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Author Question: Which four moons are believed to have large bodies of liquid water? What will be an ideal ... (Read 30 times)

Wadzanai

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on: Jul 27, 2018
Which four moons are believed to have large bodies of liquid water?
 
  What will be an ideal response?

Question 2

Suppose an extrasolar planet's orbit around its star is edge-on to our line of sight. How is it detected, and what information can be obtained in this case?
 
  What will be an ideal response?


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coreycathey

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

Titan, Europa, Ganymede, and Enceladus

Answer to Question 2

Because the planet passes directly in front of its star, it blocks some of the star's light. The more light that is blocked, the bigger the planet must be, so by measuring how much of the star's light is lost during such transits we can learn the planet's diameter. The time between transits reveals the planet's period, the size of its orbit and possibly its mass. Combining the mass and size of the planet can yield its density.


Wadzanai

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Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

peter

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Reply 3 on: Yesterday
Excellent

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