PHOTO GALLERIES
5 PHOTOS
DEEP SKY OBJECTS
Harvard scientist Avi Loeb says aliens are already here. But why haven't we found any?
Avi Loeb says aliens might have had plenty of time to develop technology that is beyond our understanding. But we might still be able to detect them.
5 PHOTOS
ASTRONOMY
Is that a ‘bear’ on Mars? NASA spotted something that looks oddly familiar
NASA captured an unusual formation on Mars that seems almost too familiar to be real. Here’s what it is.
These are the only photos ever taken from the surface of Venus
Only four spacecraft have ever survived long enough to send back pictures from Venus's surface. Here's a look at the images.
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ASTRONOMY
The mysterious Wow! Signal may finally have an explanation, and it's not aliens
For decades, the Wow! Signal was one of space's biggest unsolved mysteries, but researchers say they may have finally found the source.
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ASTRONOMY
Two men 'psychically probed' Jupiter before any spacecraft got there, and the CIA has proof
In 1973, two men mentally traveled to Jupiter before NASA’s Pioneer 10 probe reached the planet. Here's how much of their claim is actually true.
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ASTRONOMY
From triumphs to tragedies: What NASA looked like in the 1980s
NASA entered the 1980s with big ambitions for space exploration, but the decade also brought some of its darkest moments.
11 PHOTOS
ASTRONOMY
What if dark matter is just hiding in another dimension? Here’s what a new study says
A new study suggests dark matter has been quietly hiding in a dimension we can't perceive. Here’s how.
5 PHOTOS
ASTRONOMY
21 PHOTOS
ASTRONOMY
20 photos that changed space history forever
History was made in space, and these unforgettable photos captured the moments that changed how we see our place in the universe.
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ASTRONOMY
Curiosity images mysterious 'pits' on Martian soil: What does NASA have to say about them?
Pits on the Martian surface are not uncommon, but the ones Curiosity imaged between its 4988th and 4994th mission days are unlike anything seen before.
The Sun's most detailed images yet reveal whirlpools never spotted before
Getting a clearer look at the Sun’s surface has always been key to understanding it. Now, scientists have their clearest view yet.
5 PHOTOS
ASTRONOMY
Scientists say the universe could tear itself apart. Here's how
What if the universe doesn’t simply fade into nothing, but literally starts coming apart? That’s the eerie premise of the Big Rip.
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ASTRONOMY
The Golden Record: When humanity sent a message specifically for aliens
Nearly 50 years ago, NASA launched two probes with a message for aliens. That message is yet to find its recipients.
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SPACEFLIGHT
20 unforgettable photos from humanity’s first Moon landing
Apollo 11 was more than a mission to the Moon. It was the moment humanity went farther than it ever had before.
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SPACEFLIGHT
Nobel Prize winner now questions the standard model of the universe, says it might be wrong
Adam Riess was awarded the Nobel Prize for his work supporting the “standard model of cosmology.” Now he says it might not be entirely correct.
5 PHOTOS
ASTRONOMY
5 PHOTOS
ASTRONOMY
Strange repeating radio signal from deep space case finally cracked; Here's what it is
Astronomers just found what's behind a mysterious signal pulsing from deep space.
5 PHOTOS
ASTRONOMY
Is the 'empty' space in our universe really empty? Here's what a new study found
For decades, physicists believed empty space was truly nothing. A new discovery says otherwise.
Could we ever reach a parallel universe? Here's what physicists really think
Physicists like Brian Greene, Michio Kaku, and Neil deGrasse Tyson have proposed theories for how they might actually exist.
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ASTRONOMY
A 'skull' rock on Mars? The eerie formation NASA can't yet explain
Perseverance found this rock sitting in a place it doesn't belong, and NASA has a theory why.
5 PHOTOS
ASTRONOMY
Did our universe begin inside a quantum multiverse? One physicist thinks so
Before inflation, our universe was every possibility at once. Here's what a physicist thinks happened next.
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ASTRONOMY
330 million light-years of darkness: The mystery of The Great Nothing—the Boötes Void
When astronomers look at the night sky, the expect to see thousands of galaxies. But there exists a 330-million-light-year patch of near nothingness. Here's all about the Boötes Void.
5 PHOTOS
DEEP SKY OBJECTS