Mars is a dry, frigid, dusty, nearly airless place. A couple of billion years ago, though, it wasn’t much different from Earth.
Mars Probe Reveals Dry Ice, Pointing to a Wetter Past
Tag Archives: probes
Mercury messenger goes into orbit
It’s taken six years and six gravity assists from three different planets to get there, but at a little after 9 P.M. Eastern time on Thursday night, NASA’s Messenger spacecraft finally settled into orbit around the small, scorched planet Mercury.