Remember those viral UFO videos you saw last year? The government would like you to forget them, please.
Two huge bubbles of radio energy swirling out of the Milky Way's middle could be evidence of an ancient cosmic explosion — or maybe the start of a new one.
Scientists spotted a mysterious blast of intense X-ray light flashing out of the distant Fireworks galaxy, and it's no mere supernova.
America's largest impact crater wreaked havoc on the land and water. Scientists are just beginning to understand it.
The moon may be dead, but the Apollo 11 astronauts still managed to bring extraterrestrial life back to Earth. Astronomer/alien hunter Seth Shostak explains.
There's a rebellious, half-dead star in the Little Dipper that's hellbent on escaping our galaxy — and now, astronomers have an idea why.
More than 200,000 Facebook users say they're interested in joining a raid on Nevada's infamous Area 51 air base this summer.
The biggest, oldest black holes in the universe shouldn't technically exist. A new study provides fresh evidence for the weird, "direct collapse" process that may have made them.
Biologist Eleanor Lutz's new map of the solar system shows the precise orbital paths of more than 18,000 near celestial objects.
The universe may be full of binary stars that have been exiled from their home galaxies, thanks to one star's rowdy behavior.
New York City, home to 8.6 million people and one hot duck, has perished in an apocalyptic meteor strike … in a simulation.
The odds of an atmosphere forming around an Earth-like exoplanet are even slimmer than previously thought, a new study suggests.
Here’s one explanation for why Earth’s magnetic field undergoes weird geomagnetic jerks every decade or so.
The blobs are real, they’re chock full of charged particles and they’re heading our way several times each day.
What does the speed of light look like? CalTech researchers built the world's fastest camera to find out.
On Dec. 18, 2018, a school bus-size meteor exploded over Earth with an impact energy of roughly 10 atomic bombs. But no one saw it.