Seyfert galaxy. Optical image of the Seyfert galaxy NGC 4945 (upper centre),an edge-on spiral galaxy in the constellation Centaurus. Seyfert galaxies have an unusually bright nucleus. The nucleus of this galaxy is a Seyfert type 2 nucleus,which does not appear unusually bright at visible wavelengths,but is a powerful emitter of infrared radiation. The power source for a Seyfert nucleus is thought to be a large black hole. The stars Xi 1 Centauri (upper right) and Xi 2 Centauri (lower left) are also seen | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Celestial Image Co. |
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