The Doppler Technique Can Be Used to Measure the Eccentricity

question 72

Multiple Choice

The Doppler technique can be used to measure the eccentricity of a planet's orbit by

• A)measuring the time it takes for the star's line- of- sight velocity to cycle from peak to peak, and using Newton's version of Kepler's Third law.
• B)measuring the amount by which the starlight is reduced when the planet transits.
• C)measuring the asymmetries in the velocity curve.
• D)measuring the speed at which the star orbits the mutual center- of- mass of the star and planet, and using Newton's theory of gravity.

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