| Re: Big or little Dipper
Good point & very interesting. I didn't know about that.
How long must the exposure be before the rotation of the earth causes the stars to begin leaving a trail (assuming equipment to prevent this was not being used). All the stars in the original photo seem to be still points of light with no tails?
Last edited by Rich_; 20-10-2009 at 08:38 PM.
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