Quasars are extremely luminous and were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that were point-like, similar to stars, rather than extended sources similar to galaxies.

Quasars also show ' forbidden ' spectral emission lines which were previously only seen in hot gaseous nebulae of low density, which would be too diffuse to both generate the observed power and fit within a deep gravitational well.

Quasars ( short for " quasi-stellar radio source ") were one of the first point-like radio sources to be discovered.

* Quasars have been photographed since the late 19th centuries although they were not known to be unusual objects until the 1960s.

* Quasars ( objects the size of the solar system and as luminous as a hundred modern galaxies, so distant that they date from the early years of the universe );

* Quasars ( objects the size of the solar system and as luminous as a hundred modern galaxies, so distant that they date from the early years of the universe );

Quasars show a very high redshift, which is an effect of the expansion of the universe between the quasar and the Earth.

Quasars are believed to be powered by accretion of material into supermassive black holes in the nuclei of distant galaxies, making these luminous versions of the general class of objects known as active galaxies.

Quasars may also be ignited or re-ignited from normal galaxies when infused with a fresh source of matter.

Celestial objects like Quasars, super dense objects that lie far from Earth, emit electromagnetic waves in its full spectrum including radio waves.

Due to the high frequency used, the chances finding gravitational lenses increases as the relative number of compact core objects ( e. g. Quasars ) are higher ( Sadler et al.

* Arp, Halton C., Quasars, Redshifts and Controversies.

Quasars are not radio stars.

Quasars release an extraordinary amount of energy, meaning they are among the brightest objects in the universe.

Quasars also happen to have relatively uniform spectral features, regardless of position in sky or distance from Earth.

Quasars below a certain redshift will not show the Gunn-Peterson trough ( though they may show the Lyman-alpha forest ), while quasars emitting light prior to reionization will feature a Gunn-Peterson trough.

Quasars are a good candidate source because they are highly efficient at converting mass to energy, and emit a great deal of light above the threshold for ionizing hydrogen.

( Quasars are also associated with an accreting compact object, but are thought to be merely a particular variety of AGN.

Quasars ' extreme red shift led us to conclude that they are distant active galactic nuclei.

Bell and D. McDiarmid, reported: " Six Peaks Visible in the Redshift Distribution of 46, 400 SDSS Quasars Agree with the Preferred Redshifts Predicted by the Decreasing Intrinsic Redshift Model ".

Of one thing we can be sure: they were not sketched out by the revolutionary theorists of the eighteenth century who formulated the political principles and originally shaped the political institutions of what we term the `` free society ''.

Most of them were written between 1953 and 1960 and originally appeared in various magazines.

Such songs were originally addressed to Apollo, and afterwards to other gods: to Dionysus, to Apollo Helios, to Apollo's son Asclepius the healer.

The " elf-shot " originally indicated disease or death attributed to the elves, but it was later attested denoting arrow-heads which were used by witches to harm people, and also for healing rituals.

Furthermore, U. S. appellate courts are usually restricted to hearing appeals based on matters that were originally brought up before the trial court.

Today, abaci are often constructed as a bamboo frame with beads sliding on wires, but originally they were beans or stones moved in grooves in sand or on tablets of wood, stone, or metal.

In Cyrillic originally the letters were given names based on Slavic words ; this was later abandoned as well in favor of a system similar to that used in Latin.

Some amateur astronomers use home-made radio telescopes, while others use radio telescopes that were originally built for astronomy research but have since been made available for use by amateurs.

The provinces of Turkey are organized into 7 census-defined regions (), which were originally defined at the First Geography Congress in 1941.

His later novels included fixups such as The Beast ( aka Moonbeast ) ( 1963 ), Rogue Ship ( 1965 ), Quest for the Future ( 1970 ) and Supermind ( 1977 ); expanded short stories ( The Darkness on Diamondia ( 1972 ), Future Glitter ( aka Tyranopolis ) ( 1973 ); original novels such as Children of Tomorrow ( 1970 ), The Battle of Forever ( 1971 ) and The Anarchistic Colossus ( 1977 ); plus sequels to his classic works, many of which were promised, but only one of which appeared, Null-A Three ( 1984 ; originally published in French ).

Sources: Parts of an earlier version of this article were originally taken from Federal Standard 1037C in support of MIL-STD-188.

Since some of the Roman months were named in honor of divinities, and as April was sacred to the goddess Venus, the Festum Veneris et Fortunae Virilis being held on the first day, it has been suggested that Aprilis was originally her month Aphrilis, from her equivalent Greek goddess name Aphrodite ( Aphros ), or from the Etruscan name Apru.

Chacoan and other structures constructed originally along astronomical alignments, and thought to have served important ceremonial purposes to the culture, were systematically dismantled.

Abbots were originally subject to episcopal jurisdiction, and continued generally so, in fact, in the West till the 11th century.

They were originally buried where they died, but were later moved on the orders of the US military government to the cemeteries of their previous homes.

The two terms may not have originally been distinguished ; though in Homer's poems nectar is usually the drink and ambrosia the food of the gods ; it was with ambrosia Hera " cleansed all defilement from her lovely flesh ", and with ambrosia Athena prepared Penelope in her sleep, so that when she appeared for the final time before her suitors, the effects of years had been stripped away and they were inflamed with passion at the sight of her.

Most agates occur as nodules in volcanic rocks or ancient lavas where they represent cavities originally produced by the disengagement of volatiles in the molten mass which were then filled, wholly or partially, by siliceous matter deposited in regular layers upon the walls.

The Great Andamanese were originally 10 distinct tribes with 5, 000 people in total ; most of the tribes are extinct, and the survivors, now just 52, speak mostly Hindi.

Hellen, Graikos, Magnis, and Macedon were sons of Deucalion and Pyrrha, the only people who survived the Great Flood ; the ethne were said to have originally been named after the elder son Graikoi but renamed later after Hellen who was proved to be the strongest.

Xanthippus, the Athenian commander at Mycale, had furiously rejected this ; the Ionian cities were originally Athenian colonies, and the Athenians, if no-one else, would protect the Ionians.

Per a News article on Page # 9 of the October 1984 issue of Acorn User, the Plus 3 was originally destined to have used the Intel 8272 disk controller, ( and not 8271, which were in short supply at the time ).

Whereas Wozniak originally referred to his Integer BASIC as " Game BASIC ," having written it so he could write a Breakout clone for his new computer, few action games were written in Applesoft BASIC for several reasons:

As many of the New Englanders were originally from England game hunting was often a pastime from back home that paid off when they immigrated to the New World.