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Milky Way is about half as massive as Andromeda galaxy, say astronomers
Dark matter makes up 90% of the matter in both systems, the study finds.
July 30, 2014
101 geysers on Enceladus, ice moon of Saturn
Researchers have concluded that the only plausible source for the geysers is an underground sea now known to exist beneath Enceladus' icy surface.
July 29, 2014
Mars rover set an off-world driving distance record this week
NASA’s Opportunity rover, still going after 10 years on Mars, now holds the off-Earth roving distance record with 25 miles of driving.
July 29, 2014
Pluto-bound New Horizons update
New Horizons - en route to Pluto - is currently out of hibernation for a series of engineering and navigation checks, which will continue until the end of August 2014.
July 28, 2014
Perseid meteor shower kicks off! Fireballs detected this weekend
Earth has just entered the stream of debris left behind by Comet Swift-Tuttle, the parent comet of the Perseids. Now is the time to start watching for meteors.
July 27, 2014
Can we find aliens by looking for their pollution?
Maybe some extra-terrestrials pollute their planets too.
July 25, 2014
Beauty! Best photos of July 24 moon and Venus
The sky's two brightest nighttime objects, in the east before dawn this morning.
July 25, 2014
Video: Joshua Tree nights
Shot in Joshua Tree National Park in California. Relax ... and enjoy the night sky.
July 25, 2014
Will the Andromeda galaxy someday collide with our Milky Way?
The Andromeda galaxy is approaching our Milky Way galaxy across the vastness of space. When will they collide?
July 23, 2014
Camelopardalids: Just a few centuries late in catching a good show
Remember the Camelopardalids, the meteor shower earlier this year astronomers said would be spectacular ... except it wasn't? Now, the same astronomers explain why.
July 22, 2014
