tagged with: star galaxies, outer space picture, exoplanets, potentially habitable worlds, other planets, other worlds, earth similarity index, possible life, goldilocks zone, pheasat, deep space astronomy
Galaxies, Stars and Nebulae series A side-by-side comparison featuring artistic representations of the only known planets around other stars (exoplanets) having a chance to support life as we know it. Earth, Mars Jupiter, and Uranus are shown for scale. All are ranked with the Earth Similarity Index (ESI), a measure of Earth-likeness from zero to one, with a value of one being identical to Earth.
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image code: pheasat
Image credit: PHL @ UPR Arecibo (phl.upr.edu) July 29, 2013
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