Northrop Grumman and subcontractor Thales Alenia Space complete fabrication work on the Habitation and Logistics Outpost (HALO) module, one of two of the Gateway Space Station's habitation elements where astronauts will live and work in lunar orbit during deep space Artemis missions.

The primary structure of the Gateway space station's HALO (Habitation and Logistics Outpost) module is one step closer to launch following welding completion in Turin, Italy. HALO is one of four Gateway modules where astronauts will live, conduct science, and prepare for lunar surface missions. NASA is partnering with Northrop Grumman and their subcontractor Thales Alenia Space to develop HALO.

Halo of Hollows

Hazy Halo

A Halo of Moons

Titan Halo

Northrop Grumman and subcontractor Thales Alenia Space complete fabrication work on the Habitation and Logistics Outpost (HALO) module, one of two of the Gateway Space Station's habitation elements where astronauts will live and work in lunar orbit during deep space Artemis missions.

NASA astronaut Randy Bresnik peers inside the HALO module during a close-up look on April 24, 2024, at Northrop Grumman’s facility in Gilbert, Arizona. The visit was part of an event commemorating HALO’s arrival in the United States, marking a major milestone for Gateway.

Northrop Grumman and subcontractor Thales Alenia Space complete fabrication work on the Habitation and Logistics Outpost (HALO) module, one of two of the Gateway Space Station's habitation elements where astronauts will live and work in lunar orbit during deep space Artemis missions.

Northrop Grumman and subcontractor Thales Alenia Space complete fabrication work on the Habitation and Logistics Outpost (HALO) module, one of two of the Gateway Space Station's habitation elements where astronauts will live and work in lunar orbit during deep space Artemis missions.

An Intriguing Dark Halo

Jupiter Main Ring and Halo

Dark Halo Crater in Orientale

Craters with Dark Halos on Mercury http://photojournal.jpl.nasa.gov/catalog/PIA10602

A close-up image of Gateway's Habitation and Logistics Outpost (HALO) module, one of two of the space station's habitation elements. HALO is provided by Northrop Grumman and is where astronauts will live, conduct science, and prepare for lunar surface missions.

Titan murky atmosphere shines as a halo of scattered light

Dr. Lori Glaze, acting associate administrator for NASA’s Exploration Systems Development Mission Directorate, and Dr. Jon B. Olansen, Gateway Program manager, on stage during an April 24, 2025, event at Northrop Grumman’s facility in Gilbert, Arizona, commemorating HALO’s arrival in the United States.

Gateway’s HALO (Habitation and Logistics Outpost) at Northrop Grumman’s facility in Gilbert, Arizona, on April 4, 2025, shortly after its arrival from Thales Alenia Space in Turin, Italy.

At Northrop Grumman’s Gilbert, Arizona, facility, teams transport Gateway’s HALO (Habitation and Logistics Outpost). HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams begin removing Gateway’s HALO (Habitation and Logistics Outpost) from its transport container. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams begin removing Gateway’s HALO (Habitation and Logistics Outpost) from its transport container. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams begin removing Gateway’s HALO (Habitation and Logistics Outpost) from its transport container. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams remove Gateway’s HALO (Habitation and Logistics Outpost) from its transport container. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams remove Gateway’s HALO (Habitation and Logistics Outpost) from its transport container. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams transport Gateway’s HALO (Habitation and Logistics Outpost). HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

Bright Halo Impact Crater on Ganymede http://photojournal.jpl.nasa.gov/catalog/PIA00357

Gateway’s HALO (Habitation and Logistics Outpost) at Northrop Grumman’s facility in Gilbert, Arizona, on April 4, 2025, shortly after its arrival from Thales Alenia Space in Turin, Italy.

At Northrop Grumman’s Gilbert, Arizona, facility, teams guide Gateway’s HALO (Habitation and Logistics Outpost) down a hallway. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams remove Gateway’s HALO (Habitation and Logistics Outpost) from its transport container. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams remove Gateway’s HALO (Habitation and Logistics Outpost) from its transport container. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams remove Gateway’s HALO (Habitation and Logistics Outpost) from its transport container. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams begin removing Gateway’s HALO (Habitation and Logistics Outpost) from its transport container. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams remove Gateway’s HALO (Habitation and Logistics Outpost) from its transport container. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams remove Gateway’s HALO (Habitation and Logistics Outpost) from its transport container. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

At Northrop Grumman’s Gilbert, Arizona, facility, teams begin removing Gateway’s HALO (Habitation and Logistics Outpost) from its transport container. HALO arrived from Turin, Italy, where Thales Alenia Space fabricated its primary structure. The module will undergo final outfitting in Gilbert before being integrated with the Power and Propulsion Element and launched to lunar orbit.

