Describe the observational evidence for black holes that are discussed in Chapter 15

Describe the observational evidence for black holes that are discussed in Chapter 15.
Bonues:   Do a little research on the Internet (read a few articles) and summarize how astronomers were able to make this image of a black hole.

  •  Explain what a black hole is, describe its characteristics (size, mass), and give a detailed explanation on how they form. 
  • Make sure to explain what the Schwarzschild radius and event horizon are. 
  • Describe the two types of black holes.
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