Space

Stuff They Don't Want You To Know talks to investigative filmmaker Jeremy Corbell about his alien abduction documentaries.

By Diana Brown

How galaxies get their shapes and evolve is widely debated.

By Mark Mancini & Yara Simón

It's the first interstellar rock we've ever found!

By Ian O'Neill, Ph.D.

For centuries, people have been reporting sightings of strange objects in the sky - unidentified flying objects (though UAP is the term du jour). These events continue to captivate the world.

By Diana Brown & Desiree Bowie

Does the U.S. government have proof there is life from other worlds visiting Earth?

By Mark Mancini

It wasn't quite as loud as you might imagine.

By Melanie Radzicki McManus

The term "blue moon" dates back to at least the 16th century. Since then, it's had several different definitions, many of which are contradictory. So what's a blue moon today?

By Mark Mancini

Everybody wants to find aliens, even the hacktivist group Anonymous.

By Ian O'Neill, Ph.D.

It's a bird, it's a plane, it's a supermoon! Aside from being bigger and brighter than a regular moon, does a supermoon affect anything on Earth?

By Patrick J. Kiger

The European Space Agency's Gaia satellite observatory has created a 3-D model of the Milky Way - and beyond! - that charts more than a billion stars.

By Patrick J. Kiger

European scientists are inviting gamers to become citizen scientists, sifting through real astronomical data to spot undiscovered planets orbiting other stars.

By Patrick J. Kiger

Say hello to the newly discovered TRAPPIST-1 system, which is just 39 light-years away and filled with seven Earth-like planets.

By Jonathan Strickland

The rings of Saturn, Uranus and Neptune may be remnants of smaller planets destroyed long ago by the gas giants' powerful gravity.

By Patrick J. Kiger

And solving that issue could go a long way toward making our planetary neighbor habitable.

By Jonathan Strickland

NASA's Spot the Station feature will text or email you when the ISS is about to be overhead. And you won't even need a telescope to see it!

By Laurie L. Dove

The sun's atmosphere is actually hotter than its surface, even though you'd assume the surface is what generates all that heat. How does that work?

By Patrick J. Kiger & Yara Simón

Saturn's largest moon Titan is the only other celestial body we know of that has liquid lakes on its surface. NASA has just captured some amazing footage of clouds.

By Christopher Hassiotis

Outer planets in our solar system have atmospheres made up of flammable chemicals that can cause explosions on Earth. Could a rocketship, or electric spark, ignite them?

By Patrick J. Kiger

Elton's always maintained that Mars ain't the kind of place to raise your kids. Is he right?

By Julia Layton

The space telescope's ultraviolet observations come days before the Juno space probe will arrive to orbit the gas giant's polar regions.

By Christopher Hassiotis

The annual Leonid meteor shower is back, and peaks in the late-night hours of November 17. It's made up of tiny bits of debris from the comet Tempel-Tuttle. Here's how to see it.

By Patrick J. Kiger

Neither massive planets nor tiny stars, brown dwarfs are entirely different substellar curiosities that possess qualities of both.

By Ian O'Neill, Ph.D.

Precipitation does fall from the clouds of other planets, but it's a little more exotic than the rainwater we get here on Earth. Imagine sheets of methane, sulfuric acid and, yes, diamonds falling from the sky.

By Alison Cooper

Surely nuclear weapons, which can obliterate entire cities, contain enough destructive power to blow a giant space rock to bits, right? What does NASA make of the whole explosive business?

By Caitlin Uttley

Whether we head there to mine some helium-3 or take the first steps in expanding humanity's reach into the solar system, we want to go to the moon -- permanently. When's that going to happen?

By Robert Lamb