Which of the following methods has been the MOST successful in ...

[Tazate]

Which of the following methods has been the MOST successful in detecting extrasolar planets around other star systems?
 
  A) regular changes in the positions of the parent stars with respect to more distant stars as they move across the sky
  B) detection of brightness changes in a star as a planet passes in front of it
  C) detection of Doppler shifts in the spectra of the parent stars
  D) detection of reflected starlight

Question 2

Which of the following operations will not change a vector?
 
  A) Translate it parallel to itself.
  B) Rotate it.
  C) Multiply it by a constant factor.
  D) Add a constant vector to it.
  E) Subtract a constant vector from it.

[otokexnaru]

Answer to Question 1

B

Answer to Question 2

A

[Tazate]

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[otokexnaru]

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