Which of the Following Methods Has Been the LEAST Successful

question 25

Multiple Choice

Which of the following methods has been the LEAST 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 Doppler shifts in the spectra of the parent stars
• C) detection of brightness changes in a star as a planet passes in front of it
• D) detection of reflected starlight

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