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Author Question: Where do we find our star on the H-R diagram? A) In the middle of the main sequence B) On the ... (Read 45 times)

Mimi

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on: Jul 27, 2018
Where do we find our star on the H-R diagram?
 
  A) In the middle of the main sequence
  B) On the far left of the main sequence
  C) With the red giants
  D) On the lower left

Question 2

Is there enough luminous matter to stop the universe's expansion? Is there enough dark matter? What else is there?
 
  What will be an ideal response?


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jaykayy05

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

A

Answer to Question 2

There seems to be only about 1-3 of the amount of luminous matter needed to stop the expansion of the universe. With dark matter included, the number comes up to perhaps 20-30 (o = .2-.3 ) of the amount needed, but still not enough. But the dark energy may in fact add in enough to give us a critical universe, with 73 of it in that new form.


Mimi

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

recede

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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