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quiz11 - Quiz 11 1)The first planets around other Sun-like...

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Quiz 11 1)The first planets around other Sun-like stars were discovered A)by Galileo following the invention of the telescope. B)at the turn of last century. * C)about a decade ago. D)at the turn of this century. E)by Huygens, following his realization that other stars are Suns. 2)Approximately how many other planetary systems have been discovered to date? 3)Which of the following methods has led to the most discoveries of massive planets orbiting near their parent stars? * A)detecting the gravitational effect of an orbiting planet by looking for the Doppler shifts in the star’s spectrum B)detecting the shift of the star’s position against the sky due to the planet’s gravitational pull C)detecting a planet ejected from a binary star system D)detecting the infrared light emitted by the planet E)detecting the starlight reflected off the planet
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