Sara Seager

This artist's rendition provided by NASA shows Kepler-69c, a super-Earth-size planet in the habitable zone of a star like our sun, located about 2,700 light-years from Earth in the constellation Cygnus. (AP Photo/NASA/Ames/JPL-Caltech)

Study: 8.8 billion Earth-size, just-right planets

WASHINGTON (AP) — Space is vast, but it may not be so lonely after all: A study finds the Milky Way is teeming with billions of planets that are about the size of Earth, orbit […]

11/04/2013