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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.

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How SETI Works

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.


Cosmic Rays Recreated in the Lab, With a Goal of Safer Space Missions

Can we recreate cosmic radiation in laboratories? Learn more about space radiation studies in this HowStuffWorks article. See more »

Comets Are Oxygen Factories

Scientists have figured out how comet 67P and others like it are generating oxygen abiotically. Learn more at HowStuffWorks. See more »

Turning Martian Soil Into Building Blocks for Colonists

Scientists have figured out how to make Martian bricks using simulated Martian soil. Learn more at HowStuffWorks. See more »

4 Reasons Why 'Earth-like' Gliese 1132b Isn't All That 'Earth-like'

Astronomers discovered that the exoplanet Gliese 1132b has an atmosphere. Learn about Gliese 1132b and its Earth-like and non-Earth-like qualities. See more »

Event Horizon Telescope Getting Historic Look at Milky Way's Black Hole

The Event Horizon Telescope has begun imaging the supermassive black hole at the center of the Milky Way. Learn more at HowStuffWorks. See more »

Gamers Can Help Scientists Hunt for Real Exoplanets in 'EVE Online'

The video game 'EVE Online' will partner gamers with scientists to hunt for real exoplanets. Learn more in this HowStuffWorks article. See more »

5 Secrets About the Soviet Space Program

The Soviets were secretive about their space program. We're telling five of the biggest now. See more »

NASA Study Discovers 'Space Gene' and More

Preliminary results are in from a major NASA study and HowStuffWorks NOW explains what they know so far. See more »

Stephen Hawking Plans to Send Tiny Nanocraft to Alpha Centauri

An unmanned spacecraft could be headed for Alpha Centauri soon. Learn more at HowStuffWorks Now. See more »

Getting Rid of the Right Stuff: The NASA Space Poop Challenge

NASA is holding a space poop challenge right now. Learn more about the contest at HowStuffWorks Now. See more »