PHOTO GALLERIES
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ASTRONOMY
A NASA astronaut heard a mysterious “pulsing noise” inside Boeing’s Starliner. What was it?
Mission Control compared the sound to a sonar ping. Here’s what NASA says it came from.
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ASTRONOMY
What happens if a black hole comes too close to Earth? Physicists explain
Even after decades of study, black holes remain mysterious, and what lies beyond their edge is still unknown.
Massive mass anomaly detected under Moon's largest crater—what is it?
Scientists know something heavy sits far below the Moon's largest preserved crater, but they can't say for sure what it is.
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ASTRONOMY
What a U.S. intelligence officer under oath told Congress about UFOs
The testimony raised startling claims about what the U.S. government may know about unexplained objects.
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ASTRONOMY
Scientists were tracking mysterious flashes from space—they may have finally found the origin
A nearly 10-minute X-ray flash from space may reveal the origin of mysterious cosmic flashes. Here’s how.
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ASTRONOMY
Is the bizarre hexagon on Saturn alien technology? Here's what NASA's images show
Scientists have studied this six-sided pattern at Saturn's north pole for decades, and it may finally have an explanation.
5 PHOTOS
ASTRONOMY
How will the universe end? From the Big Freeze to the Big Crunch, theories you need to know
Ever wondered how the universe will end? While there's no consensus yet, there exist multiple theories on the death of the cosmos. Explore them here.
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ASTRONOMY
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ASTRONOMY
One of Webb's biggest images yet hides the lightest "failed stars" ever found
This panorama of IC 348 holds brown dwarfs with masses as low as twice Jupiter's. Here’s what makes them so surprising.
5 PHOTOS
ASTRONOMY
Apollo 10 astronauts heard an eerie sound on the far side of the Moon. What was it?
The crew wasn't sure whether they were hearing things, and they worried nobody would believe them. Here’s what happened.
Aliens or not? Harvard scientist Avi Loeb shares his thoughts on latest UFO files release
Harvard scientist and chair of the UAP Science Advisory Council to the White House, Avi Loeb, finds himself puzzled by the sixth batch of the Department of War's UFO files.
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ASTRONOMY
The curious case of the 'WTF Star': Why Tabby's Star still has scientists puzzled
From alien megastructures to a swarm of comets, all you need to know about the theories surrounding the mysterious dips in brightness observed in Tabby's Star.
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ASTRONOMY
Scientists finally captured an image of a giant black hole at the heart of our galaxy
For decades, astronomers have studied the mysterious object at the heart of the Milky Way. Now, we finally have a closer look.
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ASTRONOMY
SpaceX shares stunning new photos of Flight 14, Starship’s debut orbital mission
SpaceX has shared new photos of the Starship rocket which lifted off on its debut orbital flight on September 28.
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SPACEFLIGHT
Is there a hidden ninth planet beyond Pluto? Here’s what scientists found
Strange orbits in the distant solar system have led astronomers to wonder whether there’s a ninth planet waiting to be found.
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ASTRONOMY
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ASTRONOMY
Unexplained lights keep appearing in this Norwegian valley. Is it a UFO or something else?
For decades, residents of Norway’s Hessdalen valley have reported strange lights that seem to appear without warning and behave unlike ordinary lights.
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ASTRONOMY
NASA lost the original Apollo 11 moon landing tapes, and here's how it happened
Millions watched humanity take its first steps on the Moon, but NASA had an even clearer version of the historic footage. Here’s what happened to the tapes.
SpaceX Starship Flight 14: Striking images from the rocket's first orbital mission
Images from SpaceX's high-stakes Starship test, the first to reach orbit and deploy 26 Starlink V3 satellites.
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SPACEFLIGHT
Unsettling theories that could change how we see the universe
There are still countless things we don't understand about the universe, and some possible explanations are downright unsettling. Here’s a look at a few of them.
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ASTRONOMY
A former NASA scientist says he's found a way to beat gravity. Here's how
Every rocket ever built has had to fight gravity by burning fuel. A former NASA scientist says he may have found a way around it.
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ASTRONOMY
Could our ancestors actually be aliens? Scientists are taking the idea seriously
Some scientists believe the raw ingredients for life didn't originate on Earth at all, but arrived from deep space. Here’s why.
5 PHOTOS
ASTRONOMY