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Author Question: Astronomers have found the center of the Universe to be located in a. Earth b. the Sun c. ... (Read 82 times)

penguins

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on: Jul 27, 2018
Astronomers have found the center of the Universe to be located in
 
  a. Earth
  b. the Sun
  c. Sagittarius A
  d. the Virgo Cluster of galaxies
  e. no center is thought to exist.

Question 2

What do astronomers think is the eventual fate of a white dwarf?
 
  What will be an ideal response?


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amandanbreshears

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Reply #1 on: Jul 27, 2018
Answer to Question 1

e

Answer to Question 2

As it radiates energy into space, a white dwarf's temperature gradually falls, but it can't shrink any smaller because its degenerate electrons resist getting closer together. Degenerate matter is a very good thermal conductor, so as heat flows to the surface and escapes into space the white dwarf gets fainter and cooler, moving downward and to the right in the H-R diagram. Because a white dwarf contains a tremendous amount of heat, it needs billions of years to radiate that heat through its small surface area. Eventually, such objects may become cold and dark, so-called black dwarfs.


penguins

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Reply #2 on: Jul 27, 2018
TY


amandanbreshears

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Reply #3 on: Jul 27, 2018
You're welcome


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