The Doppler Technique Only Provides a Measure of the Minimum

question 82

Multiple Choice

The Doppler technique only provides a measure of the minimum mass of a planet because

• A)only a small part of the planet's motion is measured.
• B)without a transit observation,the size and therefore density of the planet is unknown.
• C)we do not know the exact composition of the planet.
• D)only the motion of star toward the observer is measured,not the full motion.
• E)we do not have the technology to make a direct image of a planet yet.

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