With those requirements you are greatly limiting yourself. I suggest that you go to https://www.dpreview.com to look at the cameras that are currently available. [For night photography, I’d look to Digital SLRs. You’ll be pretty limited with a point-and-click, even a good one.]
As for night photography, you should be looking for the widest aperture that you can find. The aperture is the little f/5.6 number used when discussing lens capabilities. The LOWER the number the wider the lens opens. You need the wide aperture (hole) so that you can get a lot of light into the camera in a short period of time — otherwise you risk movement blur.
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