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Finding Exo-Earths with Precision Space Astrometry

Published onMay 31, 2019
Finding Exo-Earths with Precision Space Astrometry
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Abstract

Astrometry may be the only technique capable of finding Earth-twins. It measures the reflex motion of a star in the plane of the sky allowing one to determine a planet’s mass and its orbital inclination. Astrometric measurements with 1 μas precision allow to search for a 1 Mearth planet in the middle of the habitable zone.

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