T is for Tracking and Data Relay Satellite (TDRS).
U is for Universe.
V is for Velocity.
On Oct. 19, 2017, the Moon photobombed NASA’s Solar Dynamics Observatory, or SDO, when it crossed the spacecraft’s view of…
Agricultural fires in the Punjab state of India form a large cluster in this satellite image taken by Suomi NPP.
APOD Science APOD APOD: 2017 October 20 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss …
W is for Wavelength.
X is for X-Ray.
Astronaut Joe Acaba (foreground) assisted crewmates Randy Bresnik (right) and Mark Vande Hei before they began a spacewalk on Oct.…
Y is for Yagi Antenna.
