delta IV Heavy rocket and in 2017 on NASA’s Space Launch System rocket. For more information, visit www.nasa.gov/orion. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner glides past the jetties as it enters Port Canaveral in Florida. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities. The first unpiloted test flight of Orion is scheduled to launch in September 2014 atop a Delta IV Heavy rocket and in 2017 on NASA’s Space Launch System rocket. For more information, visit www.nasa.gov/orion. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner prepares to dock in Port Canaveral in Florida. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities. The first unpiloted test flight of Orion is scheduled to launch in September 2014 atop a Delta IV Heavy rocket and in 2017 on NASA’s Space Launch System rocket. For more information, visit www.nasa.gov/orion. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner approaches the mouth of Port Canaveral in Florida. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities. The first unpiloted test flight of Orion is scheduled to launch in September 2014 atop a Delta IV Heavy rocket and in 2017 on NASA’s Space Launch System rocket. For more information, visit www.nasa.gov/orion. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner docks in Port Canaveral in Florida. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities. The first unpiloted test flight of Orion is scheduled to launch in September 2014 atop a Delta IV Heavy rocket and in 2017 on NASA’s Space Launch System rocket. For more information, visit www.nasa.gov/orion. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner is secured to the dock in Port Canaveral in Florida. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities. The first unpiloted test flight of Orion is scheduled to launch in September 2014 atop a Delta IV Heavy rocket and in 2017 on NASA’s Space Launch System rocket. For more information, visit www.nasa.gov/orion. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner nears the dock in Port Canaveral in Florida. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities. The first unpiloted test flight of Orion is scheduled to launch in September 2014 atop a Delta IV Heavy rocket and in 2017 on NASA’s Space Launch System rocket. For more information, visit www.nasa.gov/orion. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner travels through Port Canaveral in Florida. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities. The first unpiloted test flight of Orion is scheduled to launch in September 2014 atop a Delta IV Heavy rocket and in 2017 on NASA’s Space Launch System rocket. For more information, visit www.nasa.gov/orion. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner enters Port Canaveral in Florida. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities. The first unpiloted test flight of Orion is scheduled to launch in September 2014 atop a Delta IV Heavy rocket and in 2017 on NASA’s Space Launch System rocket. For more information, visit www.nasa.gov/orion. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. – The Centaur upper stage sits on its transport trailer inside the Delta Mariner at Port Canaveral as crews prepare to move it from the ship to the Atlas Spaceflight Operations Center, or ASOC, to begin checkout for the launch of the Radiation Belt Storm Probes, or RBSP, mission. Photo credit: NASA/Charisse Nahser

The Delta Mariner arrives at Port Canaveral carrying the Centaur upper stage destined to help launch the Radiation Belt Storm Probes, or RBSP, mission. The upper stage was removed from the ship and taken to the Atlas Spaceflight Operations Center, or ASOC, to begin checkout for the launch. Photo credit: NASA/Charisse Nahser

The Delta Mariner arrives at Port Canaveral carrying the Centaur upper stage destined to help launch the Radiation Belt Storm Probes, or RBSP, mission. The upper stage was removed from the ship and taken to the Atlas Spaceflight Operations Center, or ASOC, to begin checkout for the launch. Photo credit: NASA/Charisse Nahser

CAPE CANAVERAL, Fla. – The Delta Mariner arrives at Port Canaveral carrying the Centaur upper stage destined to help launch the Radiation Belt Storm Probes, or RBSP, mission. The upper stage was removed from the ship and taken to the Atlas Spaceflight Operations Center, or ASOC, to begin checkout for the launch. Photo credit: NASA/Charisse Nahser

CAPE CANAVERAL, Fla. – The Centaur upper stage sits on its transport trailer inside the Delta Mariner at Port Canaveral as crews prepare to move it from the ship to the Atlas Spaceflight Operations Center, or ASOC, to begin checkout for the launch of the Radiation Belt Storm Probes, or RBSP, mission. Photo credit: NASA/Charisse Nahser

CAPE CANAVERAL, Fla. – The Centaur upper stage sits on its transport trailer inside the Delta Mariner at Port Canaveral. The upper stage is destined to help launch the Radiation Belt Storm Probes, or RBSP, mission. It was removed from the ship and taken to the Atlas Spaceflight Operations Center, or ASOC, to begin checkout for the launch. Photo credit: NASA/Charisse Nahser

