Space Exploration

Space exploration is a broad topic covering many facets of deep-space and planetary science. Learn about space probes, Mars Rovers, SETI and other out-of-this-world subjects.

Learn More

Voyager 2 Goes Interstellar, Just Like Voyager 1

That means it takes nearly 17 hours for a radio signal, traveling at the speed of light from Earth, to reach Voyager 2.

Gravitational Waves Are Lifting the Veil of Cosmic Darkness

We've identified 11 different times gravitational waves have passed through Earth. Yep, we're getting good at detecting these ripples in spacetime that Einstein predicted.

Hungry 'Hot DOG' Eats Nearby Galaxies, Fattens Its Black Hole

And this hot DOG's ferocious appetite shows no signs of slowing down.

Discovered! Icy Super-Earth at Barnard's Star, Our Sun's Neighbor

But you can forget about Barnard's Star b bearing any resemblance to our planet.

Two Moon Craters Named for Apollo 8 Astronauts

Anders' Earthrise and 8 Homeward are the two moon craters recently named in honor of the 1968 Apollo 8 mission, the first NASA mission to orbit the moon.

Just Four Dimensions in the Universe, if You Believe Gravitational Waves

Maybe there aren't more dimensions beyond the four that we know and love so well.

Mysterious Fast Radio Bursts Are Starting to Pile Up

Fast radio bursts are over in less time than it takes to blink your eye. They come from way beyond the Milky Way. And astronomers can't say with certainty what causes these enigmatic bursts.

Tiny Satellite to Search Universe for Missing Matter

The tiny HaloSat probe will investigate a galactic halo of hot gas that may account for missing matter from the early universe.

How Close Can We Get to the Sun?

NASA is launching its new Parker Solar Probe and it will get closer to the sun than any other spacecraft in history. But could we actually touch the sun some day?

New NASA Satellite Is Hunting for Distant Planets

The last satellite — Kepler — discovered more than 2,300 confirmed planets. This one is expected to find even more.

Did the Apollo Missions Cause Warming on the Moon?

Scientists have used long-lost data tapes to show that Apollo astronauts probably caused the lunar surface to warm slightly during moon missions in the 1970s.

This Galaxy Doesn't Have Dark Matter, and That's Weird

It's called NGC1052-DF2, an ultra-diffuse galaxy located 65 million light-years away, and it might mean that we don't quite know how all galaxies form after all.

The Farthest Pictures From Earth Ever Taken

New Horizons takes photo from 3.79 billion miles (6.12 billion kilometers) away from Earth.

NASA's Kepler Mission Adds 100 Alien Worlds to Exoplanet Tally

The Kepler Space Telescope seeks out small habitable exoplanets that may share similar qualities to Earth.

Are Alien Worlds in TRAPPIST-1 More Habitable Than Thought?

TRAPPIST-1 is a mini version of our solar system, and astronomers have started figuring out what life on those exoplanets might be like.

Scientists Build Universe to Understand How Black Holes Kill Galaxies

Researchers threw the ingredients of the universe into a virtual box and let the known laws of physics bake a cosmic cake. The results are stunning.

Most Distant Black Hole Discovered, But Why Is It Such a Monster?

The question is, how did it get to be so big so fast?

Robotic Camera Can Scan Entire Sky in Just Three Nights

When fully operational in 2018, the Zwicky Transient Facility robotic camera will usher in the era of big data astronomy.

Monstrous Alien World Orbits Puny Red Dwarf Star

The very existence of this planetary heavyweight is puzzling astronomers.

Plutonium Shortage Could Cripple NASA's Deep Space Exploration

Despite increased production, a potential shortage of plutonium-238 fuel could jeopardize NASA's distant missions.

Gravitational Wave Detectors Discover Colliding Neutron Stars – and Uncover a Scientific Goldmine

Scientists are calling the collision they detected the "gift that will keep on giving."

Gravitational Waves Detected Again, But This Is the Best Yet

Ripples in space-time traveled 1.8 billion light-years to wash through our planet on Aug. 14. And this time not two but three detectors picked them up.

Drop the Doughnut: True Nature of Ravenous Supermassive Black Holes Revealed

It turns out that not all supermassive black holes are devouring matter at the same breakneck pace.


Recommended