We can't change when or how long we live. All that really counts is what we do. Space exploration has technical, political and mental challenges, but rewards us with surprising knowledge. It's one of humanity's noblest endeavors and the focus of my work since 1987.

Author Stories
Jul 6, 2015 11:32 AM ET
Good news: NASA’s Pluto-bound New Horizons spacecraft should be back collecting science data Tuesday, with no impact to next week’s planned flyby.
Jul 6, 2015 08:01 PM ET
Ground control teams plans to dispatch a final set of computer commands to NASA's New Horizons spacecraft on Tuesday, returning it to science operations that will last throughout next week's close encounter with unexplored Pluto.
Jul 5, 2015 07:44 AM ET
The probe is expected to recover in one to several days, according to NASA.
Jul 1, 2015 01:00 PM ET
Scientists have found gigantic sinkholes more than 200 yards (183 meters) in diameter -- twice the length of a football field -- and just about as deep breaking the surface of the comet being studied by the orbiting Rosetta spacecraft.
Jun 30, 2015 05:30 PM ET
Like many rocket launch companies, SpaceX learned some its most valuable lessons from the school of hard knocks before nailing an impressive string of 18 successful Falcon 9 missions.
Jun 29, 2015 11:35 AM ET
SpaceX has been testing a launch abort system that would save the lives of the crew on board a manned version of its Dragon capsule in the event of a launch failure.
Jun 27, 2015 09:00 PM ET
On Sunday, SpaceX hopes to land a Falcon 9 rocket after delivering its payload to space -- but this isn't the only rocket return game in town.
Jun 25, 2015 05:47 PM ET
A planet about the size of Neptune but situated 33 times closer to its parent star than Earth orbits the sun is losing its atmosphere, forming a fat, comet-like tail in the process.
+ Load More