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SPECTRAL RESOLUTION
The ability to distinguish between close wavelengths in a spectrum.

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INFRARED SPECTROSCOPY
Used to study cool objects and planetary atmospheres.

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X-RAY SPECTROSCOPY
A method for studying extremely hot cosmic objects like black holes.

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TELLURIC LINES
Spectral absorption features caused by Earth’s atmosphere.

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FLUORESCENCE IN SPACE
The emission of light by atoms absorbing high-energy photons.

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SPECTROPOLARIMETRY
The study of polarized light in spectra to understand magnetic fields in space.

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LYMAN SERIES
Ultraviolet spectral lines of hydrogen.

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BALMER SERIES
A set of hydrogen spectral lines visible in optical light.

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SPECTRAL CLASSIFICATION
Categorizing stars based on their spectral lines and temperature.

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REDSHIFTED SPECTRUM
A spectrum where lines are shifted to longer wavelengths due to cosmic expansion.