Image: Hubble spies a spiral snowflake

Image: Hubble spies a spiral snowflake
Credit: ESA/Hubble & NASA; Acknowledgement: Judy Schmidt

Together with irregular galaxies, spiral galaxies make up approximately 60 percent of the galaxies in the local universe. However, despite their prevalence, each spiral galaxy is unique—like snowflakes, no two are alike. This is demonstrated by the striking face-on spiral galaxy NGC 6814, whose luminous nucleus and spectacular sweeping arms, rippled with an intricate pattern of dark dust, are captured in this NASA/ESA Hubble Space Telescope image.

NGC 6814 has an extremely bright nucleus, a telltale sign that the galaxy is a Seyfert galaxy. These have very active centers 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 with a mass about 18 million times that of the sun.

As NGC 6814 is a very active galaxy, many regions of ionized gas are studded along its . 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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Hubble spies a spiral snowflake

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Citation: Image: Hubble spies a spiral snowflake (2016, May 16) retrieved 18 June 2019 from https://phys.org/news/2016-05-image-hubble-spies-spiral-snowflake.html
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