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New catalog of visible Milky Way charts 219 million stars
Astronomers spent 10 years charting stars brighter than 20th magnitude – that's about 1 million times fainter than can be seen with the human eye.
September 16, 2014
ESA announces landing site on Rosetta’s comet
Rosetta spacecraft has been moving in tandem with its comet since August. On Monday, ESA announced the site of a November landing.
September 15, 2014
First evidence for water-ice clouds outside our solar system
The first evidence for water-ice clouds on an object beyond our solar system. It's a brown dwarf, one of our closest neighbors, only 7 light-years away.
September 12, 2014
Significant auroras predicted for tonight
Reports from NOAA and elsewhere predict a chance of significant auroras, possibly observable as far south as the northern U.S. and maybe even farther south.
September 12, 2014
Video: Jellyfish flame on the ISS
Fire in space doesn't act like fire here on Earth. Untethered by gravity, flames in space curl themselves into tiny balls.
September 11, 2014
Astronomers solve 20-year-old quasar mystery
New works suggests most observed quasar phenomena depend on two things: how efficiently a central black hole is being fed and the astronomer's viewing orientation.
September 11, 2014
Why our Milky Way galaxy has fewer satellites than expected
European cosmologists and particle physicists come together to tweak an accepted model of how cold dark matter helps build galaxies in our universe.
September 9, 2014
A preliminary map of different regions on Rosetta’s comet
The comet turns out to be a unique, multifaceted world. We now know comets can have cliffs, depressions, craters, boulders or even parallel grooves.
September 9, 2014
Moonlets are born and quickly die in Saturn’s F ring
Tiny moons, no bigger than large mountains, may coalesce and collide with the densest part of the ring, creating luminous knots. But the moons don't last long.
September 9, 2014
Small asteroid to sweep safely past Earth Sunday
Asteroid passes near Earth on September 7. At its closest (18:18 UTC / 2:18 p.m. EDT), it's about the same distance from Earth as weather and communications satellites.
September 7, 2014