The United Launch Alliance Delta IV Heavy common booster core arrives aboard the company's Mariner ship and prepared for offload at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

Preparations are underway to offload the United Launch Alliance Delta IV Heavy common booster core from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

Preparations are underway to offload the United Launch Alliance Delta IV Heavy common booster core from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Delta IV Heavy common booster core arrives aboard the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Delta IV Heavy common booster core arrives aboard the company's Mariner ship at Port Canaveral in Florida. Preparations are underway to offload the booster onto a transporter. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Delta IV Heavy common booster core is being offloaded from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance (ULA) Mariner docks at Port Canaveral in Florida carrying two of the three Delta IV Heavy Common Booster Cores for NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance (ULA) Mariner docks at Port Canaveral in Florida carrying two of the three Delta IV Heavy Common Booster Cores for NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance (ULA) Mariner arrives at Port Canaveral in Florida carrying two of the three Delta IV Heavy Common Booster Cores for NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

A United Launch Alliance Delta IV Heavy common booster core is offloaded from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

A United Launch Alliance Delta IV Heavy common booster core is about to be offloaded from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

A United Launch Alliance Delta IV Heavy common booster core is offloaded from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

A United Launch Alliance Delta IV Heavy common booster core is offloaded from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

A United Launch Alliance Delta IV Heavy common booster core is offloaded from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

A United Launch Alliance Delta IV Heavy common booster core is offloaded from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

A United Launch Alliance Delta IV Heavy common booster core is offloaded from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

A United Launch Alliance Delta IV Heavy second stage, packaged in its shipping container, is offloaded from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

A United Launch Alliance Delta IV Heavy common booster core is offloaded from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

A United Launch Alliance Delta IV Heavy common booster core is about to be offloaded from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

A United Launch Alliance Delta IV Heavy common booster core is offloaded from the company's Mariner ship at Port Canaveral in Florida. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Mariner arrives at Port Canaveral's Army Warf carrying the third Delta IV Heavy common booster core and second stage for NASA's upcoming Parker Solar Probe spacecraft. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Mariner arrives at Port Canaveral's Army Warf carrying the third Delta IV Heavy common booster core and second stage for NASA's upcoming Parker Solar Probe spacecraft. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Mariner arrives at Port Canaveral's Army Warf carrying the third Delta IV Heavy common booster core and second stage for NASA's upcoming Parker Solar Probe spacecraft. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Mariner arrives at Port Canaveral's Army Warf carrying the third Delta IV Heavy common booster core and second stage for NASA's upcoming Parker Solar Probe spacecraft. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Mariner arrives at Port Canaveral's Army Warf carrying the third Delta IV Heavy common booster core and second stage for NASA's upcoming Parker Solar Probe spacecraft. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Mariner arrives at Port Canaveral's Army Warf carrying the third Delta IV Heavy common booster core and second stage for NASA's upcoming Parker Solar Probe spacecraft. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Mariner arrives at Port Canaveral's Army Warf carrying the third Delta IV Heavy common booster core and second stage for NASA's upcoming Parker Solar Probe spacecraft. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Mariner arrives at Port Canaveral's Army Warf carrying the third Delta IV Heavy common booster core and second stage for NASA's upcoming Parker Solar Probe spacecraft. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Mariner arrives at Port Canaveral's Army Warf carrying the third Delta IV Heavy common booster core and second stage for NASA's upcoming Parker Solar Probe spacecraft. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Mariner arrives at Port Canaveral's Army Warf carrying the third Delta IV Heavy common booster core and second stage for NASA's upcoming Parker Solar Probe spacecraft. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The United Launch Alliance Mariner arrives at Port Canaveral's Army Warf carrying the third Delta IV Heavy common booster core and second stage for NASA's upcoming Parker Solar Probe spacecraft. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

A United Launch Alliance Delta IV Heavy second stage, packaged in its shipping container, has been offloaded from the company's Mariner ship at Port Canaveral in Florida. It will be transported to the Horizontal Integration Facility at Cape Canaveral Air Force Station for preflight processing. The Delta IV Heavy will launch NASA's upcoming Parker Solar Probe mission. The mission will perform the closest-ever observations of a star when it travels through the Sun's atmosphere, called the corona. The probe will rely on measurements and imaging to revolutionize our understanding of the corona and the Sun-Earth connection. Liftoff atop the Delta IV Heavy rocket is scheduled to take place from Cape Canaveral's Space Launch Complex 37 in summer 2018.

