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- 1. Multiple Choice
Currently, the Sun is fusing ___hydrogen into heliumhelium into hydrogenhelium into carbonhydrogen into carbon - 2. Multiple ChoiceEventually, the Sun will fuse helium into carbon, along with a dash of ___neon and lithiumsilicon and neonoxygen and neonoxygen and silicon
- 3. Multiple ChoiceThe Sun's power will be switched off once the core is nearly pure ___heliumlithiumcarbonsilicon
- 4. Multiple ChoiceHow long from now until the Sun’s outer layers are gone and our star is just its core?about 8 million yearsabout 80 million yearsabout 8 billion yearsabout 80 billion years
- 5. Multiple ChoiceOnce helium fusion stops, the dominant force in supporting the core of a star is called ___neutron degradation pressurephoton depravity pressureelectron degeneracy pressureproton dissoluteness pressure
- 6. Multiple ChoiceThe Sun, when its core has contracted to about the size of Earth, will be classified as ___a white dwarfa blue dwarfa white subgianta blue subgiant
- 7. Multiple ChoiceA single cubic centimeter of a white dwarf, the size of a six-sided die, has a mass of ___a thousand grams — ten metric tonsa million grams — ten metric tonsa thousand grams — one metric tona million grams — one metric ton
- 8. Multiple ChoiceIf you have a mass of 75 kg, and you stood on the surface of a white dwarf, you’d weigh ___7.5 tons75 tons750 tons7,500 tons
- 9. Multiple ChoiceBecause white dwarfs are so small, they’re actually ___quite coolquite faintquite hotquite bright
- 10. Multiple ChoiceAn expanding, glowing shell of gas around an aging star is called ___a dwarf nebulaa planetary nebulaa dwarf nimbusa planetary nimbus
- 11. Multiple ChoiceThe first planetary nebula was discovered in 1764 by the French astronomer ___William HerschelCharles MessierEdwin HubbleHarlow Shapley
- 12. Multiple ChoiceOne of the biggest planetary nebulae in the sky is M 27 - the 27th object on ___the Mercator projectionthe Mesopotamia mapMaxwell's star chartMessier’s list
- 13. Multiple ChoiceSome planetaries look like soap bubbles, which is what you'd expect when you look at ___an expanding shell of gasan contracting shell of gasan expanding shell of dusta contracting shell of dust
- 14. Multiple ChoiceWhat technology revealed faint structures, such as jets and tendrils, in planetary nebulae?ultraviolet telescopesinfrared telescopesdigital detectorsanalog detectors
- 15. Multiple ChoiceIf a dying star has a companion, what force can shape the solar wind so that it's not spherical?electron degeneracy forcegravitational forcecentripetal forcecentrifugal force
- 16. Multiple ChoiceMany weird and fantastic shapes in planetaries may be due to progenitor stars that have ___expelled other starsexpelled their planetsswallowed their planetsswallowed other stars
- 17. Multiple ChoiceWhich element, originally dubbed nebulium, causes planetary nebulae to glow green?hydrogenheliumoxygennitrogen
- 18. Multiple ChoiceWhich elements can cause planetary nebulae to glow red?oxygen, nitrogen, and sulfurhydrogen, nitrogen, and sulfurhydrogen, oxygen, and sulfurhydrogen, nitrogen, and oxygen
- 19. Multiple ChoiceHow long can the glowing gases of a planetary nebula be seen, before they fade?a few yearsa few thousand yearsa few million yearsa few billion years
- 20. Multiple ChoiceWhen the Sun becomes a white dwarf, it most likely will ___go quietly, without a lot of visible fanfarecreate a planetary nebulaemake the surrounding gas glowexplode in a supernova
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