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    habitable zones tagged posts

    Planets of Red Dwarf Stars may face Oxygen Loss in Habitable zones

    February 10, 2017, Categories  Astronomy/Space

    In this artist's concept, X-ray and extreme ultraviolet light from a young red dwarf star cause ions to escape from an exoplanet's atmosphere. Scientists have developed a model that estimates the oxygen ion escape rate on planets around red dwarfs, which plays an important role in determining an exoplanet's habitability. (screen shot from video) Credit: NASA Goddard/Conceptual Image Lab; Michael Lentz, animator/Genna Duberstein, producer

    In this artist’s concept, X-ray and extreme ultraviolet light from a young red dwarf star cause ions to escape from an exoplanet’s atmosphere. Scientists have developed a model that estimates the oxygen ion escape rate on planets around red dwarfs, which plays an important role in determining an exoplanet’s habitability. (screen shot from video) Credit: NASA Goddard/Conceptual Image Lab; Michael Lentz, animator/Genna Duberstein, producer

    The search for life beyond Earth starts in habitable zones could potentially allow liquid water to pool on a planet’s surface. New NASA research suggests some of these zones might not actually be able to support life due to frequent stellar eruptions from young red dwarf stars...

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    Astronomer Searches for Signs of Life on Wolf 1061 Exoplanet

    January 20, 2017, Categories  Astronomy/Space

    An artist's rendering of an exoplanet is shown. An exoplanet is a planet that exists outside Earth's solar system. Credit: Illustration credit: NASA/Ames/JPL-Caltech

    An artist’s rendering of an exoplanet is shown. An exoplanet is a planet that exists outside Earth’s solar system. Credit: Illustration credit: NASA/Ames/JPL-Caltech

    As one of the world’s leading “planet hunters,” SF State University astronomer Stephen Kane focuses on finding “habitable zones,” areas where water could exist in a liquid state on a planet’s surface if there’s sufficient atmospheric pressure. Kane and his team, including former undergraduate student Miranda Waters, examined the habitable zone on a planetary system 14 light years away.

    “The Wolf 1061 system is important because it is so close and that gives other opportunities to do follow-up studies to see if it does indeed have life,” Kane said...

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    Are we alone? Setting some limits to our planet’s uniqueness

    April 30, 2016, Categories  Astronomy/Space, Biology/Biotechnology

    Illustration of the Drake equation and the Frank equation. In 1961, astrophysicist Frank Drake developed an equation to estimate the number of advanced civilizations likely to exist in the Milky Way galaxy. The Drake equation (top row) has proven to be a durable framework for research, and space technology has advanced scientists' knowledge of several variables. But it is impossible to do anything more than guess at variables such as L, the probably longevity of other advanced civilizations. In new research, Adam Frank and Woodruff Sullivan offer a new equation (bottom row) to address a slightly different question: What is the number of advanced civilizations likely to have developed over the history of the observable universe? Frank and Sullivan's equation draws on Drake's, but eliminates the need for L. Credit: Image courtesy of University of Rochester

    Illustration of the Drake equation and the Frank equation. In 1961, astrophysicist Frank Drake developed an equation to estimate the number of advanced civilizations likely to exist in the Milky Way galaxy. The Drake equation (top row) has proven to be a durable framework for research, and space technology has advanced scientists’ knowledge of several variables. But it is impossible to do anything more than guess at variables such as L, the probably longevity of other advanced civilizations...

    Read More