circumstellar dust

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• Circumstellar dust — is astronomical dust around a star. It can be in the form of a spherical shell or a disk, e.g. an accretion disk. Circumstellar dust can be responsible for significant extinction and is usually the source of an infrared excess for stars that have …   Wikipedia

• Circumstellar envelope — is the part of the star, having roughly spherical shape and not gravitationally bound to the star core. Usually circumstellar envelopes are formed from the dense stellar wind or present before formation of the star. Circumstellar envelopes of the …   Wikipedia

• circumstellar — adjective Date: 1951 surrounding or occurring in the vicinity of a star < circumstellar dust > …   New Collegiate Dictionary

• Circumstellar disk — A circumstellar disk is a torus, pancake or ring shaped accumulation of matter composed of gas, dust, planetesimals, asteroids or collision fragments in orbit around a star. Around the youngest stars, they are the reservoirs of material out of… …   Wikipedia

• Cosmic dust — Space dust redirects here. For other uses, see Space dust (disambiguation). Porous chondrite interplanetary dust particle. Cosmic dust is a type of dust composed of particles in space which are a few molecules to 0.1 µm in size. Cosmic dust… …   Wikipedia

• Comet dust — refers to cosmic dust that originates from a comet. Comet dust can provide clues to comets origin. Dust and comet origin Microscopic view of comet dust particle The models for the origin of comets are[1]: 1) the interstellar model, 2) the solar… …   Wikipedia

• Color–color diagram — In astronomy, color–color diagrams are a means of comparing the apparent magnitudes of stars at different wavelengths. Astronomers typically observe at narrow bands around certain wavelengths, and objects observed will have different brightnesses …   Wikipedia

• Eta Corvi — η Corvi An artists conception of many Kuiper Belt objects and comets flying through the Eta Corvi system and producing a Late Heavy Bombardment. Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)… …   Wikipedia

• AU Microscopii — Starbox begin name=AU Microscopii Starbox image caption=Microscopii s debris disk. Starbox observe epoch=J2000 ra=RA|20|45|09.5318 dec=DEC| 31|20|27.238 appmag v=8.61 constell=Microscopium Starbox character class=M1 Ve b v=1.45 u b=1.01… …   Wikipedia

• Herbig Ae/Be stars — are pre main sequence stars young ( …   Wikipedia

• Circular polarization — The electric field vectors of a traveling circularly polarized electromagnetic wave. In electrodynamics, circular polarization[1] of an electromagnetic wave is a polarization in which the electric field of the passing wave does not change… …   Wikipedia