Discuss the causes, characteristics, and major features of black holes. Explain why the concept of a black hole does or doesn't seem reasonable to you and provide some rationale for your views?

1. Describe a planetary nebula and its cause?

2. What would the major impact on Earth be if the Earth remained in its present orbit and our Sun was 50% more massive than it is now?

3. Under certain circumstances a white dwarf will go type Ia supernova becoming much brighter for a short period of time. What special circumstance is required for this event to occur?

4. Why is a large mass required to have a type II supernova event?

5. If our Sun maintained its current mass, but suddenly collapsed and became a block hole, how would Earth's orbit be affected?