Astronomy Review 1. What are the best seeing conditions for using an optical telescope? 2. What are two types of optical telescopes? 3. Describe the structure of the two types of optical telescopes? 4. Why do we use other than optical telescopes? 5. What three things do optical telescopes do for an astronomer? 6. What are the advantages of using an Earth-based telescope? 7. What are the disadvantages of using an Earth-based telescope? 8. What are the advantages of using a space-based telescope? 9. What are the disadvantages of using a space-based telescope? 10. Know where the different types of electromagnetic waves are on the spectrum. E.g.What are the shortest waves on the spectrum? Where are the radio waves relative to the visible light part of the spectrum/ microwave? Gamma rays? 11. What type of star is our sun? 12. What causes Earth’s seasons? 13. What is a solar eclipse? 14. What is a lunar eclipse? 15. What is the most dense object in the universe? 16. Know all the definitions : Black hole Red Giant binary star Nova Pulsar Galaxy Super nova Quasar Nebula White dwarf Neutron star 17. Be able to answer all these questions: A. How big & hot is our sun? B. How does our sun compare in size & temp. to other stars? C. What phase in the life cycle of a star is our sun in right now? D. What is the composition of our sun? E. What is the next phase of our sun’s life cycle? And how long until it gets there? F. How long is the typical lifetime of a star?