Cygnus A (3C 405) is a radio galaxy, one of the strongest radio sources in the sky. A concentrated radio source in Cygnus was discovered by Grote Reber in 1939. In 1946 Stanley Hey and his colleague James Phillips identified that the source scintillated rapidly, and must therefore be a compact object. [ 4 ]

Cygnus A, most powerful cosmic source of radio waves known, lying in the northern constellation Cygnus about 500,000,000 light-years (4.8 × 1021 km) from Earth. It has the appearance of a double galaxy. For a time it was thought to be two galaxies in collision, but …

Cygnus A was the first hyper-active galaxy discovered, and it remains by far the closest of the ultra-luminous radio galaxies. As such, Cygnus A has played a fundamental role in the study of virtually all aspects of extreme activity in galaxies.

Cygnus A is a Seyfert 2 Galaxy located in the constellation of Cygnus in the northern hemisphere. Cygnus A is not a Messier Object and doesn't have a Messier Number. The galaxy is separate and distinct, not in Milky Way galaxy or The Solar System.

它最大的特征是有两个巨大的发出射电辐射的瓣状结构，并且可以明显看到 射电瓣 通过狭长的喷流与中心暗弱的 椭圆星系 相连。 整个星系从一个瓣到另一个瓣延展超过50万光年。 天鹅座A它是在20世纪50年代射电望远镜刚刚投入使用时发现的。 它最大的特征是有两个巨大的发出射电辐射的瓣状结构，并且可以明显看到射电瓣通过狭长的喷流与中心暗弱的椭圆星系相连。 整个星系从一个瓣到另一个瓣延展超过50万光年。

2019年1月8日 · Cygnus A is a large galaxy that sits in the middle of a cluster of galaxies about 760 million light years from Earth. A supermassive black hole at the center of Cygnus A is rapidly growing as it pulls material swirling around it into its gravitational grasp.

2019年4月2日 · The scientists studied Cygnus A, a galaxy some 760 million light-years from Earth. The galaxy harbors a black hole at its core that is 2.5 billion times more massive than the Sun. As the black hole’s powerful gravitational pull draws in surrounding material, it also propels superfast jets of material traveling outward at nearly the speed of ...

Cygnus A is an excellent example of the Fanaroff-Riley (FR) type II radio sources, characterized by faint, very narrow jets, distinct lobes, and clear hot spots at the outer edges of the lobes, often where the jets intersect the outer edges.

Cygnus A is a large galaxy that sits in the middle of a cluster of galaxies about 760 million light years from Earth. A supermassive black hole at the center of Cygnus A is rapidly growing as it pulls material swirling around it into its gravitational grasp.

The radio source Cygnus A is produced in a galaxy some 600 million light-years away. The radio waves are coming from electrons propelled at nearly the speed of light through a long, thin "jet" at the core of the galaxy and deposited in giant "radio lobes."