United States Postal Service Vice Chairman, Board of Governors, Anton Hajjar, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

United States Postal Service Vice Chairman, Board of Governors, Anton Hajjar, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

Lisa Whitehead of the United States Postal Service sings the national anthem at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

Lisa Whitehead of the United States Postal Service sings the national anthem at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

National Postal Museum Deputy Director, Toby Mensforth, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

Smithsonian Institution Under Secretary for Service and Research, Ellen Stofan, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

Smithsonian Institution Under Secretary for Service and Research, Ellen Stofan, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

Smithsonian Institution Under Secretary for Service and Research, Ellen Stofan, autographs a piece of mail with the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on it, at the first-day-of-issue event, Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA’s Goddard Space Flight Center Webb Deputy Observatory Project Scientist, Erin Smith, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA Associate Administrator and former astronaut Bob Cabana provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA public affairs specialist Alice Fisher introduces the first speaker at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA’s Goddard Space Flight Center Webb Optical Telescope Element Manager, Lee Feinberg, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA’s Goddard Space Flight Center Webb Deputy Observatory Project Scientist, Erin Smith, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA Associate Administrator and former astronaut Bob Cabana provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA Associate Administrator and former astronaut Bob Cabana, autographs a piece of mail with the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on it, at the first-day-of-issue event, Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA’s Goddard Space Flight Center Webb Optical Telescope Element Manager, Lee Feinberg, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA’s Goddard Space Flight Center Webb Optical Telescope Element Manager, Lee Feinberg, autographs a piece of mail with the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on it, at the first-day-of-issue event, Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA Associate Administrator and former astronaut Bob Cabana provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA’s Goddard Space Flight Center Webb Deputy Observatory Project Scientist, Erin Smith, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA’s Goddard Space Flight Center Webb Deputy Observatory Project Scientist, Erin Smith, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA Associate Administrator and former astronaut Bob Cabana, autographs a piece of mail with the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on it, at the first-day-of-issue event, Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA Associate Administrator and former astronaut Bob Cabana provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA’s Goddard Space Flight Center Webb Deputy Observatory Project Scientist, Erin Smith, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA’s Goddard Space Flight Center Webb Deputy Observatory Project Scientist, Erin Smith, provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA Associate Administrator and former astronaut Bob Cabana provides remarks at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

From left to right, NASA’s Goddard Space Flight Center Webb Deputy Observatory Project Scientist, Erin Smith, NASA’s Goddard Space Flight Center Webb Optical Telescope Element Manager, Lee Feinberg, Smithsonian Institution Under Secretary for Service and Research, Ellen Stofan, NASA Associate Administrator and former astronaut Bob Cabana, United States Postal Service Vice Chairman, Board of Governors, Anton Hajjar, NASA public affairs specialist Alice Fisher, National Postal Museum Deputy Director, Toby Mensforth, and Lisa Whitehead, USPS, unveil the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) at the first-day-of-issue event on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

From left to right, NASA’s Goddard Space Flight Center Webb Optical Telescope Element Manager, Lee Feinberg, NASA Associate Administrator and former astronaut Bob Cabana, Smithsonian Institution Under Secretary for Service and Research, Ellen Stofan, United States Postal Service Vice Chairman, Board of Governors, Anton Hajjar, National Postal Museum Deputy Director Toby Mensforth, Lisa Whitehead, USPS, NASA’s Goddard Space Flight Center Webb Deputy Observatory Project Scientist, Erin Smith, and NASA public affairs specialist, Alice Fisher, pose for a photo at the conclusion of the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

From left to right, NASA’s Goddard Space Flight Center Webb Deputy Observatory Project Scientist, Erin Smith, NASA’s Goddard Space Flight Center Webb Optical Telescope Element Manager, Lee Feinberg, Smithsonian Institution Under Secretary for Service and Research, Ellen Stofan, NASA Associate Administrator and former astronaut Bob Cabana, United States Postal Service Vice Chairman, Board of Governors, Anton Hajjar, NASA public affairs specialist Alice Fisher, National Postal Museum Deputy Director, Toby Mensforth, and Lisa Whitehead, USPS, unveil the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) at the first-day-of-issue event on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

