What is the primary technique called that converts a simple point of light into a detailed physical profile of a star?

Answer

Astronomical spectroscopy

Astronomical spectroscopy is the powerful technique that hinges on splitting light into its component parts to decode fundamental physical data about the source, transforming a point of light into a detailed profile.

What is the primary technique called that converts a simple point of light into a detailed physical profile of a star?

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What do spectra tell us about stars? - YouTube

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