Sometimes "the universe comes to us," writes the European Space Agency. For the third time since 2017, an interstellar object ...

史上3例目の恒星間天体「アトラス彗星」（3I/ATLAS）が発見された。直径20kmほどとみられ、過去の2例よりもかなり大きい。11月中旬ごろには明け方に13等程度で観測可能になりそうだ。

現地時間2025年7月2日（現地時間）、新たな恒星間天体の候補である「A11pl3Z」の発見が報告されました。まだきちんとした名前すら付けられていない段階から、この発見は天文学者の注目を集め、わずか1日足らずで正式な名前「 3I/ATLAS ...

NASA scientists have discovered a rare visitor from beyond our solar system, a new interstellar comet speeding by on a brief ...

How do we know 3I/ATLAS, also called comet C/2025 N1 (ATLAS), is interstellar? Will it strike Earth? Can we visit it? Here ...

Hopkins and Lintott are two of the six authors of a new paper that uses the new model to trace the origin of Comet 3I/ATLAS, and it appears to be coming from a completely different region of the ...

You can watch comet 3I/ATLAS live online tonight (July 3), thanks to the Virtual Telescope Project, which will livestream ...

Astronomers have confirmed the discovery of a rare celestial visitor: a comet from beyond our Solar System. Officially named ...

I/ATLAS, also known as C/2025 N1 (ATLAS), originated in a distant star system, far beyond the boundaries of our solar system.

Astronomers discovered 3I/ATLAS, a 10–20 km-wide interstellar comet racing into the solar system. It will reach perihelion in ...

Late in the evening on July 1, a telescope in Chile that is part of the global, NASA-funded Asteroid Terrestrial-Impact Last ...