https://www.earthmagazine.org/tags/extraterrestrial-life/ Recent content in Extraterrestrial Life on EARTH Magazine Hugo en-US American Geosciences Institute. All rights reserved. Fri, 03 Aug 2018 13:37:53 -0400 https://www.earthmagazine.org/article/obliquity-and-eccentricity-determine-exoplanet-habitability/ Fri, 03 Aug 2018 13:37:53 -0400 https://www.earthmagazine.org/article/obliquity-and-eccentricity-determine-exoplanet-habitability/ <figure class="earth-figure"> <img src="https://www.americangeosciences.org/static/earth/obliquity-and-eccentricity-determine-exoplanet-habitability/NASA_Exoplanet_GSFC_20171208_Archive_e001417~large.jpg" alt="Obliquity and eccentricity affect the habitability of exoplanets like GJ 504b, the lowest-mass planet ever directly imaged around a star like the sun. Credit: NASA/Goddard/S. Wiessinger." loading="eager" decoding="async"> <figcaption>Obliquity and eccentricity affect the habitability of exoplanets like GJ 504b, the lowest-mass planet ever directly imaged around a star like the sun. Credit: NASA/Goddard/S. Wiessinger.</figcaption> </figure> <p>Finding habitable Earth-like planets may be even more challenging than previously thought, suggests a recent Astronomical Journal <a href="http://iopscience.iop.org/article/10.3847/1538-3881/aac214">study</a> looking at how the planetary obliquity, or tilt relative to an orbital axis, and orbital eccentricity affect the habitability of planets orbiting G-dwarf stars — which are similar to the sun.</p> https://www.earthmagazine.org/article/comment-could-nasa-find-evidence-extraterrestrial-life-2050/ Tue, 01 May 2018 12:26:02 -0400 https://www.earthmagazine.org/article/comment-could-nasa-find-evidence-extraterrestrial-life-2050/ <figure class="earth-figure"> <img src="https://www.americangeosciences.org/static/earth/comment-could-nasa-find-evidence-extraterrestrial-life-2050/TESS_NASAGoddardSFC.jpg" alt="The Transiting Exoplanet Survey Satellite, which launched in April, is the successor to the Kepler Space Telescope and is the most sophisticated exoplanet-hunting spacecraft yet. Credit: NASA Goddard Space Flight Center." loading="eager" decoding="async"> <figcaption>The Transiting Exoplanet Survey Satellite, which launched in April, is the successor to the Kepler Space Telescope and is the most sophisticated exoplanet-hunting spacecraft yet. Credit: NASA Goddard Space Flight Center.</figcaption> </figure> <p>by Jacob Haqq-Misra</p> https://www.earthmagazine.org/article/geologic-column-lessons-final-frontier/ Thu, 02 Feb 2012 13:38:52 -0500 https://www.earthmagazine.org/article/geologic-column-lessons-final-frontier/ <p>Somewhere, out there, beyond the stars Arcturus and Pollux, the TV signals from the final season of the original &ldquo;<a href="http://www.startrek.com/">Star Trek</a>&rdquo; are radiating outward. The series has been a teaching tool for a generation, and the programs offer multiple lessons for earth scientists.</p>