Seeing the invisible: How Nobel laureate Andrea Ghez found the supermassive black hole in the Milky Way's center

Another great story in historical astronomy. Once again it begins with something like, "Hmmm, that's odd." The weak amount of radio emissions from our galaxy's center wasn't my first guess on how it began. Each step up the mountain was recognized by her, especially technology, that allowed her to reach the summit.

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