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Photometry and spectroscopy are two techniques used in astronomy to analyze the properties of celestial objects.

Photometry measures the intensity of light emitted by an object at different wavelengths, providing information on its brightness and color. This technique is useful for studying the overall energy output and temperature of celestial objects.

Spectroscopy, on the other hand, breaks down the light emitted by an object into its component wavelengths, allowing astronomers to identify the chemical composition, temperature, and motion of the object. This technique is particularly useful for studying the chemical makeup and physical characteristics of celestial objects.

In summary, photometry focuses on the overall brightness and color of objects, while spectroscopy provides detailed information on their chemical composition and physical properties.

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