The Inner Solar System & Gas Giants The Sun: Diameter: 1,391,000 km. You could fit 1.3 million Earths inside it. It contains 99.8% of all the mass in the entire solar system. Earth: 149,597,870 km from the Sun. Diameter: 12,742 km. The only known place in the universe harboring life. Jupiter: 778,169,925 km from the Sun. Diameter: 139,820 km. The Solar System's cosmic defender; its immense gravity acts as a shield deflecting comets. Saturn: 1,432,605,297 km from the Sun. Diameter: 116,464 km. It is so massive, yet so completely composed of lightweight gas, that the entire planet would float in water.
Deep Space & Interstellar Boundaries Kuiper Belt & Oort Cloud: Massive regions of primordial ice, rock, and dormant comets enveloping our solar system. Voyager 1: The farthest human-made object in existence (over 24 billion km away), carrying the Golden Record for extraterrestrial discovery. Proxima Centauri: 40,174,930,000,000 km from the Sun. The absolute closest star to our own. Traveling at 1,000 km/h, it would take over 4.5 million years to reach it.
Features for Sci-Fi Worldbuilding Procedural Planets & Moons: Generate everything from scorched lava worlds and toxic hothouses to massive, ringed gas giants and frozen terrestrial spheres. Deep Space Anomalies: Toggle your Deep Space Scanners to locate hidden Dyson spheres, derelict precursor probes, quantum wormholes, and rogue black holes. Dynamic Astrophysics Narratives: Every generated system comes with an auto-generated scientific report detailing its orbital mechanics, habitability, and resource potential.
Easter Eggs & Sci-Fi Presets The engine contains handcrafted logic for famous fictional universes and scientific concepts. Try generating these seeds: Famous Systems: Arrakis (Dune), Tatooine (Star Wars), Vulcan (Star Trek), Solaris, and Gallifrey. The Quantum Realm: Type any atomic number (e.g., "element 79" for Gold) to generate a true-to-scale visualization of an atom, complete with protons, neutrons, and electron probability clouds. Cosmic Minigames: Generate the seed "waldo" to play a massive game of hide-and-seek across a procedurally generated solar system.