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ARIEL

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ARIEL

fourth medium mission of Cosmic Vision; optical telescope for surveys of known exoplanets

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About ARIEL

Ariel is a planned space telescope and the fourth medium-class mission of the European Space Agency's Cosmic Vision programme. The mission is aimed at observing at least 1,000 known exoplanets using the transit method, studying and characterising the planets' chemical composition and thermal structures. Compared to the James Webb Space Telescope, Ariel will be a much smaller telescope with more observing time available for planet characterisation. Ariel was expected to be launched in 2029 aboard an Arianespace Ariane 6 together with the Comet Interceptor into the Sun-Earth Lagrange point L2. However as of January 2026, it is likely to be delayed until 2031.

Facts from Wikidata (CC0). Image by European Space Agency via Wikimedia Commons (CC BY-SA 3.0 igo).

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Ariel WinterThe American actress doing a table read of your day.Mariel SheetsThe Screen figure, cornered at a party and loving it.Wilson Ariel Godoy GudielThe late-night sketch version — live in your chat.

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