With its thick, distended atmosphere, Titan orange globe shines softly, encircled by a thin halo of purple light-scattering haze

At the Thales Alenia Space facility in Turin, Italy, technicians prepare Gateway’s HALO (Habitation and Logistics Outpost) for transport. The module’s primary structure, fabricated by Thales Alenia Space, will travel to Northrop Grumman’s facility in Gilbert, Arizona, for final outfitting ahead of its launch to lunar orbit.

At the Thales Alenia Space facility in Turin, Italy, technicians prepare Gateway’s HALO (Habitation and Logistics Outpost) for transport. The module’s primary structure, fabricated by Thales Alenia Space, will travel to Northrop Grumman’s facility in Gilbert, Arizona, for final outfitting ahead of its launch to lunar orbit.

Gateway’s HALO (Habitation and Logistics Outpost) departs Italy en route to Arizona, where it will undergo final outfitting at Northrop Grumman’s facility in Gilbert ahead of its launch to lunar orbit. The module’s primary structure was fabricated by Thales Alenia Space in Turin.

At a Thales Alenia Space facility in Turin, Italy, technicians prepare Gateway’s HALO (Habitation and Logistics Outpost) for transport. The module’s primary structure, fabricated by Thales Alenia Space, will travel to Northrop Grumman’s facility in Gilbert, Arizona, for final outfitting ahead of its launch to lunar orbit.

At the Thales Alenia Space facility in Turin, Italy, technicians prepare Gateway’s HALO (Habitation and Logistics Outpost) for transport. The module’s primary structure, fabricated by Thales Alenia Space, will travel to Northrop Grumman’s facility in Gilbert, Arizona, for final outfitting ahead of its launch to lunar orbit.

Gateway’s HALO (Habitation and Logistics Outpost) departs Italy en route to Arizona, where it will undergo final outfitting at Northrop Grumman’s facility in Gilbert ahead of its launch to lunar orbit. The module’s primary structure was fabricated by Thales Alenia Space in Turin.

Gateway’s HALO (Habitation and Logistics Outpost) departs Italy en route to Arizona, where it will undergo final outfitting at Northrop Grumman’s facility in Gilbert ahead of its launch to lunar orbit. The module’s primary structure was fabricated by Thales Alenia Space in Turin.

Gateway’s HALO (Habitation and Logistics Outpost) departs Italy en route to Arizona, where it will undergo final outfitting at Northrop Grumman’s facility in Gilbert ahead of its launch to lunar orbit. The module’s primary structure was fabricated by Thales Alenia Space in Turin.

At the Thales Alenia Space facility in Turin, Italy, technicians prepare Gateway’s HALO (Habitation and Logistics Outpost) for transport. The module’s primary structure, fabricated by Thales Alenia Space, will travel to Northrop Grumman’s facility in Gilbert, Arizona, for final outfitting ahead of its launch to lunar orbit.

At the Thales Alenia Space facility in Turin, Italy, technicians prepare Gateway’s HALO (Habitation and Logistics Outpost) for transport. The module’s primary structure, fabricated by Thales Alenia Space, will travel to Northrop Grumman’s facility in Gilbert, Arizona, for final outfitting ahead of its launch to lunar orbit.

At the Thales Alenia Space facility in Turin, Italy, technicians prepare Gateway’s HALO (Habitation and Logistics Outpost) for transport. The module’s primary structure, fabricated by Thales Alenia Space, will travel to Northrop Grumman’s facility in Gilbert, Arizona, for final outfitting ahead of its launch to lunar orbit.

At the Thales Alenia Space facility in Turin, Italy, technicians prepare Gateway’s HALO (Habitation and Logistics Outpost) for transport. The module’s primary structure, fabricated by Thales Alenia Space, will travel to Northrop Grumman’s facility in Gilbert, Arizona, for final outfitting ahead of its launch to lunar orbit.

