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Home Q & A Board Science-Related Homework Help Physics Astronomy
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shanell610 shanell610
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6 years ago
The density of the Universe comes from baryonic matter, non-baryonic dark matter, and dark energy. What percentage of the density of the Universe do each of the three represent?
 
  What will be an ideal response?

Question 2

The Hertzsprung-Russell Diagram is a plot for stars using absolute magnitude versus temperature.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 3

When an astronomer measures the redshift to a distant galaxy, exactly what physical process is being measured?
 
  What will be an ideal response?

Question 4

The spectral classification of stars started with the amount of hydrogen present in their spectra, but a better method now uses the amount of oxygen in the star's spectra.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 5

How is antimatter created?
 
  What will be an ideal response?
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transfertransfer
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6 years ago
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shanell610 Author
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#2
6 years ago
What an excellent community, thanks for answering
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