© ESOOrange stars live longer than the sun and are less violent than red dwarf stars, making the planets around them good candidates for hosting life
The universe's best real estate for life may be around stars a little less massive than the sun, called orange dwarfs, according to a new analysis. These stars live much longer than sun-like stars, and have safer habitable zones - where liquid water can exist - than those of lighter red dwarf stars.
Stars similar in mass to the sun, categorised as a yellow dwarf, have received the most attention from planet hunters. But recent research suggests orange dwarfs may provide an even better hunting ground for life-bearing planets.
Edward Guinan of Villanova University in Pennsylvania, leads a team that has been studying how the properties of stars vary with mass. The team is using observations from a variety of sources, such as archival measurements from the ROSAT X-ray satellite, and more recent measurements from ground-based telescopes.