Astronomers have found a quasar that's more than five times more powerful than any previously seen. Astronomers have found a quasar that's more than five times more powerful than any previously seen. This image from Hubble's Wide Field and Planetary Camera 2 (WFPC2) is likely the best of ancient and brilliant quasar 3C , which resides Distance : 2 billion light years.
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These widths are due to Doppler shifts caused by the high speeds of the gas emitting the lines. Wenn Sie das Passwort 5 mal falsch eingeben, wird Ihr Kundenkonto für 24 Stunden blockiert. Black holes are objects so dense, and with so much mass, that even light cannot escape their gravity. More than , quasars are known, most from the Sloan Digital Sky Survey. Sie wollen Ihre Gewinne schnell erhalten? Several dozen nearby large galaxies, with no sign of a quasar nucleus, have been shown to contain a similar central black hole in their nuclei, so it is thought that all large galaxies have one, but only a small fraction are active with enough accretion to power radiation and so are seen as quasars. Because quasars are distant objects, any light which reaches the Earth is 888 casino live blackjack regeln
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Kundendienst Über uns AGB Bonus AGB Verantwortung Datenschutzrichtlinie Kontaktieren Sie uns. Quasars are part of a class of objects known as active galactic nuclei AGN. Hubble has found black holes 3 billion times as massive as our Sun at the centre of some galaxies. With infrared telescopes and the Hubble Space Telescope , the "host galaxies" surrounding the quasars have been detected in some cases. The positions of most are known to 0. A multiple-image quasar is a quasar whose light undergoes gravitational lensing , resulting in double, triple or quadruple images of the same quasar. As quasars are rare objects, the probability of three or more separate quasars being found near the same location is very low. Retrieved 13 July Spielen kann süchtig machen. This radiation is emitted across the electromagnetic spectrum, almost uniformly, from X-rays to the far-infrared with a peak in the ultraviolet-optical bands, with some quasars also being strong sources of radio emission and of gamma-rays. This spectrum revealed the same strange emission lines. It was suggested, for example, that the redshift of quasars was not due to the expansion of space but rather to light escaping a deep gravitational well. Enter your email address to subscribe to this blog and receive notifications of new posts by email. Chandra Images by Category: These widths are due to Doppler shifts caused by the high speeds of the gas emitting the lines. However, astronomers can study the effects of black holes on their surroundings. Because quasars are extremely distant, bright, and small in apparent size, they are useful reference points in establishing a measurement grid on the sky. The term "quasar" originated as a contraction of "quasi-stellar radio source", because quasars were first identified as sources of radio-wave emission, and in photographic images at visible wavelengths they resembled point-like stars.