If only 7% of those stars have habitable planets, a conservative estimate is that there could be as many as 300 million potentially habitable Earths (exoplanets) out there in the whole Milky Way alone.
The team calculated that at least one third of stars similar in mass and brightness to the sun have rocks like earth in their habitable zone.
The Kepler mission was named in honor of 17th-century German astronomer Johannes Kepler, who discovered the laws of planetary motion.
The Kepler Mission was launched in 2009 on a three-and-a-half year mission to monitor 1,50,000 stars in a patch of sky in the Milky Way.
It was NASA’s first planet-hunting mission, it discovered more than 2,600 of around 3,800 exoplanets.
It looked for tiny dips in starlight caused by an exoplanet passing in front of its home star.
Kepler’s formal goal was to measure a number called eta-Earth: the fraction of sunlike stars that have an Earth-size object orbiting them in the “goldilocks” or habitable zone, where it is warm enough for the surface to retain liquid water.