The Delta IV Heavy for Exploration Flight Test-1 (EFT-1) is being loaded on the Delta Mariner for transfer to the Kennedy Space Center on March 6, 2014.

The United Launch Alliance Delta Mariner arrives at Port Canaveral to deliver the Atlas V rocket that will be used to launch NASA's Magnetospheric Multiscale mission.

A truck begins to transport the Atlas V booster stage from the United Launch Alliance Delta Mariner. The rocket will be used to launch NASA's Magnetospheric Multiscale mission.

Trucks inside the United Launch Alliance Delta Mariner prepare to transport the Atlas V rocket and Centaur upper stage that will be used to launch NASA's Magnetospheric Multiscale mission.

Trucks inside the United Launch Alliance Delta Mariner prepare to transport the Atlas V rocket and Centaur upper stage that will be used to launch NASA's Magnetospheric Multiscale mission.

CAPE CANAVERAL, Fla. – A truck begins to transport the Atlas V booster stage from the United Launch Alliance Delta Mariner. The rocket will be used to launch NASA's Magnetospheric Multiscale mission. To learn about the MMS, go to http://go.nasa.gov/1GUbzxb. Photo credit: NASA/Ben Smegelsky

CAPE CANAVERAL, Fla. – Trucks inside the United Launch Alliance Delta Mariner prepare to transport the Atlas V rocket and Centaur upper stage that will be used to launch NASA's Magnetospheric Multiscale mission. To learn about the MMS, go to http://go.nasa.gov/1GUbzxb. Photo credit: NASA/Ben Smegelsky

Trucks transport the Atlas V rocket and Centaur upper stage from the United Launch Alliance Delta Mariner to the Atlas V Spaceflight Operations Center at Cape Canaveral Air Force Station. The rocket will be used to launch NASA's Magnetospheric Multiscale mission.

CAPE CANAVERAL, Fla. – Trucks inside the United Launch Alliance Delta Mariner prepare to transport the Atlas V rocket and Centaur upper stage that will be used to launch NASA's Magnetospheric Multiscale mission. To learn about the MMS, go to http://go.nasa.gov/1GUbzxb. Photo credit: NASA/Ben Smegelsky

The Launch Vehicle Adapter (LVA) that will attach Boeing’s first Starliner spacecraft to the Atlas V launch vehicle arrived at Cape Canaveral in Florida on November 11, 2018. The Mariner cargo vessel brought the LVA and two stages of a Delta IV rocket from United Launch Alliance's manufacturing plant in Decatur, Alabama.

A truck begins to transport a Centaur upper stage from the United Launch Alliance Delta Mariner to the Atlas V Spaceflight Operations Center at Cape Canaveral Air Force Station. The rocket will be used to launch NASA's Magnetospheric Multiscale mission.

CAPE CANAVERAL, Fla. – The United Launch Alliance Delta Mariner arrives at Port Canaveral to deliver the Atlas V rocket that will be used to launch NASA's Magnetospheric Multiscale mission. To learn about the MMS, go to http://go.nasa.gov/1GUbzxb. Photo credit: NASA/Ben Smegelsky

Trucks transport the Atlas V rocket and Centaur upper stage from the United Launch Alliance Delta Mariner to the Atlas V Spaceflight Operations Center at Cape Canaveral Air Force Station. The rocket will be used to launch NASA's Magnetospheric Multiscale mission.

