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Author Question: In the Ptolemaic system, Venus should not show phases. Indicate whether the statement is true or ... (Read 69 times)

c0205847

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on: Jul 27, 2018
In the Ptolemaic system, Venus should not show phases.
 
  Indicate whether the statement is true or false

Question 2

The Kepler mission has searched for Earth-like planets by looking for the dip in the brightness of a star as a (potential) planet transits across it.
 
  Why will this technique actually miss the vast majority of planets around the stars it observes?


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Danny Ewald

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

FALSE

Answer to Question 2

By searching for transits, Kepler can only detect those planets with orbits cross our line of sight to the star. This means the orbit must be very close to edge-on. Because planetary systems around other stars will have random orientations to us, most planets will not cross our line of sight and cause a dip in the star's brightness.


c0205847

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Reply 2 on: Jul 27, 2018
:D TYSM

diana chang

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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