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Author Question: Where did the cosmic microwave background (CMB) come from? a. photons emitted from the first ... (Read 74 times)

jwb375

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on: Jul 27, 2018
Where did the cosmic microwave background (CMB) come from?
 
  a. photons emitted from the first stars
  b. photons released from hydrogen in our galaxy
  c. light scattered by dust in our Solar System
  d. photons released when electrons and nuclei combined for the first time

Question 2

Why do supernova remnants have limited lifetimes?
 
  What will be an ideal response?


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Liddy

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

d

Answer to Question 2

They gradually mix with the interstellar medium and vanish.


jwb375

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

cici

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Reply 3 on: Yesterday
:D TYSM

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