PREPARATION:

1. Pour each flavor of gelatin into separate medium bowl. Add 1 cup boiling water to each. Stir 2 minutes to dissolve completely. Add 1 cup cold water to each bowl. Refrigerate 20 to 25 minutes until slightly thickened.
2. Scoop out round planets from cantaloupe and watermelon using both ends of melon ball tool. Cut apples into 1/3-inch thick slices. Use small star cookie cutter or small knife to cut into stars.
3. Spray 2-quart glass bowl with nonstick cooking spray and wipe out lightly with paper towel. Pour thickened yellow gelatin on bottom. Arrange 4 to 5 pieces of fruit on top of gelatin near sides; chill 5 minutes. Carefully pour orange gelatin over yellow gelatin and fruit. Place additional fruit on top of second layer and chill 5 minutes. Repeat with red gelatin and remaining fruit. Finish with blue gelatin; cover and chill in refrigerator 4 hours or more. Unmold onto platter or serve directly from bowl.