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? i need two paragraph for this discussion. and need two differen answer for this question.
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?