Iapetus is one of the weirdest moons in the solar system, and one of its weirdest features is its prominent, equatorial mountain range. Now, Popular Science reports on a new theory as to the origins of this peculiar ridge: The mountains, researchers posit in a study recently published in arXiv, fell from spaaaaaaaace. » 4/17/14 5:55pm 4/17/14 5:55pm

Astronomers Have Found the First Earth-Sized, Habitable Zone Planet

Scientists today announced the discovery of Kepler-186f, a faraway planet that's perhaps the most Earth-like yet discovered. It's the same size as our home world, and at the right distance from its parent star to have liquid water. So, have we at last discovered Earth 2? » 4/17/14 12:05pm 4/17/14 12:05pm

The First Instagram From Space Is Of An Astronaut In A Firefly T-Shirt

Last week, NASA astronaut Steve Swanson sent the first Instagram from space. It was a selfie, naturally, taken before the ISS cupola. But what caught our eye wasn't Swanson's handsome mug or the view of Earth. It was Swanson's shirt, which features a familiar spacecraft and the words: "Shipping & Logistics: Everything's… » 4/16/14 7:20am 4/16/14 7:20am

New Evidence Suggests Pluto Has An Ocean Beneath Its Surface

Astronomers believe that Pluto and its moon were the result of two massive objects slamming into each other. The resulting gravitational dynamic may have warmed the interior of Pluto, creating an ocean comprised of liquid water. Remarkably, this underground sea could still be there. » 4/15/14 11:00am 4/15/14 11:00am