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Two planets beyond Pluto?
New calculations by astronomers in Spain and the UK suggest that not one, but two unknown planets might exist in our solar system, beyond Pluto's orbit.
January 15, 2015
See comparative sizes of ocean giants
This image shows the body size for 25 marine species, including whales, sharks, squids, and other ocean giants. Check out the little human swimmer in each row!
January 15, 2015
How to see Comet Lovejoy in January 2015, plus best photos!
How to see Comet C/2014 Q2 Lovejoy - still visible through binoculars and telescopes. Finder charts and best photos!
January 15, 2015
Success! Two men complete historic climb at Yosemite’s El Capitan
Two Americans have become the first to free-climb Yosemite National Park’s Dawn Wall, which has been called the hardest rock climb in the world.
January 15, 2015
Toxic chemical scare on International Space Station on Wednesday
An alarm indicated a possible leak of toxic ammonia. Astronauts evacuated the U.S. side of the station. Later, NASA said the problem might have been a faulty sensor.
January 14, 2015
The world’s hottest volcanos
Kilauea ranks hottest in terms of total energy. It's been erupting for decades. Meanwhile, Iceland’s Holuhraun eruption radiated the most heat for a single event.
January 14, 2015
First notable solar flare of 2015
It was an M-class flare, and it might have produced a brief communications blackout on Monday night. But no CME - coronal mass ejection - is headed our way.
January 13, 2015
Hurry! Mercury crater-naming contest ends January 15
Immortalize your favorite artist, composer, or writer! The competition to name five impact craters on Mercury closes on Thursday.
January 13, 2015
NASA’s way cool retro posters for futuristic space travel
Making future travel plans .. with an emphasis on 'future?' Check out these exoplanet travel posters from NASA.
January 13, 2015
Rare ice halo display in New Mexico
Ice halo display captured by Joshua Thomas in Red River, New Mexico on the morning of January 9, 2015.
January 13, 2015
