- What is a black hole?
- What would it be like to visit a black hole?
- Do black holes really exist?
- What causes gamma ray bursts?
- What is in the center of the milky way?
- What is the mass of the object in the center of our galaxy?
- Who was John Michell?
- Who was Pierre-Simon Laplace?
- Who was Karl Schwarzschild?
- What is the Schwarzschild radius of Earth?
Hint: Search for black holes in Wikipedia
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