Image: Kepler-22b System Diagram

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Description: Kepler-22b -- Comfortably Circling within the Habitable Zone This diagram compares our solar system to Kepler-22, a star system containing the first "habitable zone" planet discovered by NASA's Kepler mission. The habitable zone is the spot around a star where temperatures are right for water to exist in its liquid form. Liquid water is essential for life on Earth. Kepler-22's star is a bit smaller than our sun, so its habitable zone is slightly closer in. The diagram shows an artist's rendering of the planet comfortably orbiting within the habitable zone, similar to where Earth circles the sun. Kepler-22b has a yearly orbit of 289 days. The planet is the smallest known to orbit in the middle of the habitable zone of a sun-like star. It's about 2.4 times the size of Earth. Image credit: NASA/Ames/JPL-Caltech
Title: Kepler-22b System Diagram
Credit: http://www.nasa.gov/mission_pages/kepler/multimedia/images/kepler-22b-diagram.html
Author: NASA/Ames/JPL-Caltech
Usage Terms: Public domain
License: Public domain
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