Two extrasolar planets have been found that are potentially habitable according to two researchers from two Israeli institutes. The two planets orbit the star of Teegarden, a red dwarf 12.5 light-years away from us.
This star was discovered in 2003 by the astrophysicist Bonnard Teegarden while the two planets, “b” and “c,” were discovered in June by another team.
According to Amri Wandel and Lev Tal-Or, the two researchers, one from the Hebrew University of Jerusalem, the other from Tel Aviv University, the two planets orbit their star in only 4.9 and 11.4 days what which, combined with the size of the star itself, ensure that the two planets can be inserted into the so-called “habitable zone.”
In addition, both have an orbit with one side always facing the star. In essence, they do not have the cycle of day and night. This type of planet was initially considered, at least until a few years ago, as uninhabitable as one side would always be too hot and the other always too cold.
However, new theories have confirmed that a thin strip of land at the borders between these two zones can be habitable provided that the other conditions, such as the orbital location of the planet itself in the habitable zone, are satisfied.
According to the two researchers, it is likely that both planets can support liquid water on their surface. The two planets also have dimensions comparable to those of the Earth.