All stars are born in pairs: Research

All stars are born in pairs: Research

Our sun had a twin, though not an identical twin, when it was born nearly 4.5 billion years ago, a team of researchers from UC Berkeley and the Harvard University’s Smithsonian Astrophysical has suggested.

A new analysis of available data by theoretical physicist Steven Stahler of UC Berkeley and astronomer Sarah Sadavoy from the Smithsonian Astrophysical Observatory suggested that all stars are born in pairs.

Astronomers have long been trying to locate a companion to our sun, which is called Nemesis. Some scientists also believe that Nemesis had kicked a huge asteroid that hit Earth and eliminated the dinosaurs. But, Nemesis has never been located.

Lead study author Sarah Sadavoy of the Smithsonian Astrophysical Observatory, said, “Based on our simple model, we say that nearly all stars form with a companion. The Perseus cloud is generally considered a typical low-mass star-forming region, but our model needs to be checked in other clouds.”

A number of stars have been known for having companions. For instance, our nearest neighbor, Alpha Centauri, is a triplet system. Binary star systems are also common.

Astronomers are of the view that our sun’s sibling might have escaped and mixed with other stars in the nearby region of the Milky Way, never to be seen again.