This comparison by PHL@UPR Arecibo shows an actual image of an Earthly sunset vs. artistic renderings of the best candidates for potential habitable worlds so far.
The image corrects for the size, colors, and brightness of the star and sky as seen from an Earth-like world. As the creator of the image notes:
“The size of and colors of the star of Kepler-22 b look similar to Earth because it orbits a Sun-like star. The sunsets of Gliese 667Cc and 581d look much redder because they orbit a red dwarf star, with the sky of Gliese 581d much darker due to its greater distance. The star of HD 85512b is the brightest of all cases although the star of Gliese 667Cc is the biggest.”
For more information about these worlds check out the Habitable Exoplanet Catalog (HEC).
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