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A quasar (/ˈkweɪzɑːr/) (also quasi-stellar object or QSO) is an active galactic nucleus of very ... Quasars are found over a very broad range of distances ( corresponding to redshifts .... quasars appeared as point sources, indistinguishable from stars, except for their ..... Relativity, Gravitation and Cosmology (Illustrated ed.).


Pulsars are rotating neutron stars, dense stellar cores left after a star implodes and ..... Like 3C48, 3C273 appeared starlike, but with a wispy jet off to one side. ... Evidence for the so-called cosmological distances of quasars came trickling in. ... that the quasars were surrounded by a galaxy of stars too faint to be resolved.


Feb 27, 2003 ... Quasars were first discovered as mysterious ``quasistellar'' radio sources. ... a number of radio sources that were called ``quasistellar'', because (like stars) they ... in the spectra of quasars corresponded to the emission lines of ordinary atomic ... It is at a distance of roughly 4000 Mpc, or 13 billion light-years.


The distances between galaxies are large and are often measured in megaparsecs. ... dust and gas left between the stars; (c) this means that they have no new star .... Perhaps if the dwarf galaxies were brighter, Hubble would have arranged the .... At first glance it looks like the Milky Way is at the center of the universe and it ...


The discovery of radio sources that appeared point-like, just like stars, came with ... of two of those faint “blue stars” that were strong sources of radio waves (Figure 1). ... Note that nothing in this image distinguishes the quasar from an ordinary star. ... Despite this great distance, it is still one of the quasars closest to the Milky  ...


OBSERVED CHARACTERISTICS OF QUASARS Appearance Harlan J. Smith ... Ordinary stars have a continuous energy distribution in their spectra to a first order ..... If cosmological distances for quasars offered no difficulties either, this paper could ... galaxies, if present, might simply be too faint to have been seen as yet.


So little is yet properly explained that we theoretical astrophysicists should feel deeply ... even if they were so far away that the integrated light from io11 stars failed to ... which looked like ordinary stars on photographic plates, but whose spectra ... across, corresponding to only io~~ arc seconds at a cosmological distance.


Jun 12, 2013 ... Astronomical Distance Determination Methods and the Light Travel Time Problem ... The nearest star is a little more than four light years distant, yet Adam ... Nevertheless, the ancient values were accepted until a few centuries ago. ... a superior planet is at quadrature, meaning that the planet makes a right ...


Jan 24, 2015 ... Abstract. Evidence for the Big Bang was recognized by radio astronomers puzzled by the pervasive presence of a weak radio signal that ...