Friday, November 30, 2007

APOD 2.5

Pleiades, or the Seven Sisters, is a star cluster well known from its incredible blue reflection nebulae, located a mere 400 light-years away. The picture, spanning over 20 light-years, shows the famous star cluster on the right, but also shows lesser known dusty reflection nebulae nearby. However, these sister stars are not related, but rather are just passing through the same region of space. Using infrared detectors, a dusty disk belonging to a young Pleiades star, HD 23514, has recently been found, which is comparable in size to the terrestrial planet zone in our own solar system and could likely represent the debris from the process of rocky planet formation. I have looked up in the sky many a time and have seen Pleiades, but it is really amazing to see it in this view. Pleiades is a relatively large "object" and is easy to find, but when you look at it with your naked eye, it looks nothing like this. It's pretty interesting to see Pleiades like this after looking at so many times with my naked eye.

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