Adam Carlson caught a fine photo of October’s comet, the Tsuchinshan-Atlas, named for the Chinese and South African observatories that first spotted it.
Philae's historic landing on Comet 67P in 2014 provided crucial data on the comet's surface and internal composition, despite technical setbacks. The mission revealed organic molecules and temperature ...
Earth, between sweltering Venus and frozen Mars, formed and orbits within a band where water could persist in solid, liquid, and gaseous phases. Mars had surface water, but not as much as Earth, and ...