Many stars in our galaxy exist in pairs. Now scientists are finding clues that our Sun may once have had a companion of its ...

Alpha Centauri, located approximately 4.37 light-years (1 light-year is the distance light travels in one year, about 9.46 ...

Alpha Centauri, the closest star system to Earth, is home to three stars, one of which is so tantalizingly similar to our sun that many experts speculate that its solar system might contain ...

Alpha Centauri is about 4.4 light-years (roughly ... Using either a solar sail, which is propelled by the sun's light, or a ...

Only the three-star Alpha Centauri star system ... of the relative distances between the nearest stars and the Sun. Barnard’s ... [+] star is the second closest star system to the Sun, and ...