Centaurus A (also known as NGC 5128 or Caldwell 77) is a galaxy in the constellation of Centaurus. It was discovered in 1826 by Scottish astronomer James Dunlop from his home in Parramatta, in New South Wales, Australia.

半人马座A又称为 NGC 5128，除了上述的尘埃带外，它和一般的椭圆星系比起来也含有较高比率的蓝色年轻恒星，而且是很强的电波辐射源。 证据显示半人马座A可能是两个正常星系互撞的产物。

2014年10月12日 · Centaurus A is a peculiar galaxy located in the southern constellation Centaurus. It is the fifth brightest galaxy in the night sky, the nearest giant galaxy to the Milky Way, and one of the nearest radio galaxies to Earth. Its exact type is uncertain, but it is usually classified either as a giant elliptical or lenticular galaxy.

2024年8月23日 · Caldwell 77, also cataloged as NGC 5128 and commonly called Centaurus A, is a peculiar elliptical galaxy. Centaurus A is apparently the result of a collision between two otherwise normal galaxies, which led to a fantastic jumble …

半人馬座A，也稱為 NGC 5128，是位於 半人馬座 內距離大約1千4百萬光年遠的一個 透鏡星系。 它是最靠近地球的電波源之一，也是被專業天文學家廣泛研究的 活躍星系核 [5]。

Centaurus A, also known as NGC 5128, is well known for its dramatic dusty lanes of dark material. Hubble’s new observations, using its most advanced instrument, the Wide Field Camera 3, are the most detailed ever made of this galaxy.

2020年2月22日 · Also known as NGC 5128, the peculiar elliptical galaxy is over 60,000 light-years across. A region spanning about 8,500 light-years, including the galaxy’s center (upper left), is framed in this sharp Hubble Space telescope close-up.

2023年5月3日 · Pictured is NGC 5128, better known as Centaurus A. Cen A is the fifth brightest galaxy on the sky and is located at a distance of about 12 million light years from Earth. The warped shape of Cen A is the result of a merger between an elliptical and a spiral galaxy.

At a distance of 3.4 Mpc, NGC 5128 (Centaurus A) is by far the nearest active radio galaxy. It is often considered to be the prototype Fanaroff-Riley Class I ‘low-luminosity’ radio galaxy, and as such it plays an important role in our understanding of a major class of active galaxies.

These two objects were both found in elliptical galaxies, NGC 5128 (also known as Centaurus A) shown here and NGC 4636. In this Chandra X-ray Observatory image of NGC 5128, low, medium, and high-energy X-rays are colored red, green, and blue, and the location of the flaring source is outlined in the box to the lower left.