NASA / JPL-CALTECH / AMES / SCIENCE PHOTO LIBRARY NASA / JPL-CALTECH / AMES / SCIENCE PHOTO LIBRARY
Habitable vs non-habitable zone planet. Computer illustration comparing a Super Venus type planet (left), which exists outside its star's habitable zone, with a Super Earth type planet (right), which exists within the habitable zone. The habitable zone is the region around a star where liquid water, an essential ingredient for life as we know it, could potentially be present. This image shows how a planet outside the habitable zone would most likely be a dry, toxic wasteland, whereas one within the zone might host oceans.
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