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15 February, 16:45

What must be present for scientists to detect black holes?

. a cloud of dust

. a gamma ray burst

. the loss of a star

. the force of gravity

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Answers (2)
  1. 15 February, 17:42
    +1
    D is the answer you are looking for!

    Explanation:

    Have a blessed day! <3
  2. 15 February, 17:53
    0
    D. the force of gravity

    Explanation:

    Black holes are detected as surrounding material (like gas) is funnelled by the force of gravity into a disk around the black hole. The gas molecules in the disk swirl around the black hole so fast that they heat up and emit X-rays. These X-rays can be detected from Earth.
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