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You are there! Sunset on Mars
A beautiful new timelapse showing sunset on Mars in mid-April, 2015, from the Mars Curiosity rover.
May 10, 2015
Large sunspot group AR 2339
After a period of few to no spots, a large sunspot group emerged on May 5. It has already produced an X-flare!
May 10, 2015
Geysers on Enceladus: Curtains not jets
Researchers thought Saturn's moon Enceladus had jet-like geysers. But the jets may be optical illusions, caused by looking through a "fold" in curtain-like geysers.
May 9, 2015
Asteroids and comets seed exoplanets with water
Earth's water likely came from asteroids and/or comets. New research suggests that small bodies in distant solar systems carry water to their planets, too.
May 9, 2015
Doomed Russian spacecraft burns up over Pacific
Roscosmos said the craft "ceased to exist" over the Pacific. The final time of reentry is 9:20 p.m. CDT (02:20 UTC), with an accuracy of plus or minus 1 minute.
May 8, 2015
Mammatus clouds at sunset, over Idaho
Mammatus clouds can appear ominous. But, in a way that’s so common in nature, their dangerous aspect goes hand in hand with a magnificent beauty.
May 8, 2015
Watch octopus squeeze through tiny hole
It's just cool, that's all. Watch this 40-second video of an octopus squeezing through a tiny hole to escape a box.
May 7, 2015
Sun and moon halo
Composite image of a halo around the sun and, within 10 hours, a nearly full moon.
May 7, 2015
Atmospheric carbon dioxide hits record high
The global average concentration of the greenhouse gas surpassed 400 parts per million in March for the first time since record-keeping began.
May 6, 2015
