digital camera recommendation

I've been using a Nikon coolpix 995 for planetary astrophotography which I have been happy with. The camera has developed a fatal system error and is not worth repairing. Any recommendations on a new, 5+ megapixel replacement, non DSLR? I'm looking for white balance control, noise reduction, long 1+ minute exposures, remote control, optical zoom 4+ times. I also want to use it as family camera! Very important, $500 or less. Anyone have any recommendations on camera?

Mark, have you tried a webcam for planetary imaging? Far and away the best images have come from the philips toucam. I know that doesn't exactly answer your question but I did note you mentioned planetary astrophotography.

Ed
UK