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.

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.

Quasars are not radio stars.

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

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.

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

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, Redshifts and Controversies is a 1987 book by Halton Arp, an astronomer famous for his Atlas of Peculiar Galaxies ( 1966 ).

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 ".

* 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 );

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

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

Quasars were originally ' quasi-stellar ' in optical images, and so had optical luminosities that were greater than that of their host galaxy.

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

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.

There have been contradictory reports from 1958 Delta 2, and the data quoted here are believed to be the more reliable.

As you approach the church on the Via D. Baullari you are passing within yards of the remains of the Roman Theatre of Pompey, near which is believed to have been the place where Julius Caesar was assassinated.

Mr. Hawksley said he believed there are a number of qualified city residents who would be willing to take the full-time CD job.

We today are not entitled to excoriate honest men who believed Parker to be downright pernicious and who barred their pulpits against his demand to poison the minds of their congregations.

The charges of the electron and proton are believed to be exactly equal and opposite, but Dr. Lyttleton is not so sure.

A number of causes are believed to be involved, including habitat destruction and modification, over-exploitation, pollution, introduced species, climate change, endocrine-disrupting pollutants, destruction of the ozone layer ( ultraviolet radiation has shown to be especially damaging to the skin, eyes, and eggs of amphibians ), and diseases like chytridiomycosis.

Also, a statistician may specify that logarithmic transforms be applied to the responses, which are believed to follow a multiplicative model.

At the start of a new industrial age in the 18th century, it was believed that " people are the riches of the nation ", and there was a general faith in an economy that paid its workers low wages because high wages meant workers would work less.

Most alphabetic scripts of India and Eastern Asia are descended from the Brahmi script, which is often believed to be a descendant of Aramaic.

The organosulphur compounds responsible for the characteristic odour are believed to have antioxidant, antibiotic and anticarcinogenic properties, to stimulate the immune system and to be protective of liver functioning.

After 1180 BC, the Hittite empire disintegrated into several independent " Neo-Hittite " states, subsequent to losing much territory to the Middle Assyrian Empire and being finally overrun by the Phrygians, another Indo-European people who are believed to have migrated from The Balkans.

Early human settlements are believed to have been established on Achill around 3000 BC.

Schweitzer notes that St. Paul apparently believed in the immediacy of the " Second Coming of Jesus ": " Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord " ( 1 Thessalonians 4. 17 ).

According to RFE / RL, comparable sums are believed to be transferred through non-bank systems, implying that cash remittances make up approximately 30 percent of Armenia's GDP in the first half of 2008.

" The story is apocryphal and they are believed to have scored at least one two among the singles.

They are believed to have enjoyed a happy marriage.

As of 2012, less than 50 Apple I computers ( with only six in working order ) are believed to exist, making it a very rare collector's item.

In Shinto, spirits of nature, or kami, are believed to exist everywhere, from the major ( such as the goddess of the sun ), which can be considered polytheistic, to the minor, which are more likely to be seen as a form of animism.

Their most widely known ethnonym is derived from the word ainu, which means " human " ( particularly as opposed to kamui, divine beings ), basically neither ethnicity nor the name of a race, in the Hokkaidō dialects of the Ainu language ; Emishi ( Ebisu ) and Ezo ( Yezo ) ( both ) are Japanese terms, which are believed to derive from another word for " human ", which otherwise survived in Sakhalin Ainu as enciw or enju.

It is believed that there are no remaining living descendants of the Kamchatka Ainu.

Amaranth greens are believed to help enhance eyesight.

There are for example fragments in ' Sapphic ' meter praising the Dioscuri, Hermes and the river Hebrus ( a river significant in Lesbian mythology since it was down its waters that the head of Orpheus was believed to have floated singing, eventually crossing the sea to Lesbos and ending up in a temple of Apollo, as a symbol of Lesbian supremacy in song ).

It may also have been to secure the release of the king from a vow to go on pilgrimage, if sources from after the Norman Conquest of England are to be believed.