1. Most black holes, even though they emit no light themselves, have been detected in various X-ray surveys. Explain the process that leads to X-ray emission in the

near vicinity of the Black Hole.
2. Our Galaxy appears to be long overdue for the occurrence of another Supernova. Find some information on Supernova rates for galaxies like ours and report those

results. When was the last Supernova to occur in our galaxy? Based on the supernova rate, do you think that our Galaxy has been deficient in the production of

supernova over the last few hundred years?
3. The Schwarzschild radius (e.g. the radius of the event horizon) of a 1 solar mass black hole is 3 kilometers. Calculate (show your work) the Schwarzschild radius of

a 1 earth mass black hole