Outer Space

Mysteries of Space : Instant Guide
Wanted: Astronauts for a one-way trip to Mars

Wanted: Astronauts for a one-way trip to Mars

A non-profit organization starts a global search to find candidates willing to settle on the Red Planet... indefinitely

Mysteries of Space : Instant Guide
The six volunteers of Russia's 520-day endurance mission simulation.

The perils of sleeping in space

What's it like to sleep in a windowless spaceship with five other people breathing down your neck?

NASA : Instant Guide
The moon might have a new companion if NASA has its way.

NASA's bizarre plan to drag an asteroid into the moon's orbit

Why send astronauts to a far-off asteroid when we can just bring one back?

Mysteries of Space : Instant Guide
An astronaut about to exit the International Space Station for a spacewalk: Watch out for radioactive particles!

Are cosmic rays giving astronauts Alzheimer's?

New research suggests space radiation may lead to the degeneration of astronauts' brains

NASA : Burning Question
One of the first steps taken on the moon by Neil Armstrong and Buzz Aldrin in 1969.

Did Neil Armstrong mislead the world about his 'one small step' line?

The famed quote wasn't quite so spontaneous after all, at least according to the late astronaut's brother

Mysteries of Space : Instant Guide
In the event that asteroids were barreling toward Earth, we'd need to "find them before they find us," says one expert.

How we'd really deal with an Armageddon-sized asteroid

Hint: We probably wouldn't nuke it

NASA : Instant Guide
Buzz Lightyear… is that you?

NASA's next-generation spacesuit: Inspired by Buzz Lightyear?

The space agency reveals a prototype for its first new suit in 20 years. And it looks awfully familiar...

Mysteries of Space : Instant Guide
NASA's Cassini spacecraft snapped this photo of Saturn while it was in the planet's shadow.

What the dark side of Saturn looks like

NASA's Cassini spacecraft captures the gas giant from an unusual angle, making for one haunting photograph

NASA : Best Video
"It always amazes me how city lights in the United States just suddenly stop west of the central time zone," says Phil Plait at Slate.

WATCH: Eerie video of Earth's glowing cities — from space

Behold: "Black Marble"

NASA : Instant Guide
Three generations of Mars rovers, including an early version of Curiosity (right).

Next up for NASA: Another rover on Mars by 2020

The space agency plans to follow up Curiosity with a shiny new space lab within the next decade

Mysteries of Space : Instant Guide
A mosaic of Mercury's North Polar Region

Forget Mars: Why Mercury's ice-covered poles may be more important

The hot little planet's north pole is covered in enough ice to bury Washington, D.C., under two and a half miles of frozen water

Mysteries of Space : Instant Guide
The small flattened galaxy (center) has a black hole equivalent to 17 billion suns.

Spotted: The largest black hole ever seen

250 million light years away is a black hole with 17 billion times the mass of our own sun

NASA : Instant Guide
On October 4, 1957 the Soviet Union launched the world's first successful satellite, Sputnik 1, making the U.S. insanely jealous.

Why the U.S. wanted to nuke the moon during the Cold War

In the 1950s, with a young Carl Sagan lending a hand, America considered a novel way to outshine the Soviets

Mysteries of Space : Instant Guide
An artist's rendering shows "super-Jupiter," formally known as Kappa Andromedae b.

Discovered: A massive super-planet 13 times larger than Jupiter

Say hello to Kappa Adromedae b, a world so big it defies conventional classification

Mysteries of Space : Best Video
An explosion of plasma on the sun's surface during a violent storm on Nov. 16.

Caught on film: Two monstrous eruptions on the sun's surface

NASA releases startling footage of a dual set of solar prominences

Mysteries of Space : Slideshow
11 stunning images from Australia's rare total solar eclipse

7 stunning images from Australia's rare total solar eclipse

The natural wonder will hit any given spot on the planet just once every 375 years. On Wednesday, that lucky patch was in northern Australia

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