Astronomers have discovered a potentially habitable exoplanet around Teegarden's Star.
Teegarden is an old red dwarf star 12 light-years away in the Aries constellation.
The exoplanet found, called Teegarden b, has a minimum mass almost identical to Earth.
It orbits within the star's habitable zone.
And it has a 60% chance of having a temperate surface environment.
Surface temperature should be closer to 28°C assuming a similar terrestrial atmosphere.
Teegarden b is the exoplanet with the highest Earth Similarity Index discovered so far: 95%.
This means that it has the closest mass and insolation to terrestrial values.