Astronomers say a distant, sunlike star shows signs of a catastrophic planet-on-planet crash that may mirror the ancient impact that formed Earth's moon.

The Milky Way won’t last forever. Astronomers say it’s on a collision course with the Andromeda Galaxy, a slow-motion crash that will erase our galaxy’s identity. The universe already knows how it ...

A strange flicker from a star 11,000 light-years away reveals evidence of two planets crashing together in a rare cosmic ...

Earthworks go back to prehistoric times. But our turbulent era is inspiring a new generation of artists. Here are six projects that stand out.

A new study reveals all five fundamental nucleobases – the molecular “letters” of life – have been detected in samples from ...

If you look eastward at the same hour for two nights in a row, you’ll find that the stars seem to be in the same place. But ...

Astronomers have witnessed evidence of an extremely violent collision between planets, and it resembles the event in Earth's history that created the moon.

The Small Magellanic Cloud (SMC) is one of the Milky Way's closest galactic neighbors—a small, gas-rich galaxy visible to the ...

Despite years of debate and follow-up studies, an odd streak of cosmic light still defies a final explanation. Is it a giant ...

Gamma-ray bursts are the most violent explosions in the universe. In a fraction of a second, they can release more energy than the sun will emit across its entire 10-billion-year lifetime. Most are ...