Our solar system is a passenger on a galactic rollercoaster. Part 2 reveals how the Sun, carrying Earth, orbits the Milky Way's core at 491,000 mph, completing a circuit every 230 million years. We ...

Comet Lemmon was discovered in January 2025 and made its closest approach to Earth in late October 2025. But by November 2025 ...

Comet 3I/ATLAS will get closest to Earth on Dec. 19, and astronomers will be watching.

A mysterious excess of far-ultraviolet light seen across the Milky Way could come from the annihilation of clumpy dark matter ...

For most of human history, the Milky Way has been a hazy band of light, a backdrop rather than a map. Now, by reading the ...

Comet 3I/ATLAS, an interstellar visitor, reaches its closest approach to Earth on Dec 19 at about 167 million miles - visible ...

I/ATLAS comet is the 3rd-ever object discovered that originated from outside our solar system. It's not a threat, approaches ...

A stray comet from another star swings past Earth this week in one last hurrah before racing back toward interstellar space.

Before 3I/ATLAS, the only other confirmed interstellar tourists we've seen were the now-famous, cigar-shaped 'Oumuamua' in ...

The world's largest planetary defense drill is underway as scientists prepare for 3I/ATLAs to make its closest pass by Earth ...

Comet 3I/Atlas is not just any comet; it is the third known interstellar object to traverse our solar system. Unlike comets such as Halley's, which originate from the icy fringes of our solar system, ...

Interstellar comet 3I/ATLAS makes its closest Earth approach on Dec. 19, offering astronomers a rare chance to study a visitor from beyond the solar system ...