How do scientists use radial velocity in the wobble method to find planets?
a. scientists measure the radial velocity of the star spinning on its axis to determine if it has a planet orbiting it
b. scientists use radial velocity to measure the changes in the luminosity of the star to determine if there is a planet orbiting it
c. scientists can measure the radial velocity of a star to determine if a planet is orbiting a star, and thus causing the side to shift
d. scientists can measure the radial velocity of the planet to see if it is orbiting a star​



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