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 32 minutes ago

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 Today 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 Yesterday 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 Tuesday 11:00am

Breathtaking Illustrations Show The Splendor Of Ringed Planets

Is there any more beautiful than a ringed planet? It's like an instant signifier of an exotic, non-Earth world. And the sight of a ring floating around an entire world is one of the most poetic and astonishing vistas the universe has to offer. And luckily, some immensely talented artists have created illustrations… » 4/11/14 3:00pm 4/11/14 3:00pm

For These Five Scientists, The Deserts Of Utah Are Like Mars on Earth

In the 1960s, Apollo astronauts trained for their moon missions in Iceland. Today, members of the Mars Society's Mars Desert Research Station (MDRS) play Mars-colony in the striated deserts of Utah. » 4/11/14 11:30am 4/11/14 11:30am

Help Find The Kid (Now Adult) Who Inspired Virgin Galactic [UPDATE]

Back in 1988, Richard Branson appeared on the BBC show "Going Live!" and fielded a call from a kid named Shihan Musafer. Shihan's question: "Have you ever thought about going into space?" 26 years later, the commercial spaceline Shihan inspired is poised to launch its first flight – and Branson wants help tracking Shihan… » 4/11/14 8:20am 4/11/14 8:20am