🌌 Cosmology

Exoplanet Transit — Orbit & Light Curve (2D)New📱See how astronomers find distant planets with the transit method. Watch a top-down orbit… Hubble Diagram: Velocity vs. Distance Fit (2D)New📱A 2D companion to the 3D Hubble expansion simulator: the canonical Hubble diagram, plotting… Primordial Nucleosynthesis Abundance Curves (2D)New📱A 2D Canvas graph of Big Bang nucleosynthesis: watch hydrogen, helium-4, deuterium, and… Dark Matter Rotation Curve (2D)New📱A 2D companion to the dark-matter simulation: plot the Keplerian visible-matter-only… Gravitational Redshift 2D — Photon Wavelength Stretch (2D)New📱See a photon's wavelength stretch in real time as it climbs out of a massive body's gravity… Schwarzschild Geodesics — Orbit & Deflection (2D)New📱Launch photons and massive particles near a Schwarzschild black hole and watch numerically… Galaxy Rotation Curve — Dark Matter Evidence (2D)New📱Compare the Keplerian rotation curve predicted from visible stellar mass alone with the flat… Cosmic Web Structure Simulator (2D)New📱A 2D Canvas simulation showing galaxies migrate from a random scatter into filaments, nodes… Big Bang Nucleosynthesis — First 20 Minutes (2D)New📱The 2D companion to the 3D Big Bang Nucleosynthesis simulator: the same n/p freeze-out and… Nebula Gas Collector — 2D Magnetic ScoopNew📱2D top-down magnetic ramjet scoop through a nebula: tune flight speed, nebula density,… Galactic Rotation Curve (2D)New📱2D canvas companion: a top-down galaxy view coloured by orbital speed plus a live V(r) plot… CMB Acoustic Oscillator: Baryon-Photon Plasma Waveform (2D)New📱2D companion to the CMB power spectrum simulator: numerically animates the tight-coupling… Expanding Universe 2D: Scale Factor & Hubble's LawNew📱A flat top-down 2D companion to the 3D balloon-analogy Big Bang simulator: a grid of… Hypergraph Universe 2D — Emergent Spacetime DimensionNew📱2D discrete 'digital physics' model: a directed graph grows under a local x→y→z rewriting… Anthropic Landscape 2D: Cosmological Constant SelectionNew📱Sample thousands of vacua from a flat string-landscape prior on the cosmological constant in… Cosmic Recurrence 2D: Tegmark's Level I Multiverse LatticeNew📱Interactive 2D lattice of Hubble-volume regions, each drawing one of N possible particle… Dark Matter Halo Around a GalaxyNew📱A top-down 2D galaxy with a live rotation-curve plot — pan and zoom the disk, click a star,… Dark Matter Halo Around a GalaxyNew📱A 3D galaxy of orbiting stars whose rotation curve stays flat with an adjustable dark-matter… Dark Matter Free-Streaming: 2D Power-Spectrum LabNew📱A genuinely 2D Fourier-space simulation: pick a dark-matter particle mass and watch a real… Bubble NucleationNew📱Explore eternal inflation through a Poisson process of bubbles appearing on a comoving… Bubble NucleationNew📱Visualize bubble nucleation in a real 3D comoving volume, with collisions marked by oriented… Dark Matter Free-Streaming: Cold vs Warm vs HotNew📱Pick a dark-matter particle mass from an eV-scale neutrino to a hundred-GeV WIMP and watch… Anthropic Landscape: Cosmological Constant SelectionNew📱Sample thousands of vacua from a flat string-landscape prior on the cosmological constant… Cosmic Recurrence: Tegmark's Level I MultiverseNew📱An interactive 3D lattice of Hubble-volume-sized regions, each assigned one of a finite… Hypergraph Universe — Emergent SpacetimeNew📱A discrete 'digital physics' model where a hypergraph grows by a local rewriting rule, and… Hubble Tension — Two Ages of the UniverseNew📱Two flat-ΛCDM universes expand side by side from the exact Friedmann-equation solution — one… Nebula Gas Collector (Ultra)New📱Explore the vastness of a nebula and learn about gas collection in this immersive cosmology… Supernova Scavenger (Ultra)New📱Explore the remnants of a supernova explosion in this simulation. Manipulate gravitational… Dark Energy & Cosmic ExpansionNew📱Interactive 3D simulation integrating the flat Friedmann equation live: a field of galaxies… Genesis — Star BirthNew📱Models the birth and evolution of stars in a cosmic environment. Galaxy Merging ProcessNew📱Models the gravitational interactions and merging process of two colliding galaxies. Cosmic Microwave Background SimulatorNew📱Interactive CMB sky map: watch the whole-sky microwave afterglow of the Big Bang rendered as… Cosmic Expansion & Structure SimulatorNew📱Integrate the