From left to right, NASA’s Goddard Space Flight Center Webb Deputy Observatory Project Scientist, Erin Smith, NASA’s Goddard Space Flight Center Webb Optical Telescope Element Manager, Lee Feinberg, Smithsonian Institution Under Secretary for Service and Research, Ellen Stofan, NASA Associate Administrator and former astronaut Bob Cabana, United States Postal Service Vice Chairman, Board of Governors, Anton Hajjar, NASA public affairs specialist Alice Fisher, National Postal Museum Deputy Director, Toby Mensforth, and Lisa Whitehead, USPS, applaud after unveiling the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) at the first-day-of-issue event on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

NASA Associate Administrator and former astronaut, Bob Cabana, second from left, and Smithsonian Institution Under Secretary for Service and Research, Ellen Stofan, third from left, are seen during the singing of the national anthem at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

Speakers at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST), autograph a piece of mail with the stamp on it, Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

James Webb Space Telescope team members pose for a photo at the first-day-of-issue event for the United States Postal Service’s new stamp celebrating NASA’s James Webb Space Telescope (JWST) on Thursday, Sept. 8, 2022, at the Smithsonian’s National Postal Museum in Washington. The stamp, which features an illustration of the observatory, honors Webb’s mission to explore the unknown in our universe – solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the structures and origins of our universe and our place in it. Photo Credit: (NASA/Aubrey Gemignani)

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, Mercury Astronaut Scott Carpenter speaks to the audience gathered for the unveiling of two new stamps that commemorate the 50th anniversary of human spaceflight from the United States Postal Service. Listening to him speak is Director of Education and External Relations for Kennedy, Cheryl Hurst (left), Center Director, Bob Cabana and United States Postal Service Official Steve Massey. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, United States Postal Service official Steve Massey addresses the audience during an event unveiling two new stamps that commemorate the 50th anniversary of human spaceflight from the United States Postal Service. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

The towns of Santa Claus, Ga., (top) and Santa Claus, Ind. (bottom), are shown in these two images from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument on NASA's Terra satellite. They are the only two Santa Claus towns in the United States with post offices and zip codes, although there are 11 towns with this name in the United States. Santa Claus, Ga. is located in Toombs County, and has a population of 237. Santa Claus, Ind. is located in Spencer County, and has a population of 2,041. Its name was accepted by the United States Postal Service in 1856. The images were acquired on July 3, 2000 (top) and June 16, 2001 (bottom), respectively. http://photojournal.jpl.nasa.gov/catalog/PIA03891

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, Laura Churchley (left), Alice Wackerman and Julie Jenkins, daughters of Mercury Astronaut Alan Shepard, speak to the audience in attendance for the United States Postal Service unveiling of two new stamps to commemorate the 50th anniversary of human spaceflight. Listening to them speak is Director of Education and External Relations for Kennedy, Cheryl Hurst (left), Kennedy Center Director, Bob Cabana and United States Postal Service official Steve Massey. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, the audience and speakers stand for the Pledge of Allegiance and the singing of the National Anthem by a member of the 45th Space Wing Honor Guard from Patrick Air Force Base in Florida. Also on stage are, from left, Director of Education and External Relations for Kennedy Cheryl Hurst, Center Director Bob Cabana and United States Postal Service official Steve Massey, Mercury Astronaut Scott Carpenter, NASA Administrator, Charlie Bolden, Julie Jenkins and NASA's Deputy Director for Planetary Science, Jim Adams, all in attendance for the United States Postal Service unveiling of two new stamps to commemorate the 50th anniversary of human spaceflight. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

S71-41694 (2 Aug. 1971) --- Artist Robert McCall of Paradise Valley, Arizona, holds a sheet of commemorative postage stamps commemorating the Apollo 15 lunar landing mission. McCall was chose by the U.S. Postal Service to design the eight-cent stamp which heralds: "United States in Space -- A Decade of Achievement." McCall, who has maintained a close tie with the space program for many years, has been commissioned by the National Aeronautics and Space Administration to portray Apollo 15 activities from the Mission Control Center at the Manned Spacecraft Center, Houston, Texas.

