planets realistic transparent set with solar system planets

academy astronaut astronautics aviation badge banner camp classic collection concept decorative design earth education element elements emblem exploration explore explorer flight galaxy graphic gravitation gravity helmet icons illustration insignia jupiter label launch life logo mars mercury milky monochrome moon neptune nostalgia object orbits ornament outer patch planet planets pluto rays realistic retro rocket round saturn school science set ship shuttle signs solar space star studies sun symbol system technology telescope transparent travel universe uranus vector venus vintage way weightlessness