Diagram illustrating how spectral lines give away galaxy distances. Astronomers have known for some time that there is a correlation between a galaxy’s spectrum and its distance from Earth. The further away the given galaxy, the further the lines in its spectrum are shifted towards longer wavelengths – an effect known as redshift. Astronomers have calibrated this effect, enabling them to estimate the distances to galaxies based on their spectra alone. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Garlick, Mark |
Bildgröße: | 5572 px × 3137 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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