Photographing Stary Night Skies...

Hi,

Recently I read an article of photographing star studded night skies. The article mentioned that one needs to have long exposures to capture a good star filled sky. Inspired by the article I want to take some star studded night sky photos.

However, I do not have a DSLR, but have a high end point and shoot camera (Canon Powershot SX20IS) that allows manual controls. The maximum exposure possible with this camera is 15 secs.

Is a 15 sec exposure good enough for star photography?

Thanks in advance...

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--Rinjo