E3N5_Oct25[1] - Infrared Astronomy in Space: IRAS Digital...

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Infrared Astronomy in Space: IRAS
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Digital Spectra CCD detectors, coupled to spectrographs which are attached to large telescopes, produce accurate spectra. The display is not in the familiar bright lines seen through a spectroscope. The graph displayed is a series of dips in an otherwise curved jagged line. Digital Spectra
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Stellar Spectra: Examples of M and L Dwarf Stars
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Source Motion and Effect on Wavelength and Frequency
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A practical example in sound waves
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Schematic of the Doppler effect with Light
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When a star is moving directly toward or away from the Earth, its spectral lines shift. If the shift is toward longer wavelengths, it is called a red shift. If the shift is toward the shorter wavelengths, it is called a blue shift. This is known as the Doppler Effect. A red shift indicates the star is moving away from you and a blue shift indicates the star is moving toward you. Doppler Effect in Stellar Spectra
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E3N5_Oct25[1] - Infrared Astronomy in Space: IRAS Digital...

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