habitable planets

habitable planets

graph for habitable planets

The graphic shows optimistic and conservative habitable zone boundaries around cool, low mass stars. The numbers indicate the names of known Kepler planet candidates. Yellow color represents candidates with less than 1.4 times Earth-radius. Green color represents planet candidates  between 1.4  and 2 Earth radius. Planets with "+" are not in the habitable zone.

Image: Penn State