NASA : Essay
Today in history: Looking back at the 1986 Challenger Shuttle disaster

Today in history: Looking back at the 1986 Challenger Shuttle disaster

"The Challenger crew was pulling us into the future, and we'll continue to follow them." — Ronald Reagan

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?

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

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...

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

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

NASA : Burning Question
NASA has long had its eye on a return to the moon, and with Obama's re-election, the space agency just might get there.

Will Obama's NASA take American astronauts back to the moon?

A big announcement concerning man's future in space might just be on the horizon

NASA : Fact Sheet
NASA astronaut Sunita Williams (pictured) is one of two Americans currently aboard the International Space Station.

Are astronauts stuck in space allowed to vote?

Two Americans are currently in orbit hundreds of miles above Earth on the International Space Station. Talk about absentee voting...

NASA : Instant Guide
A composite image of NASA's Mars rover shows Curiosity extending its robotic arm for the first time, on Aug. 20.

Will the Curiosity rover ever come back to Earth?

NASA hopes that when humans set foot on Mars, they'll be able to bring the beloved rover home

NASA : Best Video
NASA has created a futuristic exoskeleton called the X1, reminiscent of Marvel Comic's Iron Man suit.

NASA's Iron Man space suit

The space agency is working on a load-bearing exoskeleton to help astronauts work out and (potentially) lift heavy objects with augmented strength

NASA : Analysis
 A SpaceX Falcon 9 rocket attached to the cargo-only capsule called Dragon lifts off from the launch pad on Oct. 7 in Cape Canaveral, Fla. The spacecraft is carrying supplies, including ice cream, to the International Space Station.

What the SpaceX launch means for private space flight

The company founded by PayPal billionaire Elon Musk makes its inaugural run to the International Space Station, marking a big step for commercial space flight

NASA : Slideshow
NASA's retired space shuttles: 13 iconic views from Endeavor, Enterprise, and Discovery's flyovers

NASA's retired space shuttles: 12 iconic views from Endeavor, Enterprise, and Discovery's flyovers

Three hardworking orbiters take their final victory rounds enroute to California, New York, and Washington D.C.

NASA : Instant Guide
NASA astronaut Sunita Williams, pictured in the International Space Station on July 27, has now run a marathon and, most recently, a triathlon while in space.

The astronaut who completed a triathlon in space

Sunita Williams becomes the first astronaut to finish the triple-threat race by running, biking, and even swimming her way to the orbital finish line

NASA : The List
Neil Armstrong is pictured inside the Lunar Module "Eagle" which touched down on the Sea of Tranquility on the east side of the moon at 4:17 p.m. July 20, 1969.

Remembering Neil Armstrong: A humble hero and legendary astronaut

"That's one small step for [a] man, one giant leap for mankind," Armstrong said as he set foot on the moon and inspired generations of people around the world

NASA : Best Video
The Curiosity rover's heat shield can be seen falling to Mars' surface as the space lab makes its historic landing onto the Red Planet. 

The Curiosity rover: The jaw-dropping HD footage of its descent to Mars

New footage allows earthlings to visualize the "seven minutes of terror" the Mars rover endured as it made its descent onto Martian soil

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