APOD: 2025 December 1 Б 3I ATLAS: Tails of an Interstellar Comet
1.12.2025 | Астрономическая картинка дня

How typical is our Solar System? Studying 3I/ATLAS, a comet just passing through, is providing clues. Confirmed previous interstellar visitors include an asteroid, a comet, a meteor, and a gas wind dominated by hydrogen and helium.