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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
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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
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Watch 30 Minutes of Mesmerizing, Ultra-HD Sun
NASA’s Solar Dynamics Observatory stares at the sun so you don’t have to
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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
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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
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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
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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
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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
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92 Percent of Possible Earth Twins Have Yet to Be Born
Our young universe promises trillions of more planets to come
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An Asteroid Will Buzz by Earth on Halloween
Don’t worry—it won’t interrupt your Halloween plans
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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
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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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First Official Data From the Pluto Flyby Reshapes the Dwarf Planet’s History
“The ‘little spacecraft that could’ is making a lot of big discoveries,” says Alan Stern
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High Definition Video of Jupiter Reveals New Weather in the Great Red Spot
Video portrait shows massive storm changing as it shrinks
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The Draconid Meteor Shower Peaks This Week
Clear skies and little moonlight make for great meteor watching
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Space Rock Hunters Are About to Invade Antarctica
Scientists with the ANSMET program will endure six weeks near the South Pole during an annual field trip to find meteorites
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The Photos of the Rare Supermoon/Lunar Eclipse Convergence Do Not Disappoint
Take in the majesty of the unusual astrophysical event with these photos captured around the world
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NASA Unveils Giant Ice Cube With Wheels for Exploring Alien Oceans
An underwater rover might one day explore otherworldly seas
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50-Year-Old Moon Data Reveals Unseen Earthquakes
Scientists have identified four different types of moonquakes in data left over from Apollo 17
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How to Build a Seven-Mile-Wide Scale Model of the Solar System
It takes three-and-a-half miles to get from the Sun to Pluto
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