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Author Question: Some globular clusters have three main sequence tracks. This indicates: A) three different ... (Read 56 times)

dbose

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  • Posts: 597
on: Jul 27, 2018
Some globular clusters have three main sequence tracks. This indicates:
 
  A) three different stellar compositions.
  B) three episodes of star formation, separated by billions of years.
  C) stars evolve through three different mechanisms.
  D) the stars were observed from three different telescopes.

Question 2

Compared to optical telescopes, radio telescopes are built large because:
 
  A) they're less expensive to make than optical telescopes.
  B) radio photons don't carry much energy.
  C) atmospheric turbulence is more of a problem.
  D) radio sources are harder to find.
  E) radio waves are absorbed by the atmosphere.


tanna.moeller

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

A

Answer to Question 2

B


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