Outer Space
Reagan and Gorbachev Agreed to Pause the Cold War in Case of an Alien Invasion
The 40th President of the United States was a big science-fiction fan
How NASA's Flight Plan Described the Apollo 11 Moon Landing
A second-by-second guide to the historic mission
Look to the Skies This Month for the Pleiades Star Cluster
The Seven Sisters will shine bright from dusk till dawn for the rest of November
A New Earth-Sized Planet Is Getting Astronomers Riled Up
It could be a rare opportunity for scientists to study an exoplanet’s atmosphere
Get Your Pickaxe and Spacecraft Ready, Space Mining Might be Legal Very Soon
The new Space Act would open up the potentially lucrative field of asteroid mining
This Ingenious Archaeologist Uses Satellites to Hunt Down Tomb Raiders
Can satellite imagery help protect humanity's priceless artifacts?
Mars' Gravity Is Slowly Shredding Its Moon Phobos
Telltale grooves on the moon's surface are an early sign of Phobos' grim fate
During the Cold War, the Military Had Plans to Wage War in Space
The U.S. Army's Future Weapons Office proposed theoretical ways to defend non-existant lunar bases
Sorry Pluto, You Still Aren’t a Planet
A new test for planetary status leaves the diminutive world and its dwarf planet kin out of the family portrait
Pluto May Have Ice Volcanoes at the Bottom of Its Heart
Two southern peaks have depressions that hint they once spewed icy slurry onto the tiny world's surface
Watch 30 Minutes of Mesmerizing, Ultra-HD Sun
NASA's Solar Dynamics Observatory stares at the sun so you don't have to
The Sun Stole Part of Mars' Atmosphere, and NASA Was Watching
Observations from the MAVEN spacecraft should help scientists figure out if and when Mars had the right conditions for life
Seven Simple Ways We Know Einstein Was Right (For Now)
For the past 100 years, these experiments have offered continued evidence that general relativity is our best description of gravity
In a Rare Pairing, a Venus-Like Planet Has Been Found Around a "Failed Star"
The system offers clues to the way planets and moons form and may aid in the quest to find habitable worlds across the galaxy
A Forgotten Piece of Space Junk is Headed for Earth
The object could be a lost piece of a rocket dating back to the Apollo missions
NASA Spacecraft Heads for Deepest Ever Dive Into Saturn Moon's Plumes
Cassini will plunge into the watery geysers to search for evidence of hydrothermal vents and other clues about the moon's hidden ocean
92 Percent of Possible Earth Twins Have Yet to Be Born
Our young universe promises trillions of more planets to come
An Asteroid Will Buzz by Earth on Halloween
Don't worry—it won't interrupt your Halloween plans
Dead Star Shredding a Rocky Body Offers a Preview of Earth's Fate
The stellar corpse spotted by a NASA telescope backs up a theory that white dwarf stars eat planetary remnants
New Video of Floating Blobs of Fizzy Water in Space
Microgravity is the best place to figure out why raindrops are round
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