Tikz: How to encapsulate shade in node?

I have this shaded circle:

\shade [ball color=black!80!whi开发者_Python百科te] (0,0) circle (1);

Is it possible to encapsulate it with node style?

(Including fixing circle radius?)

\node[shade,shading=ball,circle,ball color=black!80!white,minimum size=1cm] {};