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Exoplanet. Comparison of the probable size of WASP-17b, an exoplanet in the constellation of Scorpius to Jupiter (on left) using approximate models of planetary radius as a function of mass [1] [2] An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not ...
Learn about exoplanets, any planets beyond our solar system, and how NASA discovers and studies them. Find out about their types, sizes, compositions, and stories, and see stunning images and videos of them.
Apr 2, 2021 · Learn what an exoplanet is, how it is different from a planet in our solar system, and how it is detected and studied. Explore the diversity and variety of exoplanets, from water worlds to lava planets, and the methods used to find them.
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Jan 11, 2023 · Learn how NASA's James Webb Space Telescope observed an Earth-sized, rocky planet called LHS 475 b, which orbits a red dwarf star. See the data and images of the planet's spectrum, light curve, and size.
Nov 22, 2022 · Webb observes WASP-39 b, a hot Saturn orbiting a star 700 light-years away, and detects molecules, clouds, and photochemistry in its atmosphere. The data provide a molecular and chemical profile of this distant world and insights into its formation and evolution.
Jan 11, 2023 · Learn how NASA's James Webb Space Telescope detected an Earth-sized, rocky planet orbiting a red dwarf star 41 light-years away. See the spectrum, light curve, and illustration of LHS 475 b, a possible Venus-like world.
Sep 11, 2023 · K2-18 b is a sub-Neptune exoplanet in the habitable zone of its star, 120 light-years from Earth. Webb's observations reveal carbon-bearing molecules, dimethyl sulfide, and support the hypothesis of a water ocean and hydrogen-rich atmosphere.
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