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Loading contentA ground-based technique that resolves thousands of individual spectral lines and uses the planet's changing Doppler shift along its orbit to separate its light from the star's and the Earth's atmosphere. Cross-correlating against molecular templates detects specific gases and even measures atmospheric winds; it is a headline science case for the coming extremely large telescopes.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
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