The Transiting Exoplanet Survey Satellite (TESS), NASA’s planet hunting satellite was launched on 18th April, 2018, for discovering transiting planets smaller than Neptune around stars bright enough for spectroscopic investigations of their masses and atmospheres. Data from the TESS has been used by the Harvard Smithsonian Centre for Astrophysics scientists to discover a ‘hot earth’ exoplanet that orbits its dwarf star in just 11 hours. It is rocky in composition and only about fifty light years away, with a radius of about 1.3 Earth-radii. Its short orbital period suggests that it is very close to its star- only about seven stellar radii. It is difficult to retain atmosphere at the inferred 800 Kelvin temperature, but still possible. Owing to the planet’s proximity to us, we have an opportunity of characterizing any atmosphere it might have using transit and occultation spectra of the source and the result would also help to uncover the planet’s formation.
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