A nebula is an interstellar cloud of dust, hydrogen, helium and other ionized gases. When I thought of galaxy nails, idea of nebula nails seemed different and creative. First I polished my nails with black nail polish and with the help of make up sponge applied Dark blue, light blue and pinkish purple shade polish to give the cloudy effect. Finally a silver glitter polish is applied and the design is sealed with top coat. It is pretty and simple goes with Blue, black and any other dark color out fits.
Image of Nebula taken from Google