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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
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 off-kilter explosion of supergiant star
This one-minute animation shows the shock wave that is created when the core of a massive star collapses.
May 15, 2015
New Horizons’ first photos of Pluto’s smallest moons
With its close encounter with Pluto still two months away, New Horizons' powerful camera has caught a glimpse of tiny moons Kerberos and Styx!
May 14, 2015
Astronomers find dark globular clusters
They believe there's unexpected dark matter - or black holes - in the mysterious clusters orbiting the center of the giant galaxy Centaurus A.
May 14, 2015
Asteroid passes by Earth on May 14
But, contrary to some media reports, asteroid 1999 FN53 will not "skim" our planet.
May 14, 2015
An ancient magnetic field on Mercury
Near the end of its mission, the MESSENGER spacecraft revealed Mercury's magnetic field to be at least 3.7 to 3.9 billion years old, or older.
May 12, 2015
Gargantuan gas halo around Andromeda galaxy
A dark halo of gas that envelopes our neighboring Andromeda galaxy is 1,000 times more massive than previously measured and stretches halfway to the Milky Way.
May 12, 2015
