gaseous nebulae

См. также в других словарях:

• galaxy — /gal euhk see/, n., pl. galaxies. 1. Astron. a. a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. b. (usually cap.) See Milky Way. 2. any large and brilliant or impressive… …   Universalium

• nebula — nebular, adj. /neb yeuh leuh/, n., pl. nebulae / lee , luy /, nebulas. 1. Astron. a. Also called diffuse nebula. a cloud of interstellar gas and dust. Cf. dark nebula, emission nebula, reflection nebula …   Universalium

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• Astronomical spectroscopy — is the technique of spectroscopy used in astronomy. The object of study is the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other celestial objects. Spectroscopy can be used to derive many… …   Wikipedia

• Nebulosa planetaria — La Nebulosa Ojo de Gato. Imagen en falso color (visible y rayos X) tomada por el Telescopio espacial Hubble. Una nebulosa planetaria …   Wikipedia Español

• Donald Howard Menzel — by Babette Whipple Born April 11, 1901 …   Wikipedia

• Donald Edward Osterbrock — (* 13. Juli 1924; † 11. Januar 2007) war ein US amerikanischer Astronom. Osterbrock wuchs in Cincinnati (Ohio) auf. Er war Student von Subramanyan Chandrasekhar an der University of Chicago. Später arbeitete er an der Princeton University, der… …   Deutsch Wikipedia

• Donald Osterbrock — Donald Edward Osterbrock (* 13. Juli 1924; † 11. Januar 2007) war ein US amerikanischer Astronom. Osterbrock wuchs in Cincinnati (Ohio) auf. Er war Student von Subramanyan Chandrasekhar an der University of Chicago. Später arbeitete er an der… …   Deutsch Wikipedia

• Osterbrock, Donald Edward — ▪ 2008  American astrophysicist born 1925 , Cincinnati, Ohio died Jan. 11, 2007 , Santa Cruz, Calif. was conducting research as a graduate student when he discovered the spiral arm structure of the Milky Way, and he later uncovered the processes… …   Universalium

• Nebulium — Cat s Eye Nebula (NGC 6543) Nebulium was a proposed element found in a nebula by William Huggins in 1864. The strong green emission lines of the Cat s Eye Nebula, discovered using spectroscopy, led to the postulation that an as yet unknown… …   Wikipedia

• chemical element — Introduction also called  element,         any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed.       This article considers the… …   Universalium