For the gelatin: In a large, deep bowl, combine the gelatins. Pour the boiling water over the mixture and sir until completely dissolved. Refrigerate for 1 1/2 hours or until partially set.

Meanwhile, prepare the cosmic fruit: Cut cantaloupe, watermelon, and honeydew into stars and moon shapes. Press the fruit into the partially set gelatin, then refrigerate for 4 hours or until set.

Place the bowl in a pan of hot water to loosen the gelatin from the sides, then invert onto a wizard-like platter.