Vogel, Hermann Carl (1841–1907)
Vogel pioneered the use of spectroscopy and photography in astronomy. Relying on the Doppler shift of spectral lines, he measured the solar rotation and showed that the solar photosphere shared the rotational motion inferred from sunspot observations. He also carried out some of the first spectroscopic studies of other planets in the solar system. Making use of photography in spectroscopic studies, he was among the first astronomers to measure the radial velocities of bright stars, and to attempt the classification of stars on the basis of their spectra. His spectrophotographic studies of the stars Algol and Spica lead him to the discovery of spectroscopic binaries, and allowed him to estimate some of the orbital parameters of these binary systems.
Related category• ASTRONOMERS AND ASTROPHYSICISTS
Source: High Altitude Observatory
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