At the Thales Alenia Space facility in Turin, Italy, technicians prepare Gateway’s HALO (Habitation and Logistics Outpost) for transport. The module’s primary structure, fabricated by Thales Alenia Space, will travel to Northrop Grumman’s facility in Gilbert, Arizona, for final outfitting ahead of its launch to lunar orbit.

Gateway’s HALO (Habitation and Logistics Outpost) departs Italy en route to Arizona, where it will undergo final outfitting at Northrop Grumman’s facility in Gilbert ahead of its launch to lunar orbit. The module’s primary structure was fabricated by Thales Alenia Space in Turin.

Gateway’s HALO (Habitation and Logistics Outpost) departs Italy en route to Arizona, where it will undergo final outfitting at Northrop Grumman’s facility in Gilbert ahead of its launch to lunar orbit. The module’s primary structure was fabricated by Thales Alenia Space in Turin.

At a Thales Alenia Space facility in Turin, Italy, technicians prepare Gateway’s HALO (Habitation and Logistics Outpost) for transport. The module’s primary structure, fabricated by Thales Alenia Space, will travel to Northrop Grumman’s facility in Gilbert, Arizona, for final outfitting ahead of its launch to lunar orbit.

The Sun blew out a powerful coronal mass ejection (CME) from just around the edge of the Sun (Oct. 14, 2014). The particle cloud expanded around all the Sun in a rough circle, hence the name 'halo' CME. This event was also associated with a fairly strong flare. The active region that was the source of these events is just rotating into view. Then, we can better observe its size and structure. The bright object to the right and just above the Sun is Venus now on the far side of the Sun. Credit: NASA/ESA/SOHO <b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a></b> <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. <b>Follow us on <a href="http://twitter.com/NASAGoddardPix" rel="nofollow">Twitter</a></b> <b>Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b> <b>Find us on <a href="http://instagram.com/nasagoddard?vm=grid" rel="nofollow">Instagram</a></b>

The Cassini spacecraft looks down on Titan north pole and unveils the moon upper-most atmospheric hazes, creating the appearance of a halo around Saturn largest moon.

Northrop Grumman and subcontractor Thales Alenia Space complete fabrication work on the Habitation and Logistics Outpost (HALO) module, one of two of the Gateway Space Station's habitation elements where astronauts will live and work in lunar orbit during deep space Artemis missions.

Bright Rays Extending from a Halo of Darkness Gaze upon Basho

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

The High Altitude Lidar Observatory (HALO) system electronics and diagnostic tools are integrated onto the DC-8 airborne science laboratory at NASA Armstrong Flight Research Center in Edwards, California. The lidar system control electronics are on the right hand side of the rack. The large monitors on the left are used to display real-time images of water vapor and aerosol profiles, which are used by the science team to guide in-flight decisions and navigation. The compact HALO instrument head can be seen directly behind the electronics rack.

Within Pluto informally named Vega Terra region is a field of eye-catching craters that looks like a cluster of bright halos scattered across a dark landscape as seen by NASA New Horizons.

iss052e006482 (6/23/2017) --- Astronaut Peggy Whitson is photographed during a test session of the Synchronized Position Hold, Engage, Reorient, Experimental Satellites (SPHERES) Halo investigation in the Kibo module. The SPHERES Halo investigation studies the possibility of launching several separate components and then attaching them once they are in space. The investigation upgrades the International Space Station’s fleet of SPHERES to enable each SPHERE to communicate with six external objects at the same time, testing new control and remote assembly methods.

Aerosol data from the High Altitude Lidar Observatory (HALO), pictured here, will give mission scientists a better sense how Doppler Aerosol Wind Lidar (DAWN) is working and what its strengths and weaknesses are.

NASA's Cassini spacecraft looks towards the dark side of Saturn's largest moon, Titan, capturing the blue halo caused by a haze layer that hovers high in the moon's atmosphere. The haze that permeates Titan's atmosphere scatters sunlight and produces the orange color seen here. More on Titan's orange and blue hazes can be found at PIA14913. This view looks towards the side of Titan (3,200 miles or 5,150 kilometers across) that leads in its orbit around Saturn. North on Titan is up and rotated 40 degrees to the left. Images taken using red, green and blue spectral filters were combined to create this natural-color view. The images were taken with the Cassini spacecraft narrow-angle camera on Nov. 3, 2013. The view was acquired at a distance of approximately 2.421 million miles (3.896 million kilometers) from Titan. Image scale is 14 miles (23 kilometers) per pixel. http://photojournal.jpl.nasa.gov/catalog/PIA17180

