Vogel , Hermann Karl
(1842–1907) German astronomer
Born at Leipzig in Germany, Vogel began as an assistant at the observatory there. He later directed a private observatory and finally moved to Potsdam to work in the new astrophysical observatory, of which he became director in 1882. He was one of the earliest astronomers to devote himself almost exclusively to spectroscopy. His first discovery came in 1871 when he showed that the solar rotation could be measured using spectroscopic Doppler effects, obtaining identical results to those achieved using sunspots as markers.
In 1890 he came across some unusual stellar spectra – in particular that of the variable star Algol. He found that some stars seemed to be both advancing and receding, for their spectral lines periodically doubled showing both a red and a blue shift. He correctly interpreted this as indicating a binary system with two stars so close together that they could not be separated optically, with one star advancing and one receding. When one star is eclipsed by its companion just one spectra will be visible, but as the other emerges the spectral line will appear to double only to disappear again in the next eclipse. Such systems are known as eclipsing binaries.

Scientists. . 2011.

Look at other dictionaries:

  • Vogel, Hermann Karl — ▪ German astronomer born April 3, 1842, Leipzig died Aug. 13, 1907, Potsdam, Ger.       German astronomer who discovered spectroscopic binaries double star systems that are too close for the individual stars to be discerned by any telescope but,… …   Universalium

  • Vogel, Hermann Karl — ► (1842 1907) Astrónomo alemán. Descubrió las estrellas binarias espectroscópicas y demostró que la estrella Algol tenía una acompañante oscura del tamaño del Sol …   Enciclopedia Universal

  • Hermann Karl Vogel — Hermann Carl Vogel 1905 Hermann Carl Vogel (* 3. April 1841 in Leipzig; † 13. August 1907 in Potsdam) war ein deutscher Astrophysiker. Er war von 1882 bis 1907 Direktor des Astrophysikalischen Observatoriums Potsdam. Ihm gelangen weit reichende… …   Deutsch Wikipedia

  • Vogel — Vogel, Hermann Karl Vogel, Hermann Wilhelm …   Enciclopedia Universal

  • Vogel [3] — Vogel, Hermann Karl, Astronom und Astrophysiker, geb. 3. April 1842 zu Leipzig, seit 1882 Direktor des Astrophysikalischen Observatoriums in Potsdam; schrieb über Nebelflecke, Planetenspektra etc …   Kleines Konversations-Lexikon

  • Hermann C. Vogel — Hermann Carl Vogel 1905 Hermann Carl Vogel (* 3. April 1841 in Leipzig; † 13. August 1907 in Potsdam) war ein deutscher Astrophysiker. Er war von 1882 bis 1907 Direktor des Astrophysikalischen Observatoriums Potsdam. Ihm gelangen weit reichende… …   Deutsch Wikipedia

  • Hermann Carl Vogel — 1905 Hermann Carl Vogel (* 3. April 1841 in Leipzig; † 13. August 1907 in Potsdam) war ein deutscher Astrophysiker. Er war von 1882 bis 1907 Direktor des Astrophysikalischen Observatoriums Potsdam. Ihm gelangen weit reichende Entdeckungen im… …   Deutsch Wikipedia

  • Hermann Höcherl — en 1961. Mandats …   Wikipédia en Français

  • Vogel — Vogel, 1) Karl, Schulmann, geb. 19. Juli 1795 in Stadtilm, gest. 25. Nov. 1862 in Leipzig, studierte in Jena Theologie und Philologie, wurde 1815 Lehrer, später Mitleiter einer Erziehungsanstalt in Tharandt, 1824 Direktor der höhern Stadtschule… …   Meyers Großes Konversations-Lexikon

  • Hermann Hesse — in Rüschlikon im April 1926[1] …   Deutsch Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”