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www.astro.ufl.edu/~lada/ast1002/homework7.html

What perception of the Milky Way Galaxy did astronomer have in the early part of this century? a) They believed ... In a lobe radio galaxy, the ultimate energy source for the entire radio source is thought to reside: a) In the lobes. ... Why is the energy source of Seyfert galaxies thought to be extremely compact? a) Their energy ...

www.flashcardmachine.com/astronomy126.html

Apr 6, 2017 ... The most elongated of the elliptical galaxies are Hubble's class: ... Why is the energy source of Seyfert galaxies thought to be extremely compact? .... In a lobe radio galaxy, the ultimate energy source for the entire galaxy is thought to reside:  ...

lifeng.lamost.org/courses/astrotoday/CHAISSON/AT325/HTML/AT325EOC.HTM

In a lobe radio galaxy, the energy comes from enormous radio lobes that dwarf ... This source—a black hole—must be scaled-up in a quasar to a consumption rate ... black hole responsible for energy production in the active galaxy M87 is thought to ... The fact that a typical quasar would consume an entire galaxy's worth of ...

archive.ncsa.illinois.edu/Cyberia/NumRel/RelUniverse2.html

Nov 8, 1995 ... Some reside in our own galaxy -- The Milky Way. ... The Ultimate Singularity ... It surrounds a neutron star whose radio emissions pulsate 30 times per second. ... part of their rotational energy gets converted into gravitational radiation. ... Here's an optical image of the powerful X-ray source Cygnus X-1.

www.cfa.harvard.edu/~ejchaisson/cosmic_evolution/docs/fr_1/fr_1_gal4.html

Observations during the 1990s imply that black holes reside in the hearts of ... How can an entire star (or larger) shrink to the size of an atom (or smaller), ... FIGURE 2.6 – Earth being squeezed by a gigantic vise—just a thought! ..... And in the center of the ring is an intense radio source—the dynamical nucleus of our Galaxy.

adsabs.harvard.edu/full/1983A%26A...119L...3S

In any case, it is expected that the radio galaxy phenomenon would be .... Three sources (3C293, M87 and Cyg A) showed extended structure. .... extended radio structures are not in the disk plane, causing one lobe to probe less disk gas. ... The peculiar nature of the absorption resides in the feature at 1645 km/s. l00 km/s  ...

www.astronomy.ohio-state.edu/~pogge/Ast162/Unit4/agns.html

Feb 16, 2006 ... Active Galactic Nuclei: Powerful energy sources in the nuclei of some galaxies. Types of Active Galaxies: Quasars: Seyfert Galaxies: Radio Galaxies. Power source: ... Sometimes brighter than the entire galaxy. Strong, broad ...

www.nasa.gov/multimedia/imagegallery/image_feature_1846.html

In a single exposure, astronomers were able to confirm the existence of a supermassive black hole in the center of galaxy M84. They did this by using the ...

www.encyclopedia.com/science/science-magazines/astronomy-and-space-science-pulsars-quasars-and-distant-questions

These new objects were dubbed pulsars, for “pulsating radio sources.” .... This is now thought to be the energy source of quasars. .... masses of material per year for a billion years would be the equivalent mass of an entire galaxy. ... to find evidence that supermassive black holes truly did reside in the centers of galaxies .