An odd galaxy called NGC 1277 doesn't appear to have evolved much in the past 10 billion years, a new study based on Hubble Space Telescope observations reports.
Stars are giant, luminous spheres of plasma. Galaxies consist of stars, stellar remnants, dust, gas, and dark matter, bound together by gravity. Learn more about stars and galaxies.
Mysterious cosmic signals radiating from the center of our Milky Way galaxy are actually triggered by ancient stars, rather than dark matter, a new study shows.
Two merging spiral galaxies are caught twisting each other into cosmic knots in a spectacular photo by NASA's Hubble Space Telescope.
Some of the most monstrous black holes in the universe are growing faster than their host galaxies, new research suggests.
The superdense corpse of a once-massive star roared back to life, briefly, by feasting on its dying companion, a new study suggests.
A newfound star in a nearby galaxy appears to have cheated death by blowing up at least twice as a supernova. It could be a throwback to the first stars that ever formed.
Stars were lighting up the universe by just 180 million years after the Big Bang, a new study reports.
Supermassive black holes near the center of our Milky Way galaxy may have transformed "mini-Neptune" exoplanets into rocky "super-Earths," new research shows.
Recent Hubble Space Telescope findings suggest that the universe is expanding much faster than expected — and astronomers say the rules of physics may need to be rewritten to understand why.
An amateur astronomer testing out a new camera just happened to catch the first light emitted by a supernova — a dramatic event that professional astronomers had long wanted to see.
The sun may be dimming, temporarily. Don't panic; Earth is not going to freeze over. But will the resulting cooling put a dent in the global warming trend?
Fans of the Horsehead and Crab nebulas, take note: There's another giant galactic animal on the scene.
An incredible photo from the Hubble Space Telescope showcases an enormous galaxy cluster that weighs in at a whopping 3 million billion suns.