🌌 Cosmology

Hubble's Law — Expanding UniverseVary the Hubble constant and watch galaxies recede faster with distance, mapping redshift to… Exoplanet Transit — Detecting Planets via Light CurvesSet planet radius, orbital period and inclination, then read the transit dip in a star's… Big Bang Nucleosynthesis — First 20 MinutesFollow the first 20 minutes after the Big Bang: track the neutron-to-proton ratio and see… CMB — Cosmic Microwave Background Power SpectrumTurn the dials on baryon density, dark matter and the Hubble constant and watch the acoustic… Primordial Nucleosynthesis — Big Bang First 3 MinutesSet the baryon density and watch the first three minutes forge hydrogen, helium and lithium,… Gravitational RedshiftWatch a photon lose frequency escaping a gravitational well — compare two clocks and see… Schwarzschild GeodesicsLaunch particles or photons around a black hole and watch orbital precession, plunging… Dark Matter — Galaxy Rotation CurvesCompare the predicted Keplerian drop-off against observed flat galaxy rotation curves and… Galaxy Rotation Curves — Dark Matter EvidenceCompare the falling Newtonian prediction against observed flat galaxy rotation curves, built… Dark Matter HaloNewSet halo mass and concentration to shape the density profile and see how much dark matter… Cosmic WebNewLet gravity pull thousands of galaxies into filaments, sheets and clusters, leaving the vast… Galactic Rotation CurveAdd or remove the dark matter halo and see why stars in a galaxy's outskirts orbit far… CMB Sky Map Simulation — Cosmic Microwave Background Temperature FluctuationsNewInteractive Cosmic Microwave Background (CMB) sky map simulation. Generate a procedural… Cosmology SimulationNewThis simulation provides a visual representation of cosmological models, including the Big… Astrophysics: Binary Black Hole Merger SimulatorNewWatch two black holes spiral together, rippling a spacetime grid with a rising-frequency… Astrophysics: Stellar Evolution & HR DiagramNewComplete guide to astrophysics: watch a star of chosen mass move across a 3D… Black Holes: Singularity, Event Horizon & Hawking RadiationNewComprehensive guide to black hole physics: formation mechanisms, Schwarzschild and Kerr… Cosmology: An Introduction to the Universe's OriginsNewDiscover the basics of cosmology - from the Big Bang to dark energy. Explore our… Cosmology: The Origin, Structure, and Fate of the UniverseNewModern cosmology: the Big Bang, cosmic inflation, dark matter, dark energy, the CMB, and… Dark Energy: The Universe's Mysterious AcceleratorNewA concise explanation of dark energy - the unknown force behind the accelerating expansion… Cosmic Microwave Background Sky MapNewA spherical all-sky temperature map shows the tiny fluctuations left over from the early… Cosmic Ray Air Shower SimulatorNewA high-energy primary cosmic ray enters the atmosphere and cascades into a spray of… Galactic Energy BudgetNewToggle kinetic velocity vectors, glowing thermal gas clouds and a gravitational potential… Galaxy Formation: N-Body CollapseNewWatch a cube of dark-matter and gas particles evolve from a near-uniform field with tiny… 3D Big Bang ExpansionNewThis simulation visually represents the expansion of the universe from the Big Bang,… Dark Matter Web — Three.js SimulationNewThis simulation provides an interactive visualization of the hypothesized 'dark matter web,'… Galaxy Collision 5NewWitness a spectacular galactic collision in this simulation, observing how immense… Cosmic Web — Large-Scale StructureNewThis simulation visualizes the cosmic web – the large-scale structure of the universe –… Transcendent Universe Transcendence SimulationNewThis simulation explores the potential for a universe beyond our observable one, considering… Ultimate Energy Dark Energy SimulationNewThis simulation examines the nature of dark energy and its role in accelerating the… Infinite Universe Expansion SimulationNewThis simulation allows you to explore the observable universe’s expansion by manipulating…