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, a United States Postal Service poster reveals the two new stamps that commemorate the 50th anniversary of human spaceflight. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

Stephanie Martin, left, NASA Office of Communications, and Nilufar Ramji, NASA Office of STEM Engagement, host a live broadcast of “STEM Forward to the Moon” on July 19, 2019 from Kennedy Space Center’s Apollo/Saturn V Center in Florida. The special program featured kids participating in Moon landing simulations at four museums throughout the country: Cosmosphere in Hutchinson, Kansas; Saint Louis Science Center; Columbia Memorial Space Center in Downey, California; and Arizona Science Center in Phoenix.

Derrol Nail, left, and Marie Lewis, NASA Office of Communications, host a special Apollo 11 show titled “NASA’s Giant Leaps: Past and Future” on July 19, 2019. The show, which honored the heroes of Apollo and examined NASA’s future plans, was broadcast live from Kennedy Space Center’s Apollo/Saturn V Center in Florida. It featured segments from across the nation, including The National Mall in Washington, NASA’s Johnson Space Center in Houston, Neil Armstrong’s hometown of Wapakoneta, Ohio, and the Apollo 11 command module on display at the Museum of Flight in Seattle.

Stephanie Martin, left, NASA Office of Communications, and Nilufar Ramji, NASA Office of STEM Engagement, host a live broadcast of “STEM Forward to the Moon” on July 19, 2019 from Kennedy Space Center’s Apollo/Saturn V Center in Florida. The special program featured kids participating in Moon landing simulations at four museums throughout the country: Cosmosphere in Hutchinson, Kansas; Saint Louis Science Center; Columbia Memorial Space Center in Downey, California; and Arizona Science Center in Phoenix.

Astronaut Stan Love speaks at Kennedy Space Center’s Apollo/Saturn V Center on Friday, July 19, 2019. Love addressed a crowd at the Florida spaceport during a 50th Anniversary celebration of the Apollo 11 mission. The U.S. Postal Service issued two forever stamps to honor the historic moment. The event marked the first day of issue for the special stamps.

Derrol Nail, left, and Marie Lewis, NASA Office of Communications, host a special Apollo 11 show titled “NASA’s Giant Leaps: Past and Future” on July 19, 2019. The show, which honored the heroes of Apollo and examined NASA’s future plans, was broadcast live from Kennedy Space Center’s Apollo/Saturn V Center in Florida. It featured segments from across the nation, including The National Mall in Washington, NASA’s Johnson Space Center in Houston, Neil Armstrong’s hometown of Wapakoneta, Ohio, and the Apollo 11 command module on display at the Museum of Flight in Seattle.

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, NASA's Deputy Director for Planetary Science, Jim Adams speaks to the audience after the unveiling of the two new stamps that commemorate the 50th anniversary of human spaceflight designed by the United States Postal Service. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

United States Postal Service Vice President of Finance Steve Masse, left, and NASA Mercury Astronaut Scott Carpenter, unveil two USPS stamps to commemorate and celebrate 50 years of US Spaceflight and the MESSENGER program during an event, Wednesday, May 4, 2011 at the NASA Kennedy Space Center in Cape Canaveral, Fla. One stamp commemorates NASA’s Project Mercury, America’s first manned spaceflight program, and NASA astronaut Alan Shepard’s historic flight on May 5, 1961, aboard spacecraft Freedom 7. The other stamp draws attention to NASA’s unmanned MESSENGER mission, a scientific investigation of the planet Mercury. On March 17, 2011, MESSENGER became the first spacecraft to enter into orbit around Mercury. Photo Credit: (NASA/Bill Ingalls)

