New research reveals just how invisible this stuff is, even to itself.
A dwarf galaxy orbiting the Milky Way is humming with gamma rays, leading astronomers to hypothesize that it could be filled with annihilating dark matter particles.
A ring-like filament of stars wrapping around the Milky Way may actually belong to the galaxy itself, rippling above and below the relatively flat galactic plane, making it far bigger than previously thought.
The star cluster is unique since it's located thousands of light-years away from the main disc of our galaxy.
Researchers using the Hubble space telescope took advantage of a naturally occurring zoom lens in space to capture an unprecedented quadruple image of an ancient supernova.
Astronomers have detected a black hole embedded in the spiral arm of a galaxy 100 million light-years from Earth — but this isn’t any old black hole, it belongs to an extremely elusive class that may be the ‘missing link’ in black hole evolution.
Astronomers have discovered an out-of-place supermassive black hole -- 12 billion times more massive than the sun -- that inexplicably formed when the universe was less than 900 million years old.
It has long been assumed that the size of a supermassive black hole in a galaxy's core is intimately related to the number of stars that galaxy contains -- but it might not be that simple.
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