In a binary star system one component is found to have, Ask an Expert

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In a binary star system, one component is found to have about 3 solar massesm the other about 7 solar masses. The 3 solar mass star is visible from Earth, but the 7 solar mass star is not. Theoretical consideration tell us that the 7 solar mass star must be a

A-neutron star

B-cool planetary object

C-white dwarf

D-black hole.

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