Create a heartwarming illustration that portrays the celebration of a Caucasian father's 70th birthday in a Scenic Lake District environment. The scene should have a serene lakeside picnic with a cosmic influence and be doused with pastel hues. Include a banner stretching between two pine trees with the words 'Happy 70th, Dad!'. Additionally, the lake in the background should reflect the dazzling galaxy with the gentle shimmer of stars and planets on the water surface. In the forefront, there should be a birthday cake embellished with an edible constellation design that sits at the heart of a checkered picnic blanket, which is accompanied by various lovingly wrapped gifts.

Generated with these themes: Dad birthday lake district and universe 70th celebration.

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