What Type of Observation Can Astronomers Use to Measure the Composition

question 70

Multiple Choice

What type of observation can astronomers use to measure the composition of extrasolar planet atmospheres?

• A)measurements of the host star's velocity throughout an orbital cycle
• B)comparisons of spectra when planets are in front of or are eclipsed by their host stars
• C)combination of a transit observation and a Doppler shift measurement
• D)measurement of how frequently the planet blocks the host star's light

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