: Astronomie: extrasolar planet

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extrasolar planet

An exoplanet, or extrasolar planet, is a planet in orbit around a star other than the Sun. More than 4,000 exoplanets have been confirmed. Until recently, the great majority of exoplanets detected, with the exception of the pulsar planets, had small orbital radii and masses similar to or greater than that of Jupiter. This apparent bias arose simply because high-mass objects in compact orbits produce comparatively large effects on their host stars which put them within reach of the methods, and the sensitivity of those methods, currently available. However, over the past two or three years, more and more planets of lower mass – down to just a few times the mass of Earth – have been found. (Encyclopedia of Science, by David Darling, https://www.daviddarling.info/encyclopedia/E/extrasolarp.html)

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