interstellar matter
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Interstellar Matter
Related Category: Astronomy: General
matter in a galaxy between the stars, known also as the interstellar medium.
Interstellar Matter
Interstellar gas (99%) and dust (1%). The observed density of the interstellar medium is about 1-5 atoms per cm3. The two other components of the interstellar medium are magnetic fields and cosmic-ray electrons.
Interstellar Matter - Gas and dust in the space between the stars
Interstellar Reddening - The obscuration, by interstellar dust particles, of blue starlight more strongly than red starlight ...
1. Interstellar matter is quite evenly distributed throughout the Milky Way Galaxy. (Hint)
2. In the vicinity of the Sun there is about as much mass in the form of interstellar matter as in the form of stars. (Hint) ...
STARS AND INTERSTELLAR MATTER
Galaxies can be broadly classified into early-type galaxies, which consist predominantly of old stars, and late-type galaxies, which contain old stars, young stars, ...
Interstellar Matters. 1989, Springer-Verlag. A history of how we learned about the gas and dust between the stars.
Books about Galaxies and Quasars
Harrington, S., et al. Learning About Quasars.
Astrophysics II - Interstellar Matter and Galaxies, R. Bowers and T. Deeming, Jones and Bartlett 1984 ...
Investigations of interstellar matter
Observations of the galactic centre
Study of other galaxies and related phenomena
Cosmology ...
star formation (NASA Thesaurus) The collapse under gravity of molecular clouds of interstellar matter to form clusters of protostars, and the continuing collapse of the protostars to form main-sequence stars.
This interstellar matter intercepts the visible light emitted by distant stars so that observers on earth cannot view in detail distant parts of the Milky Way. A new branch of astronomy was initiated when the American electronic engineer Karl G.
Interstellar matter is compressed by the Galaxy's winding spiral arms. The clouds can be further compressed through collisions or by blast waves from exploding high-mass stars ( supernovae).
The cosmic rays that arise in extrasolar astrophysical sources are primary cosmic rays; these primary cosmic rays can interact with interstellar matter to create secondary cosmic rays.
In astronomy, the interstellar medium (or ISM) is the matter (interstellar matter, also abbreviated by ISM) and energy (interstellar radiation field, ISRF) content that exists between the stars within a galaxy.
" The heliopause distance is theorized as fluctuating in response to changes in interstellar matter and solar wind conditions. The breadth of the heliopause remains undefined but may be tens of astronomical units.
However, if a black hole passes through a cloud of interstellar matter, or is close to another "normal" star, the black hole can accrete matter into itself.
They resemble spirals but have no spiral arms, possibly because their interstellar matter is stripped away as they move through intracluster gas. A second type of unusual star system is the cD galaxy.
A relatively dense, cold region of interstellar matter where hydrogen gas is primarily in molecular form. Stars generally form in molecular clouds. Molecular clouds appear as dark blotches in the sky because they block all the light behind them.
The term "irregular galaxy" refers to the fact that no apparent shape can be seen, and that a great amount of interstellar matter is visible. The cloud contains a large number of variable stars; well over a thousand have now been catalogued.
reddening Dimming of starlight by interstellar matter, which tends to scatter higher-frequency (blue) components of the radiation more efficiently than the lower-frequency (red) components.
A galaxy with a "bar" of stars and interstellar matter, such as dust and gas, slicing across its center. The Milky Way is thought to be a barred spiral galaxy.
Black Hole ...
a central, flat disk containing a dense cloud of interstellar matter and young star clusters (mostly on the arms) a central bulge (or nucleus) containing older stars ...
Johnson, H. L. In Stars and Stellar Systems, Vol. 7. Nebulae and Interstellar Matter (Ed. B. M. Middlehurst and L. H. Aller). Chicago: University of Chicago Press, p. 167, 1968.
The phenomenon by which the extinction of blue light by interstellar matter is greater than the extinction of red light so that the redder part of the continuous spectrum is enhanced.
red giant - (n.) ...
The astronomers believe that the variations were caused by density variations in the interstellar matter, and that the matter was close to the source, which means the GRB was probably caused by a hypernova.
SAMPEX, the Solar Anomalous and Magnetospheric Particle Explorer, launched by a Scout rocket in 1992. It is investigating the composition of local interstellar matter and solar material and the transport of magnetospheric charged particles into the ...
Galaxy. A system made up of stars, nebulae and interstellar matter. Many galaxies, but not all, are spiral in form.
Their appearance shows little structure and they typically have relatively little interstellar matter. Consequently these galaxies also have a low portion of open clusters and a reduced rate of new star formation.
It is somewhat difficult to study because, located near the Milky Way plane, it is obscured by interstellar matter. With an exceptionally high rate of star formation, however, IC 10 is known as the only starburst galaxy in the Local Group.
Otto Struve
1897-1963
Russian-born American
made detailed spectroscopic studies of close binary stars; discovered interstellar matter (H II regions) ...
They contain an inconsiderable amount of interstellar matter, no young stars (consisting of old, Population II stars), and no open star clusters.
elliptical galaxy
A type of galaxy which is oval in shape but has no apparent structure which contains old stars with little interstellar matter.
For the new study Lopez and colleagues focused on relatively young supernova remnants that exhibit strong X-ray emission from silicon so as to rule out the effects of interstellar matter surrounding the explosion.
The disk and the bulge are surrounded by the galactic halo, which is spherical and even larger than the galactic disk. The halo consists of old stars, some in the globular clusters, and interstellar matter.
As the interstellar material moves into the region of high density, it is compressed which in turn triggers star formation. These newly formed stars continue to orbit around the centre of the galaxy just like the interstellar matter from which they ...
studied Oxygen and Carbon spectral lines at 63 and 158 microns, and a Far infrared Photometer which studied the sky at four bands centered at 150, 250, 400, and 700 microns. This data should add to our knowledge of cosmology, interstellar matter, ...
 See also: Light, Galaxy, Star, Galaxies, Mass
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