Nasa said its planet-hunting telescope has found 10 new planets outside our solar system that are probably the right size and temperature to potentially have life on them.
As the Kepler telescope finished its main mission, Nasa announced that it has seen a total of 49 planets in the Goldilocks zone for possible life.
And it only looked in a tiny part of the galaxy.
Kepler scientist Mario Perez said that means that "we are probably not alone" because four years of data show how common Earth-like planets can be.
Outside scientists agreed that this is a boost in the hope for life elsewhere.
Nasa said several of the 10 new potentially habitable planets circle stars similar in size to our sun.
It also announced 219 new planets.