This Aug. 5 1968 image was taken aboard the MV Retriever in the Gulf of Mexico, where the Apollo 7 crew, Walter Schirra, Walter Cunningham and Donn Eisele practiced water egress procedures in preparation for the October 1968 mission. http://www.nasa.gov/sites/default/files/thumbnails/image/s68-46603.jpg

Aeronautics, the first A of the NASA acronym, has always been a part of the agency. http://www.nasa.gov/sites/default/files/thumbnails/image/9458072623_5c6cf2fa3f_o.jpg

International Space Station astronaut and former teacher Ricky Arnold works with a student-designed experiment using NanoRacks commercial science hardware. http://www.nasa.gov/sites/default/files/thumbnails/image/43010056595_3fc589b92d_k.jpg

International Space Station Commander Alexander Gerst has a better view of our home planet than most. http://www.nasa.gov/sites/default/files/thumbnails/image/45025340661_7b9f8f9402_k.jpg

The landing jets fire as the Soyuz MS-08 spacecraft lands with Drew Feustel, Ricky Arnold and Oleg Artemyev, members of the Expedition 55 and 56 crews onboard the International Space Station. http://www.nasa.gov/sites/default/files/thumbnails/image/30157908867_e926f3f976_k.jpg

During National Hispanic Heritage Month, we're celebrating the contributions of the brilliant Hispanic women and men of NASA. In this image, astronaut Joe Acaba installs botany gear for the International Space Station's Veggie facility, to demonstrate plant growth in space. http://www.nasa.gov/sites/default/files/thumbnails/image/iss053e047057.jpg

The Soyuz rocket is rolled out by train to the launch pad, Tuesday, Oct. 9, 2018, for the Expedition 57 launch. http://www.nasa.gov/sites/default/files/thumbnails/image/45148993582_80201c27e8_k.jpg

This composite image shows the International Space Station, with a crew of three onboard, in silhouette as it transits the Sun at roughly five miles per second, Sunday, Oct. 7, 2018. http://www.nasa.gov/sites/default/files/thumbnails/image/31328177238_0dd426dd63_o.jpg

Cosmonaut Alexey Ovchinin of Roscosmos, left, and astronaut Nick Hague of NASA, right. embrace their families after landing at the Krayniy Airport. http://www.nasa.gov/sites/default/files/thumbnails/image/nhq201810110007.jpg

This view of southern California was taken by the Apollo 7 crew during their 18th revolution of the Earth on Oct. 12, 1968. http://www.nasa.gov/sites/default/files/thumbnails/image/as07-11-2022.jpg

During National Hispanic Heritage Month, we're celebrating the achievements of astronaut Ellen Ochoa and other Hispanic astronauts and professionals at NASA. Floating upside down and reading a checklist may not be how most of us perform the day's work, but it was for Ochoa on Space Shuttle Discovery's STS-96 mission. http://www.nasa.gov/sites/default/files/thumbnails/image/29863224741_73930ea3e4_k.jpg

This artist’s conception of the core of Cygnus A shows the dusty donut-shaped surroundings, called a torus, and jets launching from its center. http://www.nasa.gov/sites/default/files/thumbnails/image/coreofcygnusa_fnl_lynettecook_cf_0.jpg

On Oct. 18, 1989, space shuttle Atlantis deployed NASA's Galileo spacecraft six hours, 30 minutes into the STS-34 mission. Galileo arrived at Jupiter in December, 1995 and spent eight years in orbit around the gas giant, becoming the first spacecraft to orbit an outer planet. http://www.nasa.gov/sites/default/files/thumbnails/image/s34-71-00r.jpg

This glittering ball of stars is the globular cluster NGC 1898, which lies toward the center of the Large Magellanic Cloud. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1840a.jpg

On October 22, 1968, 50 years ago, the Apollo 7 crew splashed down in the Gulf of Mexico. http://www.nasa.gov/sites/default/files/thumbnails/image/s68-52542.jpg

Newborn Stars Blow Bubbles in the Cat's Paw Nebula http://www.nasa.gov/sites/default/files/thumbnails/image/cats-paw-16.jpg

On Sept. 25, 2018, Parker Solar Probe captured a view of Earth as it sped toward the first Venus gravity assist of the mission. Earth is the bright, round object visible in the right side of this image. http://www.nasa.gov/sites/default/files/thumbnails/image/parker-view-of-earth.jpg

The ghost of Cassieopeia's ethereal glow might remind people of apparitions such as those reported by paranormal investigators. http://www.nasa.gov/sites/default/files/thumbnails/image/stsci-h-p1842a-f-4072x4133.png

It’s autumn in the Northern Hemisphere, which means many people living in mountainous areas are awakening to fog-filled valleys. http://www.nasa.gov/sites/default/files/thumbnails/image/blueridge_vir_2018297_lrg.jpg

Senator John Glenn during water survival training for the STS-95 mission at the Neutral Buoyancy Laboratory. On Oct. 29, 1998, space shuttle Discovery launched with Senator Glenn aboard, as he returned to space for the first time since his 1962 flight. http://www.nasa.gov/sites/default/files/thumbnails/image/s98-04614.jpg