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Author Question: How can close analysis of the spectra of quasars let us map the whole universe? What will be an ... (Read 71 times)

luvbio

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on: Jul 27, 2018
How can close analysis of the spectra of quasars let us map the whole universe?
 
  What will be an ideal response?

Question 2

Compared to a type A0 star, a type A9 star is
 
  A) bluer.
  B) more massive.
  C) cooler.
  D) hotter.
  E) more luminous.


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samiel-sayed

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

In addition to the emission lines made by the quasar, absorption lines reveal gas clouds that lie between us and the quasar. The closer clouds show smaller redshifts, so their distances and structures can also be mapped.

Answer to Question 2

C


luvbio

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Reply 2 on: Jul 27, 2018
Wow, this really help

peter

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Reply 3 on: Yesterday
Gracias!

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