NASA Apollo 10 Astronaut Gene Cernan explains how wonderful the Earth looked from the Moon during a Newseum TV program celebrating the 40th anniversary of Apollo 10, Monday, May 18, 2009, in Washington. Photo Credit (NASA/Bill Ingalls)

NASA Apollo 10 Astronaut Gene Cernan explains the importance of the nations space program for future generations during a Newseum TV program celebrating the 40th anniversary of Apollo 10, Monday, May 18, 2009, in Washington. Photo Credit (NASA/Bill Ingalls)

In this image made inside the TV production studio of the Newseum, NASA Apollo 10 Astronaut Gene Cernan, right monitor, answers questions from the Newseum's distinguished journalist-in-residence, Nick Clooney, left monitor, during a Newseum TV program celebrating the 40th anniversary of Apollo 10, Monday, May 18, 2009, in Washington. Photo Credit (NASA/Bill Ingalls)

NASA Apollo 10 Astronaut Gene Cernan, on stage, right, and the Newseum's distinguished journalist-in-residence, Nick Clooney, on stage, left, talk with a Stan LeBar, Program Manager of the Apollo TV Lunar Camera who helped see that Apollo 10 was the first mission to broadcast in color from the moon during a Newseum TV program celebrating the 40th anniversary of Apollo 10, Monday, May 18, 2009, in Washington. Photo Credit (NASA/Bill Ingalls)

This composite image of seven pictures shows the progression of a partial solar eclipse near from Ross Lake, Northern Cascades National Park, Washington on Monday, Aug. 21, 2017. The second to the last frame shows the International Space Station, with a crew of six onboard, in silhouette as it transits the Sun at roughly five miles per second. A total solar eclipse swept across a narrow portion of the contiguous United States from Lincoln Beach, Oregon to Charleston, South Carolina. A partial solar eclipse was visible across the entire North American continent along with parts of South America, Africa, and Europe. Photo Credit: (NASA/Bill Ingalls)

The President’s limousine also know as "the beast," is seen in front of Air Force One after President Donald Trump arrived at the Launch and Landing Facility at NASA’s Kennedy Space Center ahead of SpaceX’s Demo-2 mission, Saturday, May 30, 2020, in Florida. NASA’s SpaceX Demo-2 mission is the first launch with astronauts of the SpaceX Crew Dragon spacecraft and Falcon 9 rocket to the International Space Station as part of the agency’s Commercial Crew Program. The test flight serves as an end-to-end demonstration of SpaceX’s crew transportation system. Behnken and Hurley are scheduled to launch at 3:22 p.m. EDT on Saturday, May 30, from Launch Complex 39A at the Kennedy Space Center. A new era of human spaceflight is set to begin as American astronauts once again launch on an American rocket from American soil to low-Earth orbit for the first time since the conclusion of the Space Shuttle Program in 2011. Photo Credit: (NASA/Bill Ingalls)