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> Spiral Galaxy NGC 6814
Spiral Galaxy NGC 6814
author: Nasa/ESA/Novapix
reference: a-gax68-14001
Image Size 300 DPI: 33 * 33 cm
Spiral galaxy NGC 6814 seen by Hubble Space Telescope. NGC 6814 has an extremely bright nucleus, a telltale sign that the galaxy is a Seyfert galaxy. These galaxies have very active centres that can emit strong bursts of radiation. The luminous heart of NGC 6814 is a highly variable source of X-ray radiation, causing scientists to suspect that it hosts a supermassive black hole with a mass about 18 million times that of the Sun. As NGC 6814 is a very active galaxy, many regions of ionised gas are studded along  its spiral arms. In these large clouds of gas, a burst of star formation has recently taken place, forging the brilliant blue stars that are visible scattered throughout the galaxy.
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