Autumn is under way in the Northern Hemisphere, and if you are an avid sky gazer you just might have noticed signs of the season's change.
A Neptune-size planet beyond the solar system has telltale traces of water vapor in its atmosphere, making it the smallest exoplanet known to have the wet stuff yet, scientists say.
Even though Mercury is one of the brightest objects in the sky, very few observers have ever seen the planet in the night sky. That's because it never strays very far from the sun, and is usually lost in its glare.
A surprisingly massive black hole has been discovered in the core of a small, compact galaxy -- a finding that appears to be a weird cosmic contradiction.
On these late-summer evenings after the sun has set, look low in the southern sky for the classical Archer: the constellation Sagittarius.
Quasars are the brightest objects in the universe, and display a mysterious diversity in their appearance that has puzzled astronomers for more than two decades.
September's full moon will cap a trio of back-to-back supermoons for the Northern Hemisphere summer.
The red planet will soon experience the great relief of having a half-mile wide lump of icy rock just miss it on a flyby. DNews Space Producer Dr. Ian O'Neill explains just how lucky our ruddy, rocky Milky Way buddy will be.
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