Astronaut Serena Auñón-Chancellor examines her eye with a Funduscope. http://www.nasa.gov/sites/default/files/thumbnails/image/iss056e096896_0.jpg

Just over a month into its mission, NASA's Parker Solar Probe has returned first-light data from each of its four instrument suites. These early observations show that each of the instruments is working well. http://www.nasa.gov/sites/default/files/thumbnails/image/01_wispr-crop.png

In the northern constellation of Coma Berenices lies the impressive Coma Cluster — a structure of over a thousand galaxies bound together by gravity. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1838a.jpg

John W. Young (1930-2018), born on Sept. 24, was NASA's longest-serving astronaut and the only astronaut to fly missions in the Gemini, Apollo and Space Shuttle Programs. http://www.nasa.gov/sites/default/files/images/561110main_s65-19228_full.jpg

NASA's Solar Dynamics Observatory views our Sun in ten different wavelengths because each wavelength reveals different solar features. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22724.jpg

NASA still hasn't heard from the Opportunity rover, but at least we can see it again. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22549-16.jpg

During National Hispanic Heritage Month, we're celebrating the contributions of the brilliant Hispanic women and men of NASA. In this Feb. 2007 photo, astronaut Michael E. Lopez-Alegria, Expedition 14 commander, participates in a 6-hour, 40-minute spacewalk as construction continues on the International Space Station. http://www.nasa.gov/sites/default/files/thumbnails/image/iss014e13416_large.jpg

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