The list of potential planets that could be inhabited keeps on growing as two more planets have been added just recently. Some of the few criteria we always look for in considering exoplanets for habitation and possible future migration are water and certain gases like oxygen, nitrogen, and hydrogen among others.
The planets orbit a sun known as "Teegarden's star," which is only 12.5 light-years from Earth. The two planets look an awful lot like Earth and our neighboring worlds, the researchers said.
"The two planets resemble the inner planets of our solar system," lead author Mathias Zechmeister, a research scientist at the Institute for Astrophysics at the University of Göttingen in Germany, said in a statement. "They are only slightly heavier than Earth and are located in the so-called habitable zone, where water can be present in liquid form."
(Image credit: Universitat Gottingen)