NASA's nearly 12-year-old CloudSat satellite has exited the Afternoon Constellation, or A-Train, of Earth monitoring satellites, but its science mission will continue.
NASA has sent lots of missions to Mars, but InSight will stand apart in a number of ways.
This animation blinks between two images taken nearly a decade apart of the 2008 landing site of NASA's Mars Phoenix mission, showing that dust has obscured landing marks.
NASA's Mars Reconnaissance Orbiter, at Mars since 2006, put itself into a precautionary standby mode on Feb. 15 in response to sensing an unexpectedly low battery voltage.
NASA's Mars Exploration Rover Opportunity keeps providing surprises about the Red Planet, most recently with observations of possible "rock stripes."
The Sun will rise on NASA's solar-powered Mars rover Opportunity for the 5,000th time on Saturday, sending rays of energy to a robot that continues to provide revelations.
Farewell to TES, the first instrument to monitor tropospheric ozone from space.