Pollard A quartet of Earth-like worlds, each about 20% to 30% the size of our planet, circle one of our ... with a mass around one-sixth that of the sun. At 5.97 light-years from Earth, it is ...

The discovery of a rogue planet with a disk around it indicates the presence of "mini planets" or moons ... system are gravitationally bound to the sun. But rogue planets move through interstellar ...

While this fraction is relatively low given how common super-Earths and mini-Neptunes are, it implies an occurrence rate of approximately one Earth-like planet per 300 sun-like stars." Looking ...