3I/ATLAS: Interstellar Comet Observed by Tianwen-1

Tianwen-1 photographed 3I/ATLAS on Oct 3, 2025.
3I/ATLAS discovered in Chile on July 1, 2025.
Comet passed 30 million km from Mars.
ESA's ExoMars and Mars Express imaged 3I/ATLAS.
3I/ATLAS is 10,000x fainter than Martian targets.
Comet's 58 km/s speed strained imaging systems.
Tianwen-1 data aids Tianwen-2 mission.
3I/ATLAS may originate from ancient stars.
Comet will reappear in early Dec 2025.

Astronomy | Space Exploration | Interstellar Objects

China | Chile | ESA

1 day ago