I have seen ice stars many times and they have an 'other worldly' appearance almost like eyes into the depth of the lakes. Recently, I decided to research how they are formed. I discovered they are examples of fantastic flow patterns created by water flowing from under the ice onto the snow surface covering an ice sheet often in slushy warmer conditions. The arms of the stars are infiltration conduits that carry upflowing water and drain away from the star. Typically the star refreezes again at cooler temperatures which is what I often see in early morning.