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, United States Postal Service official Steve Massey and Mercury Astronaut Scott Carpenter have the honor of unveiling the two new stamps that commemorate the 50th anniversary of human spaceflight. Applauding the unveiling is NASA Administrator, Charlie Bolden. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, Mercury Astronaut Scott Carpenter, NASA Administrator Charlie Bolden, Julie Jenkins, daughter of Mercury Astronaut Alan Shepard, and NASA's Deputy Director for Planetary Science, Jim Adams, enjoy a light moment during an event unveiling two new stamps to commemorate the 50th anniversary of human spaceflight from the United States Postal Service. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

S71-43785 (2 Aug. 1971) --- Astronaut David R. Scott, Apollo 15 commander, performs the act of cancelling the first Apollo 15 commemorative postage stamp on the moon, as seen in this color reproduction taken from a transmission made by the RCA color television camera mounted on the Lunar Roving Vehicle. Scott holds a stamp cancellation device in his right hand. The new commemorative postage stamp heralds: "United States in Space -- A Decade of Achievement." The U.S. Postal Service chose artist Robert McCall of Paradise Valley, Arizona, to design the new U.S. eight-cent stamp. The stamp cancellation occurred toward the end of the third and final lunar surface extravehicular activity by astronauts Scott and James B. Irwin, lunar module pilot.

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, NASA Administrator Charlie Bolden speaks to the audience in attendance for the United States Postal Service unveiling of two new stamps to commemorate the 50th anniversary of human spaceflight. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, NASA's Deputy Director for Planetary Science, Jim Adams speaks to the audience in attendance for the United States Postal Service unveiling of two new stamps that commemorates the 50th anniversary of human spaceflight. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, Mercury Astronaut Scott Carpenter addresses the audience during an event unveiling two new stamps to commemorate the 50th anniversary of human spaceflight from the United States Postal Service. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, Center Director Bob Cabana addresses the audience to announce the United States Postal Service unveiling of two new stamps to commemorate the 50th anniversary of human spaceflight. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, United States Postal Service official Steve Massey and Mercury Astronaut Scott Carpenter shake hands after unveiling the two new stamps that commemorate the 50th anniversary of human spaceflight. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Rocket Garden at NASA's Kennedy Space Center Visitor Complex in Florida, Laura Churchley (left), Alice Wackerman and Julie Jenkins, daughters of Mercury Astronaut Alan Shepard, applaud during an event unveiling two new stamps to commemorate the 50th anniversary of human spaceflight from the United States Postal Service. One stamp commemorates NASA's Project Mercury and Alan Shepard's historic launch on May 5, 1961, aboard the spacecraft Freedom 7. The second stamp honors NASA's MESSENGER, which reached Mercury in March to become the first spacecraft to orbit the planet. The two missions frame a remarkable 50-year period in which America advanced space exploration through more than 1,500 crewed and uncrewed flights. Photo credit: NASA/Kim Shiflett

From left, NASA Deputy Director, Planetary Science Division, Science Mission Directorate, Jim Adams, NASA Kennedy Space Center Director of Education and External Relations Cheryl Hurst, United States Postal Service Vice President of Finance Steve Masse, NASA Mercury Astronaut Scott Carpenter, NASA Administrator Charles Boldin, Daughters of NASA astronaut Alan Shepard, Alice Wackermann, Laura Shepard Churchley, and Julie Jenkins, and NASA Kennedy Space Center Director Robert Cabana pose for a photograph during an unveiling ceremony of two USPS stamps that commemorate and celebrate 50 years of US Spaceflight and the MESSENGER program during an event, Wednesday, May 4, 2011 at the NASA Kennedy Space Center in Cape Canaveral, Fla. One stamp commemorates NASA’s Project Mercury, America’s first manned spaceflight program, and NASA astronaut Alan Shepard’s historic flight on May 5, 1961, aboard spacecraft Freedom 7. The other stamp draws attention to NASA’s unmanned MESSENGER mission, a scientific investigation of the planet Mercury. On March 17, 2011, MESSENGER became the first spacecraft to enter into orbit around Mercury. Photo Credit: (NASA/Bill Ingalls)