Smithsonian Magazine on MSN13d
This Comprehensive Guide Will Answer the Questions You Have About Black Holes—and Spark Some New Ones
In 1915, physicist Albert Einstein put forth his theory of general relativity, which explained gravity as a product of the ...
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Listen to The Eerie 'Sounds' From A Black Hole, Captured by NASA
NASA created a haunting audio clip of sound waves rippling out of a supermassive black hole, located 250 million ... but a little bit angry. It was the first time these sound waves had been ...