A couple times a year, the International Space Station orbit happens to align over the day/night shadow line on Earth. via NASA https://go.nasa.gov/2QgyVbF

NASA’s Green Propellant Infusion Mission, or GPIM, will prove a sustainable and efficient approach to spaceflight. via NASA https://go.nasa.gov/2Ejz6y2

When Apollo 10 launched on May 18, 1969, it was the fifth launch of the Saturn V. via NASA https://go.nasa.gov/2WO33xp

The irregular galaxy NGC 4485 shows all the signs of having been involved in a hit-and-run accident with a bypassing galaxy. Rather than destroying the galaxy, the chance encounter is spawning a new generation of stars, and presumably planets. via NASA https://go.nasa.gov/2JKUjES

Jonny Kim was selected as a member of NASA’s 2017 astronaut class, nicknamed “the Turtles.” via NASA https://go.nasa.gov/2LJ0742

On April 29 at NASA’s Kennedy Space Center in Florida, Orion’s service module moved to the lift station inside the assembly bay. via NASA https://go.nasa.gov/2WFNs2N

The waxing crescent moon is photographed just above Earth’s limb. via NASA https://go.nasa.gov/2VzrTEB

Joe Acaba was selected as an astronaut in 2004 and has logged a total of 306 days in space on three flights. via NASA https://go.nasa.gov/2LCHrTE

Ellison Onizuka was the first Asian American to fly in space. via NASA https://go.nasa.gov/2Ju6HbS

NASA’s InSight Mars Lander used its Instrument Context Camera beneath the lander’s deck to image these drifting clouds at sunset on the Red Planet. via NASA https://go.nasa.gov/2VVWMm2