From the atom to the observable universe. Explore 200+ real astronomical objects, simulate impossible physics, and witness the final moments of dying stars.
Navigate through our solar system, nearby stars, galaxies, and beyond. Every object contains real scientific data.
All 8 planets with real data, 50+ moons, asteroid belt, Kuiper belt, comets, and dwarf planets. Accurate orbital mechanics.
Proxima Centauri, Alpha Centauri, Sirius, TRAPPIST-1 and more. Includes known exoplanets and habitable zone candidates.
Milky Way, Andromeda, Centaurus A, M87, and galaxy clusters. Journey to the edge of the observable universe.
Black holes, pulsars, magnetars, quasars, nebulae, supernovae, kilonovae, and theoretical objects like white holes.
105 scenarios exploring what would happen if fundamental physical constants changed. Would we survive? Let's find out.
What if gravity was 10× stronger? Reversed? Only worked at short range? Explore the force that shapes the universe.
What if light moved 10× slower? If photons had mass? If we could see all wavelengths?
What if electrons were heavier? If protons decayed? If the whole universe had only one electron?
What if time ran backwards? If we had 5 seconds of precognition? If entropy decreased?
Trees would be shorter, animals smaller, but life would adapt...
Already possible! Slow light experiments reached 17 m/s...
Effects would precede causes. Consciousness couldn't form...
Philosophically unfalsifiable. Would it even matter?
Generate unique stories of dying stars. Each star speaks its final thoughts as it approaches the end of its cosmic journey.
The longest-lived stars. They'll still be burning when the universe grows cold. Trillions of years of quiet contemplation.
Like our Sun. 10 billion years of steady burning before expanding into a red giant and shedding its outer layers.
Massive, brilliant, and short-lived. They burn through their fuel in mere millions of years before going supernova.
The compressed remnant of a supernova. A teaspoon weighs billions of tons. Spinning, pulsing, slowly fading.
An endless, procedurally generated starfield. No objectives, no goals. Just you and infinity. Leave messages for future travelers.