What might indicate a black hole is present?

1 Answer
chandramohanPanakkal
Jan 16, 2016

Speed of stars orbit the black hole near bye.
When matter falls to a black hole x rays are produced from the accretion disk.This can be seen by space based X ray telescopes like Chandra.

Explanation:

as explained above we can know their presence by indirect observations.black holes does not emit any radiation.

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