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MMLU / Which of the following methods has led to the most discoveries of massive…

Problem

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question

Which of the following methods has led to the most discoveries of massive planets orbiting near their parent stars?

choices

  1. detecting the gravitational effect of an orbiting planet by looking for the Doppler shifts in the star's spectrum
  2. detecting the shift of the star's position against the sky due to the planet's gravitational pull
  3. detecting a planet ejected from a binary star system
  4. detecting the starlight reflected off the planet

subject

astronomy

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