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In July 2025 astronomers spotted 3I/ATLAS — a comet from another star system, only the third interstellar object ever detected passing through our Solar System.

NASA (2025)

SpaceScience

Why it matters

The idea in context

The NASA-funded ATLAS survey telescope in Chile reported it on 1 July 2025. It was moving at roughly 137,000 mph — too fast for the Sun to hold — on a path that will fling it back out of the Solar System. It rounded the Sun just beyond Mars's orbit in October 2025 and had drifted through interstellar space for perhaps billions of years before arriving.

Türkçe

Aynı kart, başka bir dilde.

Temmuz 2025'te gökbilimciler 3I/ATLAS'ı buldu — başka bir yıldız sisteminden gelen, Güneş Sistemi'mizden geçtiği saptanan yalnızca üçüncü yıldızlararası cisim olan bir kuyruklu yıldız.
NASA (2025)

Şili'deki NASA destekli ATLAS gözlem teleskobu onu 1 Temmuz 2025'te bildirdi. Saatte yaklaşık 137.000 mil hızla — Güneş'in tutamayacağı kadar hızlı — ilerliyordu ve yörüngesi onu Güneş Sistemi'nin dışına geri fırlatacak. Ekim 2025'te Mars yörüngesinin hemen ötesinde Güneş'in çevresinden döndü; gelmeden önce belki milyarlarca yıl yıldızlararası uzayda sürüklenmişti.

Source trail

Read beyond the card.

Background reading: 3I/ATLASAttribution and context are revised when stronger evidence appears. Corrections are welcome through the editorial page.
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