Astronomy & Space Science · AST-836
Spectroscopy & Spectral Analysis: Foundations
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Overview
Core model: Spectroscopy & Spectral Analysis
Spectroscopy separates light by wavelength so that continuum shape and spectral lines can be measured quantitatively. From those features astronomers infer composition, temperature, density, magnetic fields, rotation, turbulence, and line-of-sight velocity.
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References & evidence
Source library for this chapter
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- 01Radiation and Spectra — SummaryOpen source ↗
OpenStax Astronomy 2e
- 02Visible-Light Detectors and InstrumentsOpen source ↗
OpenStax Astronomy 2e
View claim-by-claim traceability3 verified claims
Laboratory transition wavelengths match astronomical lines, and repeated measurements reproduce velocities and abundance patterns.
supported · checked Sep 22, 2026Spectroscopy separates light by wavelength so that continuum shape and spectral lines can be measured quantitatively.
supported · checked Sep 22, 2026Atoms and molecules absorb or emit at quantized energies; motion Doppler-shifts lines; collisions and pressure broaden them; magnetic fields can split or polarize transitions.
supported · checked Sep 22, 2026