What star in the Milky Way passes all five tests scientists require for it to be a candidate for extraterrestrial life?
Alpha Centauri A
Alpha Centauri A (α Cen A) has 110 percent of the mass and 151.9 percent of the luminosity of the Sun, and Alpha Centauri B (α Cen B) is smaller and cooler, at 90.7 percent of the Sun’s mass and 44.5 percent of its visual luminosity.
During the pair’s 79.91-year orbit about a common centre, the distance between them varies from about that between Pluto and the Sun to that between Saturn and the Sun.
|Alpha Centauri A|
|Right ascension||14h 39m 36.49400s|
|Declination||–60° 50′ 02.3737″|
|Apparent magnitude (V)||+0.01|