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Good news for lunar bases? Earth's atmosphere leaks all the way out to the moon
By Keith Cooper published
Anomalous amounts of volatile elements found in the Apollo samples brought back from the moon have been traced back to our own planet's leaky atmosphere.

Why interstellar comet 3I/ATLAS' close Earth approach is an early Christmas gift for astronomers
By Darryl Seligman published
When 3I/ATLAS is closest to the Earth on Dec. 19, all the features that we are looking for will be easier to detect with our telescopes.

Asteroid belt — What it is, where it is and how it formed
By Nola Taylor Tillman last updated
Reference Most asteroids orbit between Mars and Jupiter in the main asteroid belt. But some space rocks stray out of the main belt and threaten Earth.

Space.com headlines crossword quiz for week of Dec. 8, 2025: NASA lost contact with which Mars spacecraft this week?
By Kenna Hughes-Castleberry published
Test your space smarts with our weekly crossword challenge, crafted from Space.com's biggest headlines.

When darkness shines: How dark stars could illuminate the early universe
By Alexey A. Petrov published
Dark stars are not exactly stars, and they are certainly not dark.

Einstein's right again! Scientists catch a feasting black hole dragging the very fabric of spacetime
By Robert Lea published
"This is a real gift for physicists as we confirm predictions made more than a century ago."

A spider-like scar haunts Jupiter's moon Europa — and scientists think they know why
By Samantha Mathewson published
A strange, spider-like scar on Jupiter's icy moon Europa may mark where salty water once surged up through its fractured crust.

NASA's Chandra telescope uses 'X-arithmetic' to reveal how black holes shape galaxy clusters (images)
By Samantha Mathewson published
A novel "X-arithmetic" technique reveals how black holes shape the universe's largest structures.
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