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Author Question: Suppose we discover a super-Earth at a distance of 10AU from its star. Should we consider it to be ... (Read 68 times)

Tazate

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on: Jul 27, 2018
Suppose we discover a super-Earth at a distance of 10AU from its star. Should we consider it to be potentially habitable?
 
  A) Yes, its atmosphere may contain substantial amounts of greenhouse-type gases that can keep the planet warm beyond the usual boundaries assumed for habitable zones.
  B) Yes, because its host star must be much bigger in order to have a super-Earth, so it will be much hotter there.
  C) No, only planets at approximately 1AU will ever be potentially habitable.
  D) No, greenhouse gases freeze-out at those distances.

Question 2

Collisions between galaxies is thought to
 
  A) have stopped about 5 billion years ago.
  B) be commonplace.
  C) have never occurred.
  D) be extremely rare.
  E) have only occurred between 10 and 15 billion years ago.


stillxalice

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

A

Answer to Question 2

B


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Tazate

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Reply #2 on: Jul 27, 2018
TY


stillxalice

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Reply #3 on: Jul 27, 2018
You're welcome


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