Nikon Binoculars For Astronomy And Nature Watch?

I have been looking at Nikon binoculars but there are too many info where to buy prescription drugs without prescription to make a decision.
Should I get a 10x50 or 12x50 or 16x50 ? I´d say 16x is better because gives a better magnification but I am worried if it will be too shaky.
Do 16x become too shake for star gazing and nature watch?

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