celestial marvels in 3d: captivating space backdrop with vivid planets, stars, and nebulae, portraying the cosmic

3d backgrounds space background planets stars nebulae vibrant colors vastness mystery celestial cosmic grandeur enigma wonderscape stunning scene immense beauty intrigue dreamscape galactic infinite expanse allure universe astral symphony immersive majesty profound galaxy star nebula planet astronomy science fantasy exploration sky futuristic outer meteor illustration radiant colorful design tech concept deep blue technology digital artistic constellation polaris astro bright planetarium gas cloud graphic view night milky way rainbow ai generated