Our Milky Way galaxy and its small companions are surrounded by a giant halo of million-degree gas (seen in blue in this artists' rendition) that is only visible to X-ray telescopes in space. University of Michigan astronomers discovered that this massive hot halo spins in the same direction as the Milky Way disk and at a comparable speed. Read more: <a href="http://go.nasa.gov/29VgLdK" rel="nofollow">go.nasa.gov/29VgLdK</a> Credit: NASA/CXC/M.Weiss/Ohio State/A Gupta et al <b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a></b> <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. <b>Follow us on <a href="http://twitter.com/NASAGoddardPix" rel="nofollow">Twitter</a></b> <b>Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b> <b>Find us on <a href="http://instagrid.me/nasagoddard/?vm=grid" rel="nofollow">Instagram</a></b>

A giant cloud appears to expand outward from the sun in all directions in this image from Sept. 28, 2012, which is called a halo CME. This kind of image occurs when a CME moves toward Earth – as here – or directly away from it. Credit: ESA/NASA/SOHO CME WEEK: What To See in CME Images Two main types of explosions occur on the sun: solar flares and coronal mass ejections. Unlike the energy and x-rays produced in a solar flare – which can reach Earth at the speed of light in eight minutes – coronal mass ejections are giant, expanding clouds of solar material that take one to three days to reach Earth. Once at Earth, these ejections, also called CMEs, can impact satellites in space or interfere with radio communications. During CME WEEK from Sept. 22 to 26, 2014, we explore different aspects of these giant eruptions that surge out from the star we live with. When a coronal mass ejection blasts off the sun, scientists rely on instruments called coronagraphs to track their progress. Coronagraphs block out the bright light of the sun, so that the much fainter material in the solar atmosphere -- including CMEs -- can be seen in the surrounding space. CMEs appear in these images as expanding shells of material from the sun's atmosphere -- sometimes a core of colder, solar material (called a filament) from near the sun's surface moves in the center. But mapping out such three-dimensional components from a two-dimensional image isn't easy. Watch the slideshow to find out how scientists interpret what they see in CME pictures. The images in the slideshow are from the three sets of coronagraphs NASA currently has in space. One is on the joint European Space Agency and NASA Solar and Heliospheric Observatory, or SOHO. SOHO launched in 1995, and sits between Earth and the sun about a million miles away from Earth. The other two coronagraphs are on the two spacecraft of the NASA Solar Terrestrial Relations Observatory, or STEREO, mission, which launched in 2006. The two STEREO spacecraft are both currently viewing the far side of the sun. Together these instruments help scientists create a three-dimensional model of any CME as its journey unfolds through interplanetary space. Such information can show why a given characteristic of a CME close to the sun might lead to a given effect near Earth, or any other planet in the solar system...<b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a></b> <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. <b>Follow us on <a href="http://twitter.com/NASAGoddardPix" rel="nofollow">Twitter</a></b> <b>Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b> <b>Find us on <a href="http://instagram.com/nasagoddard?vm=grid" rel="nofollow">Instagram</a></b>

There's no way to tell from this SOHO image whether the halo CME on March 5, 2013, originated from the front or far of the sun. But the STEREO spacecraft were watching the sun from the sides and showed it was from the far side. The bright planet is Venus. Credit: NASA/SOHO CME WEEK: What To See in CME Images Two main types of explosions occur on the sun: solar flares and coronal mass ejections. Unlike the energy and x-rays produced in a solar flare – which can reach Earth at the speed of light in eight minutes – coronal mass ejections are giant, expanding clouds of solar material that take one to three days to reach Earth. Once at Earth, these ejections, also called CMEs, can impact satellites in space or interfere with radio communications. During CME WEEK from Sept. 22 to 26, 2014, we explore different aspects of these giant eruptions that surge out from the star we live with. When a coronal mass ejection blasts off the sun, scientists rely on instruments called coronagraphs to track their progress. Coronagraphs block out the bright light of the sun, so that the much fainter material in the solar atmosphere -- including CMEs -- can be seen in the surrounding space. CMEs appear in these images as expanding shells of material from the sun's atmosphere -- sometimes a core of colder, solar material (called a filament) from near the sun's surface moves in the center. But mapping out such three-dimensional components from a two-dimensional image isn't easy. Watch the slideshow to find out how scientists interpret what they see in CME pictures. The images in the slideshow are from the three sets of coronagraphs NASA currently has in space. One is on the joint European Space Agency and NASA Solar and Heliospheric Observatory, or SOHO. SOHO launched in 1995, and sits between Earth and the sun about a million miles away from Earth. The other two coronagraphs are on the two spacecraft of the NASA Solar Terrestrial Relations Observatory, or STEREO, mission, which launched in 2006. The two STEREO spacecraft are both currently viewing the far side of the sun. Together these instruments help scientists create a three-dimensional model of any CME as its journey unfolds through interplanetary space. Such information can show why a given characteristic of a CME close to the sun might lead to a given effect near Earth, or any other planet in the solar system...<b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a></b> <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. <b>Follow us on <a href="http://twitter.com/NASAGoddardPix" rel="nofollow">Twitter</a></b> <b>Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b> <b>Find us on <a href="http://instagram.com/nasagoddard?vm=grid" rel="nofollow">Instagram</a></b>

