A New Study Challenges Assumptions About the Origins of Earth's Water

Water, water everywhere, but how on Earth did it get here? Many scientists believe that Baby Earth formed dry and was later soaked by an onslaught of extraterrestrial impacts. But a new study challenges that view, arguing that our planet has had water from the start. In fact, we have have inherited it from the tiny… »11/14/15 1:00pm11/14/15 1:00pm

An Earth-Sized Neighbor May Be the Most Important Exoplanet Yet

Astronomers have discovered a rocky, Earth-sized planet 39 light years from home—right in our cosmic backyard. With a surface temperature of 440 degrees Fahrenheit, GJ 1132b is more of an intergalactic furnace than a vacation prospect. Yet some are hailing it “the most important planet ever found outside our solar… »11/11/15 1:00pm11/11/15 1:00pm

Beautiful New Topographical Map Of Ceres Shows a Complex, Icy World 

NASA has just released a stunning new topographic map of Ceres, the other dwarf planet astronomers are getting to study up close and personal this summer. Unlike Pluto’s freakishly smooth and youthful surface, Ceres’s exterior is riddled with craters, creating a battered old landscape of peaks and valleys. »7/28/15 4:00pm7/28/15 4:00pm

Why It'll Take New Horizons 16 Months to Send Us This Week's Data

Early this morning, NASA rolled out the highest-resolution image of Pluto to date, taken 16 hours before today’s historic flyby. Tomorrow, we’ll receive a new set of images at a resolution ten times higher. And Pluto Christmas is just getting started, because it’s going to take NASA 16 full months to download all the… »7/14/15 7:40pm7/14/15 7:40pm

First Signs Of Geology Spotted On Pluto's Surface

We’re so close to Pluto, we’re starting to see geologic features on the dwarf planet’s surface. In its latest portrait from the New Horizons spacecraft, scientists are able to pick out distant surface formations, including a polygonal band of terrain stretching east-northeast across the planet, and a dark band near… »7/10/15 7:05pm7/10/15 7:05pm