Contributor

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
Aug 31, 2015 04:25 PM ET
After a successful flyby of Pluto in July, NASA’s New Horizons spacecraft will be redirected to visit a small, icy body known as 2014 MU69, located nearly a billion miles farther into the Kuiper Belt region beyond Neptune.
Aug 24, 2015 11:30 AM ET
Volcanic 'fire fountains' erupting from the lunar surface, similar to what occurs in Iceland today, most likely were fueled by carbon monoxide gas, a new study shows.
Aug 24, 2015 08:09 PM ET
A Japanese cargo ship that arrived on Monday at the space station delivered an astrophysics telescope that will join the flagship Alpha Magnetic Spectrometer in hunting for cosmic rays.
Aug 21, 2015 06:30 PM ET
Ten years after Katrina, NASA is building a network of mini-satellites that will unveil hurricanes' deadly power.
Aug 19, 2015 01:00 PM ET
Scientists have long puzzled over how gas planets like Jupiter and Saturn got to be so big -- now they think pebbles may be the answer.
Aug 12, 2015 05:30 PM ET
On Aug. 13, Comet 67P/Churyumov-Gerasimenko will reach perihelion, and with it the orbiting European Rosetta mission. Here's a brief rundown of Rosetta's observations of the icy body in the run-up to its day in the sun.
Aug 10, 2015 04:00 PM ET
A study of more than 200,000 galaxies shows that the universe is producing half as much energy as it did 2 billion years ago and continues to fade.
Aug 6, 2015 07:00 AM ET
Scientists are meeting this week to discuss landing sites for NASA’s next Mars rover, that will look for past life and stash rocky samples for Earth-return. These are some of the landing sites under consideration.
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