A so-called cosmic tsunami is rousing a galaxy cluster affectionately nicknamed Sausage, suggesting that stagnant galaxies can be rejuvenated when galactic clusters collide.
See just how well Hubble is doing after 25 years in orbit.
September is a perfect time to help astronomers educate the public (and themselves) about the universe.
Mercury and Pluto features were among the places the public helped name in the past year -- where else can we (officially) leave our cosmic mark?
A study of more than 200,000 galaxies shows that the universe is producing half as much energy as it did 2 billion years ago and continues to fade.
A new cosmic portrait taken at an observatory in Chile reveals a cluster of blue and white stars.
Astronomers may have solved the decades-long cosmic murder mystery of what kills most galaxies in the universe: They are strangled to death, so they can no longer create new stars.
A galaxy far, far away — farther, in fact, than any other known galaxy — has been measured by astronomers.
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