In this photo provided by NASA, a view of the lower reaches of Mount Sharp is shown in a cropped image taken with a 34-millimeter Mast Camera on NASA's Curiosity rover on August 18, 2012 on Mars. (NASA via Getty Images) NASA's Curiosity rover, which has been exploring Mars since it landed to much fanfare last August, is back on active status Tuesday, after a memory glitch set the robot back. "We expect to get back to sample-analysis science by...

(NASA/JPL-Caltech/MIT/GSFC) Last year, two NASA satellites, Ebb and Flow, mapped the moon's gravity field in unprecedented detail. Higher gravity levels are shown in red, lower fields in blue in the photo above. This week, the space agency released in mission-ending dives. NASA deliberately plunged them into a lunar mountain, well away from the and other historic sites. Scientists are still poring through the last chunk of data Ebb and Flow beamed back before their demise, but we think this is...

This image provided by Bezos Expeditions shows a thrust chamber of an Apollo F-1 engine on the bottom of the Atlantic Ocean in March 2013. (AP Photo/Bezos Expeditions) LOS ANGELES -- Rusted pieces of two Apollo-era rocket engines that helped boost astronauts to the moon have been fished out of the murky depths of the Atlantic, Amazon.com CEO Jeff Bezos and NASA said Wednesday. A privately funded expedition led by Bezos raised the main engine parts during three weeks at...