CAPE CANAVERAL, Fla. – The Centaur upper stage is taken from Port Canaveral to the Atlas Spaceflight Operations Center, or ASOC, to begin checkout for the launch of the Radiation Belt Storm Probes, or RBSP, mission. Photo credit: NASA/Charisse Nahser

CAPE CANAVERAL, Fla. – A barge arrives at the U.S. Army Outpost wharf at Port Canaveral in Florida, carrying two of the three United Launch Alliance Delta IV heavy boosters for NASA’s upcoming Exploration Flight Test-1, or EFT-1, mission with the Orion spacecraft. The core booster and starboard booster will be offloaded and then transported to the Horizontal Integration Facility, or HIF, at Space Launch Complex 37 on Cape Canaveral Air Force Station. The port booster and the upper stage are planned to be shipped to Cape Canaveral in April. At the HIF, all three boosters will be processed and checked out before being moved to the nearby launch pad and hoisted into position. During the EFT-1 mission, Orion will travel farther into space than any human spacecraft has gone in more than 40 years. The data gathered during the flight will influence design decisions, validate existing computer models and innovative new approaches to space systems development, as well as reduce overall mission risks and costs for later Orion flights. Liftoff of Orion on EFT-1 is planned for fall 2014. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – A barge arrives at the U.S. Army Outpost wharf at Port Canaveral in Florida, carrying two of the three United Launch Alliance Delta IV heavy boosters for NASA’s upcoming Exploration Flight Test-1, or EFT-1, mission with the Orion spacecraft. The core booster and starboard booster will be offloaded and then transported to the Horizontal Integration Facility, or HIF, at Space Launch Complex 37 on Cape Canaveral Air Force Station. The port booster and the upper stage are planned to be shipped to Cape Canaveral in April. At the HIF, all three boosters will be processed and checked out before being moved to the nearby launch pad and hoisted into position. During the EFT-1 mission, Orion will travel farther into space than any human spacecraft has gone in more than 40 years. The data gathered during the flight will influence design decisions, validate existing computer models and innovative new approaches to space systems development, as well as reduce overall mission risks and costs for later Orion flights. Liftoff of Orion on EFT-1 is planned for fall 2014. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – The Centaur upper stage is moved into the Atlas Spaceflight Operations Center, or ASOC, to begin checkout for the launch of the Radiation Belt Storm Probes, or RBSP, mission. Photo credit: NASA/Charisse Nahser

CAPE CANAVERAL, Fla. – The Centaur upper stage is moved into the Atlas Spaceflight Operations Center, or ASOC, to begin checkout for the launch of the Radiation Belt Storm Probes, or RBSP, mission. Photo credit: NASA/Charisse Nahser

CAPE CANAVERAL, Fla. – The Centaur upper stage is moved into the Atlas Spaceflight Operations Center, or ASOC, to begin checkout for the launch of the Radiation Belt Storm Probes, or RBSP, mission. Photo credit: NASA/Charisse Nahser

The United Launch Alliance barge Delta Mariner docks in Port Canaveral in Florida on March 6, 2014. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities.

The United Launch Alliance barge Delta Mariner nears the dock in Port Canaveral in Florida on March 6, 2014. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities.

The United Launch Alliance barge Delta Mariner nears the dock in Port Canaveral in Florida on March 6, 2014. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities.

The United Launch Alliance barge Delta Mariner enters Port Canaveral in Florida on March 6, 2014. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities.

The United Launch Alliance barge Delta Mariner nears the dock in Port Canaveral in Florida on March 6, 2014. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities.

The United Launch Alliance barge Delta Mariner glides past the jetties as it enters Port Canaveral in Florida on March 6, 2014. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities.

CAPE CANAVERAL, Fla. – The Atlas V first stage booster for NASA's Radiation Belt Storm Probes mission emerges from United Launch Alliance's Delta Mariner barge at Port Canaveral in Florida. The Radiation Belt Storm Probes, or RBSP, mission will help us understand the sun’s influence on Earth and near-Earth space by studying the Earth’s radiation belts on various scales of space and time. For more information, visit http://www.nasa.gov/rbsp. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – At Port Canaveral in Florida, the Atlas V first stage booster for NASA's Radiation Belt Storm Probes mission is attached to a truck for offloading from United Launch Alliance's Delta Mariner barge. The Radiation Belt Storm Probes, or RBSP, mission will help us understand the sun’s influence on Earth and near-Earth space by studying the Earth’s radiation belts on various scales of space and time. For more information, visit http://www.nasa.gov/rbsp. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – The Atlas V first stage booster for NASA's Radiation Belt Storm Probes mission is towed away from the dock at Port Canaveral. The booster arrived on United Launch Alliance's barge, the Delta Mariner. The Radiation Belt Storm Probes, or RBSP, mission will help us understand the sun’s influence on Earth and near-Earth space by studying the Earth’s radiation belts on various scales of space and time. For more information, visit http://www.nasa.gov/rbsp. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – A truck begins to transport a Centaur upper stage from the United Launch Alliance Delta Mariner to the Atlas V Spaceflight Operations Center at Cape Canaveral Air Force Station. The rocket will be used to launch NASA's Magnetospheric Multiscale mission. To learn about the MMS, go to http://go.nasa.gov/1GUbzxb. Photo credit: NASA/Ben Smegelsky