Friedmann equation in real time to watch the scale factor of the universe… Expanding Universe: Friedmann Equation SimulatorNew📱Solve the Friedmann equation live and watch a 3D field of galaxies expand from a fixed… Cosmic Microwave Background Sky MapNew📱A spherical all-sky temperature map shows the tiny fluctuations left over from the early… Cosmic Ray Air Shower SimulatorNew📱A high-energy primary cosmic ray enters the atmosphere and cascades into a spray of… Galactic Energy BudgetNew📱Toggle kinetic velocity vectors, glowing thermal gas clouds and a gravitational potential… Galaxy Formation: N-Body CollapseNew📱Watch a cube of dark-matter and gas particles evolve from a near-uniform field with tiny… Astrophysics: Binary Black Hole Merger SimulatorNew📱Watch two black holes spiral together, rippling a spacetime grid with a rising-frequency… Astrophysics: Stellar Evolution & HR DiagramNew📱Complete guide to astrophysics: watch a star of chosen mass move across a 3D… Black Holes: Singularity, Event Horizon & Hawking RadiationNew📱Comprehensive guide to black hole physics: formation mechanisms, Schwarzschild and Kerr… Cosmology: An Introduction to the Universe's OriginsNew📱Discover the basics of cosmology - from the Big Bang to dark energy. Explore our… Cosmology: The Origin, Structure, and Fate of the UniverseNew📱Modern cosmology: the Big Bang, cosmic inflation, dark matter, dark energy, the CMB, and… Dark Energy: The Universe's Mysterious AcceleratorNew📱A concise explanation of dark energy - the unknown force behind the accelerating expansion… Cosmology SimulationNew📱This simulation provides a visual representation of cosmological models, including the Big… 3D Big Bang ExpansionNew📱This simulation visually represents the expansion of the universe from the Big Bang,… Galaxy Collision 5New📱Witness a spectacular galactic collision in this simulation, observing how immense… Cosmic Web — Large-Scale StructureNew📱This simulation visualizes the cosmic web – the large-scale structure of the universe –… Transcendent Universe Transcendence SimulationNew📱This simulation explores the potential for a universe beyond our observable one, considering… Ultimate Energy Dark Energy SimulationNew📱This simulation examines the nature of dark energy and its role in accelerating the… Infinite Universe Expansion SimulationNew📱This simulation allows you to explore the observable universe’s expansion by manipulating… Dark Matter Web — Three.js SimulationNew📱This simulation provides an interactive visualization of the hypothesized 'dark matter web,'… CMB Sky Map Simulation — Cosmic Microwave Background Temperature FluctuationsNew📱Interactive Cosmic Microwave Background (CMB) sky map simulation. Generate a procedural… Dark Matter HaloNew📱Set halo mass and concentration to shape the density profile and see how much dark matter… Cosmic WebNew📱Let gravity pull thousands of galaxies into filaments, sheets and clusters, leaving the vast… Hubble's Law — Expanding Universe📱Vary the Hubble constant and watch galaxies recede faster with distance, mapping redshift to… Galactic Rotation Curve📱Add or remove the dark matter halo and see why stars in a galaxy's outskirts orbit far… Galaxy Rotation Curves — Dark Matter Evidence📱Compare the falling Newtonian prediction against observed flat galaxy rotation curves, built… Exoplanet Transit — Detecting Planets via Light Curves📱Set planet radius, orbital period and inclination, then read the transit dip in a star's… Big Bang Nucleosynthesis — First 20 Minutes📱Follow the first 20 minutes after the Big Bang: track the neutron-to-proton ratio and see… CMB — Cosmic Microwave Background Power Spectrum📱Turn the dials on baryon density, dark matter and the Hubble constant and watch the acoustic… Primordial Nucleosynthesis — Big Bang First 3 Minutes📱Set the baryon density and watch the first three minutes forge hydrogen, helium and lithium,… Dark Matter — Galaxy Rotation Curves📱Compare the predicted Keplerian drop-off against observed flat galaxy rotation curves and… Gravitational Redshift📱Watch a photon lose frequency escaping a gravitational well — compare two clocks and see… Schwarzschild Geodesics📱Launch particles or photons around a black hole and watch orbital precession, plunging… Hubble Tension — Two Ages of the Universe (2D)📱A flat, top-down 2D view of two identical ΛCDM universes expanding side by side from the…