Assertion: black hole's matter | /r/HasProperty | proposed by german astronomer
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Source sentences:
text: So, should you then find yourself at the event horizon — the point at which light and matter can only pass inward, as proposed by the German astronomer Karl Schwarzschild
text: So, should you then find yourself at the event horizon — the point at which light and matter can only pass inward, as proposed by the German astronomer Karl Schwarzschild