彗星

A new simulation from Michigan State University shows how two‑lobed, snowman-shaped Kuiper Belt objects can form naturally by gravitational collapse, and explains how icy grains s… 2月 27, 2026

Data this week show interstellar comet 3I/Atlas slowed to near‑stop about 27 million km from Mars, forcing scientists to re-evaluate non‑gravitational forces and orbital models us… 2月 22, 2026

Comet 3I/ATLAS—only the third confirmed interstellar object to visit our solar system—has been scanned by major radio and optical facilities; scientists report no signs of enginee… 1月 13, 2026

Astronomers say interstellar comet 3I/ATLAS experienced a small acceleration that gravity alone can't explain. Here's what the measurements mean, how jets of gas can push a comet,… 12月 17, 2025

The UN has formally designated the interstellar comet 3I/ATLAS as the focus of a global planetary-defence drill, turning an unusual cosmic visitor into a real-world test of humani… 11月 27, 2025

Elon Musk warned on a recent podcast that the interstellar visitor 3I/ATLAS—while almost certainly not aimed at Earth—would be catastrophic if it ever struck the planet. Scientist… 11月 17, 2025

Comets Lemmon (C/2025 A6) and SWAN (C/2025 R2) are visible after sunset in the Northern Hemisphere on Oct. 23, 2025. Binoculars will help reveal their tails; this is a last good v… 11月 12, 2025