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The European Space Agency’s Euclid space telescope has found its first comet, C/2026 S1 (Euclid), BBC Sky at Night Magazine reports. Motion-detection software flagged a fast-moving streak with a fuzzy cloud across five image sets; ground-based confirmation led to recognition on October 8. The comet lies about 1.3 billion kilometers from the Sun and follows an orbit nearly perpendicular to the planets’ that takes thousands of years, making it too dim for amateur telescopes. Around 40 to 50 new comets are identified each year.

Disclosure: This video contains stock footage and content created or enhanced using AI-assisted tools.

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00:00a space telescope built to study dark matter, has discovered its first comet.
00:04The find hints that the Euclid telescope could help spot distant comets in the future.
00:09The comet is named C2026-S1-Euclid. Software that hunts for moving objects flagged a fast streak
00:16across several images. A fuzzy cloud around it showed an active comet shedding dust and gas.
00:21It was recognized on October 8th and confirmed with telescopes on the ground.
00:26The comet sits about 1.3 billion kilometers from the Sun. That is roughly between the orbits of
00:32Jupiter and Saturn. Its orbit runs almost perpendicular to the planets and takes thousands of years.
00:38This is probably its first visit since telescopes were invented. Around 40 to 50 new comets are
00:44identified each year. This one is too dim for backyard telescopes. Euclid has now added comet
00:49hunting to its list of discoveries. Disclosure. This video contains stock footage and content
00:54created or enhanced using AI-assisted tools.

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