Gam

Its story

Gamma Virginis, also called Porrima after the Roman goddess of prophecy, is one of the most famous binary systems in the northern sky. At 38.6 light-years, two near-twin yellow-white suns orbit each other in a dance lasting just over a century and a half. To nineteenth-century astronomers it became the decisive proof that double stars obey the same gravitational laws that govern the planets around the Sun.