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    spectroscopic survey of the Earth-sized planets (d tagged posts

    Atmospheres of Exoplanets in TRAPPIST-1 Habitable Zone probed

    February 6, 2018, Categories  Astronomy/Space

    This artist's concept shows what the TRAPPIST-1 planetary system may look like, based on available data about the planets' diameters, masses, and distances from the host star, as of February 2018. Credit: NASA, JPL/Caltech, and R. Hurt and T. Pyle (IPAC)

    This artist’s concept shows what the TRAPPIST-1 planetary system may look like, based on available data about the planets’ diameters, masses, and distances from the host star, as of February 2018. Credit: NASA, JPL/Caltech, and R. Hurt and T. Pyle (IPAC)

    Astronomers using Hubble have conducted the first spectroscopic survey of the Earth-sized planets (d, e, f, and g) within the habitable zone around the nearby star TRAPPIST-1. This study is a follow-up to Hubble observations made in May 2016 of the atmospheres of the inner TRAPPIST-1 planets b and c. Hubble reveals that at least 3 of the exoplanets (d, e, and f) do not seem to contain puffy, hydrogen-rich atmospheres similar to gaseous planets such as Neptune...

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