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NASA There’s a 93-Billion-Mile Structure in Space, and Astronomers Can’t Fully Explain It
Hubble observations reveal new details about an enormous cosmic dust structure that may have formed after two planetary bodies collided.
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Scientists Just Discovered That Earth’s Core Is Leaking, and It Has Been for Billions of Years
A new study suggests ancient hydrogen trapped deep inside Earth has been slowly escaping into the mantle for billions of years.
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NASA Wants to Explore a Giant Moon Hole That Could Shelter Astronauts
The GIMLI mission will investigate whether a giant lunar pit leads to caves that could shield astronauts from radiation and heat.
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A Massive New Moon Crater Is Raising Questions About Future Lunar Bases
A fresh 728-foot-wide lunar crater highlights the danger of impacts—and flying debris—for astronauts living on the Moon.
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Scientists Calculated How Long a Moon City Could Survive. The Results Aren’t Great.
A new study suggests a million-person lunar city could exhaust even an optimistic water supply within a century, despite extensive recycling.
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Mercury Is Slowly Collapsing in on Itself, and It’s Worse Than We Thought
New research suggests Mercury has shrunk more than previously estimated as its cooling core causes the planet’s surface to contract.
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Scientists May Have Finally Figured Out Why Astronauts Get Constipated in Space
A new study suggests microgravity changes how gut bacteria process food, slowing digestion and making constipation more likely.
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Photo: SCIEPRO / Getty Images Earth Is Getting a Front-Row Seat to One of the Rarest Asteroid Flybys Ever
NASA says the asteroid Apophis won’t hit Earth, but its ultra-close flyby could be visible to billions of people.
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Earth’s Orbit Is Full of Hidden Space Junk, and Some of It Could Threaten Modern Life
Researchers found previously undetected debris near geosynchronous orbit, where critical communications and weather satellites operate.
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Scientists Say Some Ejected Comets Could Return to Our Solar System
Researchers say rare “quasi-interstellar objects” could be comets ejected by our solar system that eventually return after drifting through the galaxy.
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Good News! The Sun Might Not Eat Earth After All, According to New Simulations.
New simulations suggest Earth may avoid being engulfed by the Sun, though the planet would still become uninhabitable long before then.
