![]() Most such planets, being either super-Earths or gas giants, are more massive than Earth, because massive planets are easier to detect. Since the concept was first presented in 1953, many stars have been confirmed to possess an HZ planet, including some systems that consist of multiple HZ planets. The habitable zone is also called the Goldilocks zone, a metaphor, allusion and antonomasia of the children's fairy tale of " Goldilocks and the Three Bears", in which a little girl chooses from sets of three items, ignoring the ones that are too extreme (large or small, hot or cold, etc.), and settling on the one in the middle, which is "just right". Due to the importance of liquid water to Earth's biosphere, the nature of the HZ and the objects within it may be instrumental in determining the scope and distribution of planets capable of supporting Earth-like extraterrestrial life and intelligence. The bounds of the HZ are based on Earth's position in the Solar System and the amount of radiant energy it receives from the Sun. ![]() In astronomy and astrobiology, the habitable zone ( HZ), or more precisely the circumstellar habitable zone ( CHZ), is the range of orbits around a star within which a planetary surface can support liquid water given sufficient atmospheric pressure. This plot includes Solar System planets ( Venus, Earth, and Mars) as well as especially significant exoplanets such as TRAPPIST-1d, Kepler-186f, and our nearest neighbor Proxima Centauri b. A diagram depicting the habitable zone boundaries around stars, and how the boundaries are affected by star type. For the galactic zone, see Galactic habitable zone. This article is about the circumstellar zone.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |