Question on Quora: Why did we think black holes existed before we even observed them?

Question on Quora: Why did we think black holes existed before we even observed them? https://www.quora.com/Why-did-we-think-black-holes-existed-before-we-even-observed-them?ch=15&oid=107874401&share=af2696e8&srid=ulXsr&target_type=question

About Wirral In It Together

Campaigner for open government. Wants senior public servants to be honest and courageous. It IS possible!
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