The High Altitude Lidar Observatory (HALO) instrument head, which houses the lidar instrument, is installed onto the DC-8 airborne science laboratory at NASA Armstrong Flight Research Center in Edwards, California. The gold and blue casing holds the laser, optics, detectors, and electronics, which are at the heart of the lidar.

Pale zones called "halos" border bedrock fractures visible in this 2015 image from NASA's Curiosity Mars rover which has been darkened (a previously released image can be seen at PIA20268). Measurements overlaid on the image offer a sense of scale for the size of these fractures. The rover team determined that the halos are rich in silica, a clue to the duration of wet environmental conditions long ago. The location is on the lower slope of Mars' Mount Sharp. Curiosity's Navigation Camera (Navcam) acquired the component images of this mosaic on Aug. 23, 2015, during the 1.083rd Martian day, or sol, of the mission. The location is along the rover's path between "Marias Pass" and "Bridger Basin." In this region, the rover has found fracture zones to be associated with rock compositions enriched in silica, relative to surrounding bedrock. https://photojournal.jpl.nasa.gov/catalog/PIA21649

A mosaic of four images taken through the clear filter (610 nanometers) of the solid state imaging (CCD) system aboard NASA's Galileo spacecraft on November 8, 1996, at a resolution of approximately 46 kilometers (km) per picture element (pixel) along the rings; however, because the spacecraft was only about 0.5 degrees above the ring plane, the image is highly foreshortened in the vertical direction. The images were obtained when Galileo was in Jupiter's shadow peering back toward the Sun; the ring was approximately 2,300,000 kilometers (km) away. The arc on the far right of the image is produced by sunlight scattered by small particles comprising Jupiter's upper atmospheric haze. The ring also efficiently scatters light, indicating that much of its brightness is due to particles that are microns or less in diameter. Such small particles are believed to have human-scale lifetimes, i.e., very brief compared to the solar system's age. Jupiter's ring system is composed of three parts -- a flat main ring, a lenticular halo interior to the main ring, and the gossamer ring, which lies exterior to the main ring. The near and far arms of Jupiter's main ring extend horizontally across the mosaic, joining together at the ring's ansa, on the far left side of the figure. The near arm of the ring appears to be abruptly truncated close to the planet, at the point where it passes into Jupiter's shadow. A faint mist of particles can be seen above and below the main rings; this vertically extended, toroidal "halo" is unusual in planetary rings, and is probably caused by electromagnetic forces which can push small grains out of the ring plane. Halo material is present across this entire image, implying that it reaches more than 27,000 km above the ring plane. Because of shadowing, the halo is not visible close to Jupiter in the lower right part of the mosaic. In order to accentuate faint features in the image, different brightnesses are shown through color, with the brightest being white or yellow and the faintest purple. http://photojournal.jpl.nasa.gov/catalog/PIA00658

Gateway's HALO (Habitation and Logistics Outpost) floats through the Thales Alenia Space industrial facility in Turin, Italy for stress testing to ensure its safety.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.

Gateway’s HALO (Habitation and Logistics Outpost) arrives in Mesa, Arizona, after traveling from Italy, where Thales Alenia Space fabricated its primary structure. Delivered by cargo aircraft to Phoenix-Mesa Gateway Airport, HALO will be transported to Northrop Grumman’s facility in Gilbert for final outfitting.