What is the probability of Kepler-442b supporting life?
- by as.com
- Aug 16, 2022
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Update: Aug 16th, 2022 10:43 EDT
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A team of astronomers recently discovered eight new exoplanets that orbit their stars at a distance that would allow them to have liquid water on their surface, according to National Geographic magazine, opening up the possibility that some of them could be within the “Goldilocks zone” that would permit life to exist. Of those eight, there are two that experts have identified as the most Earth-like exoplanets to date: Kepler438b and Kepler-442b.
In what way do they resemble our planet? Both are exoplanets: that is to say, they orbit around stars, as the Earth does with the Sun. Both do so around two red dwarf stars that are smaller and cooler than our Sun: 438b takes 35 days to orbit its star and 442b a total of 112 days.
According to the estimates of the researchers, 438b has a diameter 12% larger than that of Earth and a 70% chance of being a rocky planet. In addition, it receives 40% more light than our planet, so it has a 70% chance of being within a habitable zone of its star.
"This Goldilocks zone is the region around a star where the energy from the star would keep water liquid on a rocky planet’s surface." Dr. Lisa Kaltenegger (@KalteneggerLisa) #COSMOSCSI #COSMOS 4/ pic.twitter.com/17O7pUKhTu
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