The shadowy entities are about 10,000 to 100,000 times smaller than the dark matter halo of the Milky Way.
Unlike ʻOumuamua, the first interstellar object ever detected, comet 2I/Borisov is radiant and gassy.
Hippocamp may have been forged by the fallout of an impact billions of years ago.
A new study suggests that the Jupiter-sized planet Kepler-1625b may host a Neptune-sized moon.
A close-up view of one of the night sky’s most spectacular features.
The Hubble Space Telescope is filling out its gallery of distant Messier objects.
Watch alien planets evaporate and black holes lurk in this motherlode of videos.
The movie “Pitch Black,” come to life.
The agency will hold the press conference in Washington at 2 PM EST.
Experience a 'Fistful of Stars' in Eliza McNitt's soothing and operatic educational space odyssey, premiering today at SXSW.
Watch an astrophysicist's talk on the telescope from the Perimeter Institute.
The results of a new study are close, but slightly faster than, the generally accepted rate.