The risk of a cosmic body striking the Earth—or exploding in the atmosphere—may be higher in 2032 and 2036, researchers have ...

Contextualizing speed and distance helps set expectations. Around perihelion, 3I/Atlas is moving at roughly 68 km per second. Its closest approach to Earth is about 1.8 AU, near December 19, which is ...

The comet, called 3I/ATLAS, is the third known interstellar object that has come through our solar system. As it flies deeper ...

Astronomers can usually spot "planet killer" asteroids long before they approach Earth. But what if they can't?

Visualize the catastrophic effects of a massive asteroid impact on Earth.

Quasi-moons are not real moons and don't actually orbit the Earth, although they sometimes appear to do so for short periods of time, Phil Nicholson, professor of astronomy at Cornell University, told ...

Earth has just acquired a new best friend in space – a small asteroid named 2025 PN7. Not quite a moon, it has been moving in quiet company with our planet for decades, pacing our planet in nearly ...

A small asteroid, known as 2025 TF, flew over Antarctica on October 1, 2025, at an altitude of only 266 miles.

Earth just got a new tag-along in space — a little asteroid named 2025 PN7. NASA confirmed this week that the rock, ...

The Paris-based European Space Agency says a near 10-foot-wide asteroid passed Earth 265 miles above Antarctica but was not detected until hours after it was gone.

An asteroid was spotted whizzing past Earth last week in the second closest approach to the planet ever recorded, according to authorities. Asteroid 2025 TF soared over Antarctica just before 9 p.m.

A newly discovered asteroid just whizzed past Earth, marking the second-closest asteroid flyby on record, astronomers say. The asteroid flew over Antarctica just before 9 p.m. ET on Sept. 30, about ...