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PG 0052+251 (Quasar)


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PG 0052+251
Quasar (クエーサー)

別名 (Other names)
QSO B0052+2509

距離 (Distance)
14億光年 (1.4 billion light-years)

PG 0052+251 is a quasar located 1.4 billion light years from the Earth.

PG 0052+251 (Quasar) : Picture

Quasar PG 0052+251
Quasar PG 0052+251
(C) NASA/ESA/John Bahcall (Institute for Advanced Study, Princeton) Mike Disney (University of Wales)
This image shows quasar PG 0052+251, which is 1.4 thousand million light-years from Earth, at the core of a normal spiral galaxy. Astronomers are surprised to find host galaxies, such as this one, that appear undisturbed by the strong quasar radiation.Quasars reside in a variety of galaxies, from normal to highly disturbed. When seen through ground-based telescopes, these compact, enigmatic light sources resemble stars, yet they are thousand of millions of light-years away and several hundred thousand million times brighter than normal stars. Astronomers believe that a quasar turns on when a massive black hole at the nucleus of a galaxy feeds on gas and stars. As the matter falls into the black hole, intense radiation is emitted. Eventually, the black hole will stop emitting radiation once it consumes all nearby matter. Then it needs debris from a collision of galaxies or another process to provide more fuel.

This image shows quasar PG 0052+251, which is 1.4 billion light-years from Earth, at the core of a normal spiral galaxy. Astronomers are surprised to find host galaxies, such as this one, that appear undisturbed by the strong quasar radiation.

Quasars and Their Host Galaxies
Quasars and Their Host Galaxies
(C) NASA/ESA/John Bahcall (Institute for Advanced Study, Princeton) Mike Disney (University of Wales)
Quasars reside in a variety of galaxies, from normal to highly disturbed. When seen through ground-based telescopes, these compact, enigmatic light sources resemble stars, yet they are billions of light-years away and several hundred billion times brighter than normal stars.

PG 0052+251
Quasar PG 0052+251
(C) NASA/ESA
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