Sadly, the Cassini mission ends soon. We're halfway through the "Grand Finale" orbits. Only eleven and a half orbits remain until Cassini meets its fate on September 15. Here's a look at the great mission's final science orbits.
The autumn skies over Endeavour Crater remained hazy as dust from the summer storms continued to rain down, but Opportunity encountered some unexpected and serious June gloom when her right front steering wheel jammed during the walkabout atop Perseverance Valley.
Curiosity has had a busy eight weeks, driving south from the Bagnold Dunes toward Vera Rubin Ridge. The path has steepened and the rover is now rapidly climbing upward with every meter traveled. It's been a productive time for arm instruments, but the drill is still not working.
In another dynamic demonstration of what can be achieved when a team works together, Opportunity cruised to the top of Perseverance Valley, shot the moon, and drove into her 160th month of surface operations in May.
The Space Launch System and Orion won't fly until 2019, and NASA is sticking with its original plan not to include astronauts for the maiden mission. Here is a timeline of some of the programs' major twists and turns over the years.