CAPE CANAVERAL, Fla. – The Atlas V first stage booster for NASA's Radiation Belt Storm Probes mission is offloaded from United Launch Alliance's Delta Mariner barge at Port Canaveral in Florida. The Radiation Belt Storm Probes, or RBSP, mission will help us understand the sun’s influence on Earth and near-Earth space by studying the Earth’s radiation belts on various scales of space and time. For more information, visit http://www.nasa.gov/rbsp. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – The Atlas V first stage booster for NASA's Radiation Belt Storm Probes mission arrives at Port Canaveral in Florida aboard United Launch Alliance's Delta Mariner barge. The Radiation Belt Storm Probes, or RBSP, mission will help us understand the sun’s influence on Earth and near-Earth space by studying the Earth’s radiation belts on various scales of space and time. For more information, visit http://www.nasa.gov/rbsp. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – Trucks transport the Atlas V rocket and Centaur upper stage from the United Launch Alliance Delta Mariner to the Atlas V Spaceflight Operations Center at Cape Canaveral Air Force Station. The rocket will be used to launch NASA's Magnetospheric Multiscale mission. To learn about the MMS, go to http://go.nasa.gov/1GUbzxb. Photo credit: NASA/Ben Smegelsky

CAPE CANAVERAL, Fla. – United Launch Alliance's Delta Mariner barge arrives at Port Canaveral in Florida carrying the Atlas V first stage booster for NASA's Radiation Belt Storm Probes mission. The Radiation Belt Storm Probes, or RBSP, mission will help us understand the sun’s influence on Earth and near-Earth space by studying the Earth’s radiation belts on various scales of space and time. For more information, visit http://www.nasa.gov/rbsp. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – Trucks transport the Atlas V rocket and Centaur upper stage from the United Launch Alliance Delta Mariner to the Atlas V Spaceflight Operations Center at Cape Canaveral Air Force Station. The rocket will be used to launch NASA's Magnetospheric Multiscale mission. To learn about the MMS, go to http://go.nasa.gov/1GUbzxb. Photo credit: NASA/Ben Smegelsky

CAPE CANAVERAL, Fla. – At Port Canaveral in Florida, the Atlas V first stage booster for NASA's Radiation Belt Storm Probes mission waits to be offloaded from United Launch Alliance's Delta Mariner barge. The Radiation Belt Storm Probes, or RBSP, mission will help us understand the sun’s influence on Earth and near-Earth space by studying the Earth’s radiation belts on various scales of space and time. For more information, visit http://www.nasa.gov/rbsp. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – The Atlas V first stage booster for NASA's Radiation Belt Storm Probes mission is ready to be offloaded at Port Canaveral in Florida. The booster arrived on United Launch Alliance's barge, the Delta Mariner. The Radiation Belt Storm Probes, or RBSP, mission will help us understand the sun’s influence on Earth and near-Earth space by studying the Earth’s radiation belts on various scales of space and time. For more information, visit http://www.nasa.gov/rbsp. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner nears the dock in Port Canaveral in Florida. The barge is carrying two of the booster stages for the Delta IV Heavy rocket slated for Orion's Exploration Flight Test-1, or EFT-1. Orion is the exploration spacecraft designed to carry astronauts to destinations not yet explored by humans. It will have emergency abort capability, sustain the crew during space travel and provide safe re-entry from deep-space return velocities. The first unpiloted test flight of Orion is scheduled to launch in September 2014 atop a Delta IV Heavy rocket and in 2017 on NASA’s Space Launch System rocket. For more information, visit www.nasa.gov/orion. Photo credit: NASA/Frankie Martin

