NGC 7789 is an open cluster in Cassiopia and was discovered by Caroline Herschel in 1783. It is called the White Rose because the dark lanes make it look a bit like a rose seen from above. It is about 8,000 light years away within the Milky Way galaxy and is 1,600 million years old.
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It is not easy to see the rose-like structure in my image. (The mouseover shows a blurred version that might make it a little clearer.) There is a nice colour picture in APOD for 9 July 1999. Date and Time: 29th September 2011 21:31 to 21:36 UT Camera: MX716 Telescope: LX200 with 0.33 focal reducer and Astronomik CLS filter Capture: star_mx7. 10 frames, 30" exposure Processing: star_mx7. Background, non-linear stretch 25. Registax. Stacked 10 frames, Gaussian wavelets Scheme 2. |
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