The formation of clusters of stars and brown drawfs
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xxx years

The orbits of these objects are unstable and they are quickly ejected from the binary. Because they are ejected from the dense gas just after they are formed they are unable to increase their masses by attracting the residual gas and they become brown dwarfs with masses of less than 75 times that of Jupiter. Other objects are able to attact enough gas that they become proper stars.
(Click on main image for larger picture.)
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