Space
Explore the vast reaches of space and mankind’s continuing efforts to conquer the stars, including theories such as the Big Bang, the International Space Station, plus what the future holds for space travel and exploration.
The Zoo Hypothesis: Are Aliens Watching Us Like Animals in a Zoo?
Communicating With Aliens Is Hard. Communicating With Alien AI Could Be Harder
Could Dark Matter Spawn 'Shadow Life'?
The Mysteries of Mercury Retrograde Unveiled: A Cosmic Phenomenon
A Comprehensive Guide to the Layers of the Earth
Exploring the Outer Planets of the Solar System
10 Best Ideas for Interplanetary Communication
How can the moon generate electricity?
How Terraforming Mars Will Work
What Really Happened to Yuri Gagarin, the First Man in Space?
Apollo 11 One Giant Leap For Mankind
How Sputnik Worked
Moon's Glass Beads Hold Billions of Tons of Water
Quiz: Apollo 11, the First Moon Landing
Who was James Webb?
The Fastest Fictional Spaceships
10 Fictional Spacecraft We Wish Were Real
How Lunar Rovers Work
Learn More / Page 5
Although most people today will never set foot on the moon, it's likely you come into contact with a NASA byproduct every day.
Are we alone? Jodie Foster's character in "Contact" didn't think so, and neither do the scientists who've been listening for an extraterrestrial message for decades.
Why should space agencies and private companies get to have all the fun of making and launching true spacecraft, or those that cross the Karman line? Can't the rest of us seize a little cosmic glory, too?
By Robert Lamb
Advertisement
We've been cruising to and from the International Space Station since 2000. Isn't it about time we started moving on to other space destinations and establishing human outposts?
Galaxies got their start nearly 14 billion years ago, with one unimaginably hot, dense and tiny pinpoint. How did we arrive at the universe's sprawling state of galactic affairs today?
By Robert Lamb
It's tough to wrap your mind around a time when the Earth wasn't here. So how do Earth and the rest of the planets out there get their start in the universe?
By Robert Lamb
We can't defy the odds of an asteroid taking a turn for Earth forever, so the world's astronomers watch the sky. What happens once they spot something?
By Robert Lamb
Advertisement
Comic books have happily subscribed to the theory of multiple universes for decades. After all, how else could flying and leaping versions of Superman exist at the same time? In the real world, things are a little different.
By Robert Lamb
Humans in space may age just a bit more slowly than the rest of us, but they also experience rapid muscle and bone mass loss. Why does this happen, and do astronauts recover?
It wasn't so long ago that astronomers thought the universe contained normal matter, or baryonic matter, the base unit of which is the atom. But when it comes to the cosmos, there's always more than meets the eye. What else is hanging out in space?
Not a star. Not an airplane. No, this is something radically different. It moves through the night sky with amazing speed and pulsates with radiance beyond anything you've ever witnessed. UFO?
By Robert Lamb
Advertisement
Forget about curb appeal. This cosmic fixer-upper requires some serious renovations before we can start living on it. So how serious are we talking? And are they going to happen in our lifetime?
By Robert Lamb
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
The occasional sunspot can interrupt communications here on Earth. But major solar flares have the potential to cause more havoc. Could a flare-up wipe out all our electronics?
Scientists have discovered the existence of water on both our moon and on Mars. Both findings are significant, but what do they mean? Can we use this information to our advantage for space exploration?
By Josh Briggs
Advertisement
It's safe to assume there won't be a moon colony any time soon. But it's still a tantalizing thought. But wouldn't it be cool to be able to live, vacation and work on the moon?
Pluto is relatively round and orbits the Sun. So, why doesn't it qualify as a planet?
Project Mercury launched the first American into space. Have a look back at this historic mission.
SETI is the Search for Extraterrestrial Intelligence, and it's dedicated to discovering signals sent to Earth from far, far away. Find out what would happen if an extraterrestrial were to make contact.
Advertisement
Don't worry. We still love you, Earth, but we've been wondering about the possibility of life on other worlds for centuries, and now we have the tools to do some exploring. What have astronomers found so far?
By Craig Freudenrich, Ph.D., Patrick J. Kiger & Nicholas Gerbis
Alien life forms would probably differ from those on Earth but still adhere to certain principles. Learn about astrobiology and the search for alien life forms.
Get a sneak peek (even before NASA scientists) at a new type of spacecraft that could be jolted through space by electromagnets.
By Kevin Bonsor
Since the 1960s, we've been captivated by the planet Mars. How different is our neighbor, and what have we learned about the most explored planet?
Advertisement
Asteroid mines could become an incredible source of building supplies for a colony on the moon. Learn how they will work!
By Kevin Bonsor
Imagine waking up in the morning, looking out your window and seeing the planet Earth below you. What would it be like to live in space? Find out all about the International Space Station.