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Tag Archives: Earth-sized exoplanets

Circular orbits of small exoplanets: Which Earth-sized exoplanets are potentially habitable?

system Kepler-444

Viewed from above, our solar system’s planetary orbits around the sun resemble rings around a bulls-eye. Each planet, including Earth, keeps to a roughly circular path, always maintaining the same distance from the sun. For decades, astronomers have wondered whether the solar system’s circular orbits might be a rarity in ...

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