An interstellar visitor, comet 3I/ATLAS, was observed by ESA's Mars orbiters, marking a rare event in space exploration.
The comet, only the third interstellar comet ever discovered, revealed a glowing coma as it was heated by the Sun.
Researchers are still studying the data to understand the comet's makeup and origins, with this event also foreshadowing future missions like the Comet Interceptor.
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Author's summary: ESA's Mars orbiters observed interstellar comet 3I/ATLAS.