SDG 15: Life on Land

The four most promising worlds for alien life in our solar system

Titan, Saturn's largest moon appears before the planet as it undergoes seasonal changes in this natural color view from NASA's Cassini spacecraft in this handout released by NASA August 29, 2012. The moon measures 3,200 miles, or 5,150 kilometers, across and is larger than the planet Mercury. Cassini scientists have been watching the moon's south pole since a vortex appeared in its atmosphere in 2012. REUTERS/ NASA/JPL-Caltech/SSI (UNITED STATES - Tags: SCIENCE TECHNOLOGY) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS - TM3E88T1I1O01

The most likely planets to sustain life include Mars, Europa and Titan. Image: REUTERS/ NASA/JPL-Caltech/SSI

Gareth Dorrian
Post Doctoral Research Fellow in Space Science, University of Birmingham
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SDG 15: Life on Land

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Mars has polar ice caps.
Mars has polar ice caps. Image: ESA & MPS for OSIRIS Team
Europa’s icy surface is a good sign for alien hunters.
Europa’s icy surface is a good sign for alien hunters. Image: NASA/JPL-Caltech/SETI Institute
Europa’s icy surface is a good sign for alien hunters.
Europa’s icy surface is a good sign for alien hunters. Image: NASA/JPL-Caltech/SETI Institute
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Related topics:
SDG 15: Life on LandSDG 14: Life Below WaterEmerging TechnologiesTechnological Transformation
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