LYNETTE COOK / SCIENCE PHOTO LIBRARY LYNETTE COOK / SCIENCE PHOTO LIBRARY
Not for use in popular astronomy and related books for adults.
Extrasolar planet types. Artwork showing four types of terrestrial extrasolar planets. Going clockwise, the upper left planet orbits close to its parent star but outside the habitable zone, it is a barren world without water. The next planet orbits within the habitable zone and is a warm and moist world covered with plant life. The lower right planet orbit slightly further away but still within the habitable zone and is most likely to be at the correct temperature to maintain liquid water and an atmosphere. This planet is most similar to Earth. The lower left planet shows a frozen, ice-covered world that orbits furthest from its parent star and outside the habitable zone.
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