How do we know there is a black hole at the center of our galaxy?
Yassmin Issufo
1 min
Success & Inspiration
Description
<p>A description of the main piece of evidence supporting the hypothesis that there is a black hole at the center of our galaxy.</p>
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brenda_lane
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How do we know there is a black hole at the center of our galaxy?
Yassmin Issufo