An uncharted region of space known as the "zone of avoidance" lurks behind the Milky Way's center – and astronomers just found an enormous, multi-galaxy structure there.
The U.S. government has officially started to explain some of the most infamous UFO encounters of the last decade, with China and weather balloons as top offenders.
A partial solar eclipse on Oct. 25 looked like an epic ring of fire when viewed by the Hinode satellite, new footage reveals.
A recent report about pitch-black "phantom" UFOs in the skies over Ukraine has been discredited by Ukrainian scientists and by Harvard astrophysicist Avi Loeb.
A monster merger between two black holes sent ripples through time and space, and may prove Einstein right about a gravitational phenomenon called precession.
When large asteroids hit the Earth, they trigger mass extinctions and climate chaos. But could an asteroid destroy the planet entirely?
New research suggests that a strange 'ripple' is causing the Milky Way's stars to vibrate out of step, and an ancient collision with Sagittarius may be to blame.
Astronomers are using the James Webb Space Telescope to look back in time. How is this possible? It's just the nature of light, according to NASA.
The U.S. Navy admitted that it has unreleased videos of UFO encounters but refused to share them due to 'national security concerns.'
Dozens of 'phantom' and 'cosmic' UFOs have been detected in the skies over Ukraine, a new government report claims.
Could a solar storm ever destroy Earth? According to scientists, there's no evidence that any solar weather has ever harmed a human.
A massive sinkhole measuring more than 100 feet across has opened on mining land in Chile, according to the government's geology mining service.
Scientists detected the most powerful gigantic jet lightning bolt — a lightning bolt that shoots up out of a cloud into the ionosphere — ever.
A surprise solar storm bashed Earth on Aug. 7 and 8, triggering an appearance of the mysterious glowing phenomenon called STEVE.
NASA astronomers discovered that a large asteroid would zoom past Earth on Aug. 4, missing our planet by millions of miles.
Two asteroids, 2016 CZ31 and 2013 CU83, are headed toward Earth for back-to-back flybys this weekend.
On July 12, NASA revealed the deepest image of the universe ever taken, courtesy of the James Webb Space Telescope. But what's really happening in this historic image?
Researchers found that streams of cold gas could create 'seeds' of quasars — ultraluminous supermassive black holes — in the early universe, solving a decades-old mystery.
A new image from NASA's HIRISE camera reveals strange 'polygons' cracking open the surface of Mars. It's just a typical sign of spring, scientists say.
New footage shows the mysterious auroral phenomenon called STEVE emerging from a blood-red arc of light in New Zealand in 2015.
Astronomers have peered into the center of the Milky Way and discovered what appears to be a miniature spiral galaxy, swirling around a single large star.
Researchers have published the most detailed map of Antarctica's frigid Southern Ocean to date, including the ocean's new deepest point, the "Factorian Deep."
New research calculates the odds that humans will contact a 'malicious' alien civilization that wants to invade our planet. Don't worry, the chances are incredibly small.