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The habitable zone of Gliese 581 compared with the Solar System's habitable zone. The 2007 discovery of Gliese 581c, the first super-Earth in the circumstellar habitable zone, created significant interest in the system by the scientific community, although the planet was later found to have extreme surface conditions that may resemble Venus. [138]
Earth is the only celestial body known for sure to have generated living beings, and thus the only current example of a habitable planet. At a distance of 1 AU from the Sun, it is within the circumstellar habitable zone of the Solar system, which means it can have oceans of water in a liquid state. [22]
Several other planets, such as Gliese 180 b, also appear to be examples of planets once considered potentially habitable but later found to be interior to the habitable zone. [ 1 ] Similarly, Tau Ceti e and f were initially both considered potentially habitable, [ 69 ] but with improved models of the circumstellar habitable zone, as of 2022 PHL ...
Jupiter -- and, by association, Europa -- is well outside the "habitable zone," the gauge astronomers have used for years to determine whether a planet can sustain liquid water, a major precursor ...
Of the natural satellites in the Solar System's habitable zone – the Moon, two Martian satellites (though some estimates put those outside it) [1] and numerous minor-planet moons – all lack the conditions for surface water.
Two teams of scientists have discovered a theoretically habitable planet called Gliese 12b that’s smaller than Earth but bigger than Venus, just 40 light-years away.
Habitable zone for complex life (HZCL): the place that all the life habitable zones overlap for a long period of time, as in the Solar System. [90] The list of habitable zones for complex life has grown longer with increasing understanding of the Universe, galaxies, and the Solar System.
The team devised a way to measure the surface gravity of distant stars to help determine if the planets in their orbit have life-supporting conditions.