KENNEDY SPACE CENTER, FLA. - Two Boeing Delta IV first stages are being shipped on the Delta Mariner, heading for Cape Canaveral Air Force Station. After arrival at Port Canaveral, they will be transported to the Horizontal Integration Facility at Launch Complex 37, CCAFS. The rocket will be used for the December launching of the GOES-N weather satellite for NASA and NOAA. The GOES-N is the first in a series of three advanced weather satellites including GOES-O and GOES-P. This satellite will provide continuous monitoring necessary for intensive data analysis. It will provide a constant vigil for the atmospheric “triggers” of severe weather conditions such as tornadoes, flash floods, hail storms and hurricanes. When these conditions develop, GOES-N will be able to monitor storm development and track their movements.

KENNEDY SPACE CENTER, FLA. - A Boeing Delta IV first stage, called a Common Booster Core, is offloaded from the Delta Mariner at Port Canaveral. It is one of two shipped from Decatur, Ala., and is being transported to the Horizontal Integration Facility at Launch Complex 37, Cape Canaveral Air Force Station. The rocket will be used for the December launching of the GOES-N weather satellite for NASA and NOAA. The GOES-N is the first in a series of three advanced weather satellites including GOES-O and GOES-P. This satellite will provide continuous monitoring necessary for intensive data analysis. It will provide a constant vigil for the atmospheric “triggers” of severe weather conditions such as tornadoes, flash floods, hail storms and hurricanes. When these conditions develop, GOES-N will be able to monitor storm development and track their movements.

CAPE CANAVERAL, Fla. – Segments of the Ares I-X upper stage simulator are lined up in the cargo hold of the Delta Mariner, docked at Port Canaveral, Fla. The upper stage simulator will be used in the test flight identified as Ares I-X in 2009. The segments will simulate the mass and the outer mold line and will be more than 100 feet of the total vehicle height of 327 feet. The simulator comprises 11 segments that are approximately 18 feet in diameter. Most of the segments will be approximately 10 feet high, ranging in weight from 18,000 to 60,000 pounds, for a total of approximately 450,000 pounds. Photo credit: NASA/Dimitri Gerondidakis

PORT CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner arrives at Port Canaveral, Fla. delivering the Atlas V launch vehicle that will boost the Mars Atmosphere and Volatile Evolution, or MAVEN, spacecraft to the Red Planet. MAVEN is being prepared for its scheduled launch in November from Cape Canaveral Air Force Station, Fla. atop a United Launch Alliance Atlas V rocket. Positioned in an orbit above the Red Planet, MAVEN will study the upper atmosphere of Mars in unprecedented detail. For more information, visit: http://www.nasa.gov/mission_pages/maven/main/index.html Photo credit: NASA/ Dimitri Gerondidakis

PORT CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner arrives at Port Canaveral, Fla. delivering the Atlas V launch vehicle that will boost the Mars Atmosphere and Volatile Evolution, or MAVEN, spacecraft to the Red Planet. MAVEN is being prepared for its scheduled launch in November from Cape Canaveral Air Force Station, Fla. atop a United Launch Alliance Atlas V rocket. Positioned in an orbit above the Red Planet, MAVEN will study the upper atmosphere of Mars in unprecedented detail. For more information, visit: http://www.nasa.gov/mission_pages/maven/main/index.html Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – The Delta Mariner docks at Port Canaveral, Fla., with its cargo of the Ares I-X upper stage simulator segments. The upper stage simulator will be used in the test flight identified as Ares I-X in 2009. The segments will simulate the mass and the outer mold line and will be more than 100 feet of the total vehicle height of 327 feet. The simulator comprises 11 segments that are approximately 18 feet in diameter. Most of the segments will be approximately 10 feet high, ranging in weight from 18,000 to 60,000 pounds, for a total of approximately 450,000 pounds. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – The Delta Mariner arrives at Port Canaveral, Fla., with its cargo of the Ares I-X upper stage simulator segments. The upper stage simulator will be used in the test flight identified as Ares I-X in 2009. The segments will simulate the mass and the outer mold line and will be more than 100 feet of the total vehicle height of 327 feet. The simulator comprises 11 segments that are approximately 18 feet in diameter. Most of the segments will be approximately 10 feet high, ranging in weight from 18,000 to 60,000 pounds, for a total of approximately 450,000 pounds. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – On the bridge of the Delta Mariner, whose cargo is the Ares I-X upper stage simulator segments. The upper stage simulator will be used in the test flight identified as Ares I-X in 2009. The segments will simulate the mass and the outer mold line and will be more than 100 feet of the total vehicle height of 327 feet. The simulator comprises 11 segments that are approximately 18 feet in diameter. Most of the segments will be approximately 10 feet high, ranging in weight from 18,000 to 60,000 pounds, for a total of approximately 450,000 pounds. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – The Delta Mariner docks at Port Canaveral, Fla., with its cargo of the Ares I-X upper stage simulator segments. The upper stage simulator will be used in the test flight identified as Ares I-X in 2009. The segments will simulate the mass and the outer mold line and will be more than 100 feet of the total vehicle height of 327 feet. The simulator comprises 11 segments that are approximately 18 feet in diameter. Most of the segments will be approximately 10 feet high, ranging in weight from 18,000 to 60,000 pounds, for a total of approximately 450,000 pounds. Photo credit: NASA/Dimitri Gerondidakis

PORT CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner arrives at Port Canaveral, Fla. delivering the Atlas V launch vehicle that will boost the Mars Atmosphere and Volatile Evolution, or MAVEN, spacecraft to the Red Planet. MAVEN is being prepared for its scheduled launch in November from Cape Canaveral Air Force Station, Fla. atop a United Launch Alliance Atlas V rocket. Positioned in an orbit above the Red Planet, MAVEN will study the upper atmosphere of Mars in unprecedented detail. For more information, visit: http://www.nasa.gov/mission_pages/maven/main/index.html Photo credit: NASA/ Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Segments of the Ares I-X upper stage simulator are lined up in the cargo hold of the Delta Mariner, docked at Port Canaveral, Fla. The upper stage simulator will be used in the test flight identified as Ares I-X in 2009. The segments will simulate the mass and the outer mold line and will be more than 100 feet of the total vehicle height of 327 feet. The simulator comprises 11 segments that are approximately 18 feet in diameter. Most of the segments will be approximately 10 feet high, ranging in weight from 18,000 to 60,000 pounds, for a total of approximately 450,000 pounds. Photo credit: NASA/Dimitri Gerondidakis

PORT CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner arrives at Port Canaveral, Fla. delivering the Atlas V launch vehicle that will boost the Mars Atmosphere and Volatile Evolution, or MAVEN, spacecraft to the Red Planet. MAVEN is being prepared for its scheduled launch in November from Cape Canaveral Air Force Station, Fla. atop a United Launch Alliance Atlas V rocket. Positioned in an orbit above the Red Planet, MAVEN will study the upper atmosphere of Mars in unprecedented detail. For more information, visit: http://www.nasa.gov/mission_pages/maven/main/index.html Photo credit: NASA/Kim Shiflett

PORT CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner arrives at Port Canaveral, Fla. delivering the Atlas V launch vehicle that will boost the Mars Atmosphere and Volatile Evolution, or MAVEN, spacecraft to the Red Planet. MAVEN is being prepared for its scheduled launch in November from Cape Canaveral Air Force Station, Fla. atop a United Launch Alliance Atlas V rocket. Positioned in an orbit above the Red Planet, MAVEN will study the upper atmosphere of Mars in unprecedented detail. For more information, visit: http://www.nasa.gov/mission_pages/maven/main/index.html Photo credit: NASA/ Dimitri Gerondidakis

PORT CANAVERAL, Fla. – The United Launch Alliance barge Delta Mariner arrives at Port Canaveral, Fla. delivering the Atlas V launch vehicle that will boost the Mars Atmosphere and Volatile Evolution, or MAVEN, spacecraft to the Red Planet. MAVEN is being prepared for its scheduled launch in November from Cape Canaveral Air Force Station, Fla. atop a United Launch Alliance Atlas V rocket. Positioned in an orbit above the Red Planet, MAVEN will study the upper atmosphere of Mars in unprecedented detail. For more information, visit: http://www.nasa.gov/mission_pages/maven/main/index.html Photo credit: NASA/Kim Shiflett