1. What is a planetary nebula?2. What would the major impact be 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 nova 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 supernova event?5. How are neutron stars created?