Which of the Following Methods Uses Astrometry to Detect Extrasolar

question 56

Multiple Choice

Which of the following methods uses astrometry to detect extrasolar planets around other star systems?

• A) detection of Doppler shifts in the spectra of the parent stars
• B) detection of reflected starlight
• C) detection of brightness changes in a star as a planet passes in front of it
• D) regular changes in the positions of the parent stars with respect to more distant stars as they move across the sky

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