two planets in a vast, star-filled galaxy, with a glowing nebula in the background

two planet vast star galaxy glow nebula background space plane milky cosmo asteroid universe cosmic orbit microwave parallax galactic solar matter comet cosmology oddity body ring exoplanet cosmonaut exploration supernova planetarium meteor collision remnant spacecraft unit conjunction interstellar magnitude constellation cosmogony astronaut gravity redshift astronomy expansion stellar starlight ray planets starfilled glowing generative