Submitted by karmagheden t3_11yjstz in space
cratermoon t1_jd9hzvx wrote
Reply to comment by boundegar in Research team finds indirect evidence for existence of dark matter surrounding black holes by karmagheden
As noted in the other comment, this isn't the common mechanical friction. It's the same "friction" of the moon's gravity causing the earth's rotation to slow down at a barely perceptible rate.
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