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Past Exam for PHY 1455 - Descriptive Astronomy with Russell at Baylor (BU)

Exam Information

Material Type:Exam 3
Professor:Russell
Class:PHY 1455 - Descriptive Astronomy
Subject:Physics
University:Baylor University
Term:Spring 2010
Keywords:
  • H-R Diagram
  • Binary Stars
  • Temperature
  • Star System
  • Neighborhood
  • Chemical Composition
  • Surface Temperature
  • White Dwarf
  • High Mass Stars
  • Vertical Axis
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Sample Document Text

Test 3 1. Which of this is the most important indicator of how a star will µevolve¶? surface temperature chemical composition mass radius (size) 2. The total amount of energy that a start emits is called its ______. -- Luminosity 3. You are observing two stars with the same luminosity. Star A is 5 light years from the earth; star B is 50 light years. What result do you expect for their brightness¶s? -- The brightness of A will be greater than B. 4. Locate on the H-R Diagram: Stars about as large as the planet earth. -- lower left 5. During the horizontal branch phase of its life, a star fuses: -- helium to carbon in its core 6. On the H-R diagram: what is the correct quantity for the vertical axis? -- Luminosity 7. High mass stars are those above _____ solar masses. -- 8 8. The part of the Sun we see is called _______. --photosphere 9. What is the heaviest element that the most massive stars can produce in their cores during their normal lives? -- Iron 10. Which event marks the µbirth¶ of a star? --Fusio...

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