About 500 light-years away in the constellation Cygnus lives a star, which, though smaller and redder than the sun, has a planet that may look awfully familiar.
For the first time, astronomers may have spotted a moon circling an alien planet -- though they'll probably never know for sure exactly what they've found.
Weather permitting, when you step outside Sunday evening (April 6) you have a chance to see a rendezvous of two of the brightest objects in the night sky: the moon and Jupiter.
Enjoy some of the most inspiring, beautiful and down-right stunning photos from our adventures in space this past week.
Some of Mars' lava fields may actually be massive mud flows, indicating that they weren't created by ancient volcanic activity at all.
The hunt for the hypothetical Planet X has been fruitless so far, but that doesn't mean astronomers are calling it off.
A new app from Cosmoquest puts your knowledge of Earth to the test. Continue reading →
Through a predicted celestial dance, an asteroid drifted in front of a distant star and gave astronomers an unprecedented solar system discovery.
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