How is the motion of stars relevant to Ghez's discovery?
Shows expansion of universe
Stars' life cycles
Indicates dark matter
Proves black hole existence
Answer
Black holes' existence is confirmed by the motion of stars. Andrea Ghez and Reinhard Genzel discovered that stars near the galactic center orbit a supermassive black hole. This finding offers strong evidence for the presence of black holes and lends credibility to Einstein's general relativity theory.
Stargazing Brilliance: The Andrea M. Ghez Astronomy Challenge
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