Assertion: black hole's center | /r/Synonym | sagittarius a
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Source sentences:
text: The center of our galaxy is called Sagittarius A*, a massive source of radio waves that is believed to be a black hole that measures 22,5 million kilometers (14 million miles) across – about the size of Mercury’s orbit.
text: The Milky Way hosts its own supermassive black hole at its center known as Sagittarius A