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What are the two current major approaches to detecting extrasolar planets indirectly??
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What are the two current major approaches to detecting extrasolar planets indirectly??

User Adelarsq
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Watching the light level dip as a planet moves across its star at a regular interval. Analyzing Spectra from the surface of the star in which matter may have been accreted onto it.. i. e. Carbon or heavier elements like tin.
User Gordon Bean
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