Mars Exploration Rover NASA's twin rovers, named Spirit and Opportunity, launched separately in 2003 and landed three weeks apart in January 2004. They made important discoveries about wet environments on ancient Mars that may have been favorable for supporting microbial life. Although Spirit ceased communicating with Earth in March 2010, Opportunity continues its work on the Red Planet.
The Apollo 11 moon landing required two spacecraft- The lunar module (LM) and command service module (CSM). Once in lunar orbit, the two would separate so the LM could land while the CSM waited in orbit. After launching from the lunar surface, the LM’s ascent stage would rendezvous and dock with the waiting CSM, then the astronauts would transfer back into the main spacecraft and head home. It sounds nearly impossible but that’s the way it was July 20, 1969.
InSight, short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, is a robotic lander designed to study the deep interior of the planet Mars. InSight launched on May 5, 2018 and successfully landed on Mars on Nov. 26, 2018.
Its finding are expected to shed light on the processes responsible for the formation of Mars, Earth, and even rocky exoplanets more than 4 billion years ago.
Was the third NASA orbiter to be built. It first launched August 30, 1984 and remained in service for more than 27 years. Among its many accomplishments was the work done on the International Space Station and carrying the Hubble Space Telescope into orbit.