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Scientists think we had two Suns. The dead one could be a Black Hole now

Updated: Aug 26, 2020

The Sun had a twin and there could be numerous undiscovered planets in the solar system. That’s what scientists from Harvard University think. 

In a paper published in The Astrophysical Journal Letters, Dr. Avi Loeb, Professor of Science at Harvard and undergraduate student Amir Siraj hypothesize the Sun may not have been alone during the early stages of the Solar System’s formation. 

“Most Sun-like stars are born with binary companions,” said Siraj.

A binary star system is two stars circling each other with planets revolving around them. Stars like our Sun typically form along with clusters of other stars. According to Loed and Siraj, the Sun’s twin would have had a similar mass, but it was thrown out of orbit by gravity from passing stars. 

“Passing stars in the birth cluster would have removed the companion from the Sun through their gravitational influence,” said Loeb. 

One of the key evidence that led to their proposition is the numerous amount of objects in the Solar System. 

“Binary systems are far more efficient at capturing objects than single stars,” added Loeb. 

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