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Jupiter and Venus draw closer!
The sky's two brightest planets are getting ready for a spectacular conjunction in late June and early July. Start watching them now! Charts and info here.
May 19, 2015
Video: First marathon on Mars
On Earth, a fast runner takes a few hours to complete a marathon. On Mars, it took the Opportunity rover 11 years. New short video on Opportunity's marathon trek.
May 18, 2015
Sea salt on Jupiter’s moon Europa
Europa is thought to have a subsurface ocean. Salt from this hidden sea might be emerging in long fractures visible in the moon's crust.
May 18, 2015
Origin of Antarctica’s eerie Blood Falls
New work confirms zones of liquid salt water hundreds of meters below the bright red waterfall in icy Antarctica, known as Blood Falls.
May 18, 2015
Pacific ‘blob’ is changing weather patterns
What does this year's odd U.S. weather have in common with a huge spike in hungry, stranded sea lion pups on California shores? Both are linked to a giant patch of warm ocean water.
May 18, 2015
This date in science: Dramatic space photos of Pavlof Volcano
As Pavlof Volcano poured out lava and ash, ISS astronauts managed to capture these seldom-seen oblique views of the volcano.
May 18, 2015
Do nano-sunscreens harm sea life?
Nano particles in sunscreens have been found to harm marine worms, crustaceans, algae, fish and mussels. A new study shows their negative effect on sea urchin embryos, too.
May 18, 2015
Mountain shadow on clouds
Tenerife in the Canary Islands is one of the best places in the world to look up. Here's the shadow of Roque del Conde, a landmark mountain there, cast on clouds.
May 17, 2015
Four quasars in a row
Astronomers at Keck Observatory in Hawaii have found a quartet of quasars, embedded in a giant nebula of cool, dense gas. The odds of four of them being so closely packed purely by chance is about 1 in 10 million.
May 17, 2015
Watch a moon shadow on Jupiter
This composite represents an hour of Jupiter-watching. Watch a moon shadow on Jupiter's face, and see how far the Great Red Spot moves in that time.
May 16, 2015
