Doppler measurements have been used to confirm the existence of Earth - size planets discovered by Kepler in habitable zones around stars smaller and dimmer than the sun. (discovermagazine.com)
(See a larger, interactive animation of the orbits of Stars A and B, and a possibly disrupted habitable zone around Star A.) Useful star catalogue numbers and designations include: Alp or Alf CMa, 9 CMa, HR 2491, Gl 244 A, Hip 32349, HD 48915, BD - 16 1591, SAO 151881, FK5 257, LHS 219, and ADS 5423 A. (members.nova.org)
NASA's Kepler mission's principal investigator, Bill Borucki, talks about the search for exoplanets that might be in habitable zones around their stars. (scientificamerican.com)