Look up. Then look down at this page. Each instrument here is a small live model of something happening above you right now — the day-night terminator sliding around the planet, eight thousand satellites in their real orbits, the magnetosphere flexing in response to today's solar wind. The sky as a working diagram.
Assemble a multi-stage rocket from engines, tanks and a nose cone, then fly it to the Kármán line — live throttle, pitch and staging against real thrust, gravity and drag.
Live TLE-propagated 3D Earth that finds the freshest Starlink launch still flying in single-file formation — the "train" — and lights it up against the dimmed constellation, with its ground track and orbital readout.
A 3D Earth wrapped in tracked orbital debris from the great fragmentation events — Fengyun-1C, Iridium-33, Cosmos-2251 — propagated live with satellite.js and colored by source event, telling the Kessler-syndrome story shell by shell.
A live view of the Sun straight from NASA’s Solar Dynamics Observatory — switch wavelengths to peel back the corona, the chromosphere and the magnetic field.
A live gallery of raw Mars rover photographs — pick a rover, scrub through the Martian sols and cameras, and watch the surface arrive frame by frame.
A live readout of the wind blowing off the Sun — real-time speed, density, and the interplanetary magnetic field from NOAA, read for storm level and aurora odds as a southward Bz pries the magnetosphere open.
A live board of asteroids skimming past Earth — each plotted by how close it passes and how big it is, straight from NASA’s close-approach feed.
A live explorer of every confirmed exoplanet — radius against orbital period, coloured by how each world was found, straight from NASA’s Exoplanet Archive.
A live Earth lit by the actual sun. The day-night terminator tracks real UTC; city lights glow on the night side; clouds scroll above the surface; the atmosphere's blue halo wraps the limb.
8 000+ active satellites in real-time TLE-propagated orbits around a 3D Earth; click any dot for name, NORAD ID, altitude, and period; filter by constellation.
Earth's dipole field lines and magnetopause shaped live by NOAA SWPC solar-wind data; southward Bz triggers a suggestive reconnection animation. Dipole approximation, Shue 1997 model.
Every airborne aircraft from OpenSky as instanced dots over a 3D globe, each trailing ~3 minutes of fading contrail history dead-reckoned between live fixes.
A 3D fly-through of the Sun’s local stars — the nearest and brightest suns within fifty light-years, coloured by spectral class and ringed by distance shells.
Trace the stick-figures of 36 constellations and read the Greek and world myths behind each pattern of stars.
Watch a planet cross its star and carve the tiny dip in brightness that lets astronomers detect worlds light-years away.
Why the ocean bulges twice — the Moon and Sun stretch the seas by gravity, and their alignment swings the tide between spring and neap.
Pick a star’s birth mass and watch its whole life play out — a marker tracing its track across the HR diagram while the star itself swells, puffs and dies, with the fate (white dwarf, neutron star or black hole) and the wildly mass-dependent lifetime set by real scaling laws.
A smooth logarithmic flight through 62 orders of magnitude — from the Planck length past quarks, DNA, humans, Earth, the Sun, the Milky Way, all the way to the edge of the observable universe.
Thousands of icy ring particles ride Keplerian orbits around Saturn — and the Cassini Division opens exactly where the 2:1 resonance with the moon Mimas clears them, while Pan herds the Encke gap shut.
A clockwork Solar System where all eight planets ride their true ellipses at the correct relative speeds — Mercury sprinting, Neptune crawling — solved live from real Keplerian elements.
A live planetarium: pick a place and a moment, and the brightest stars wheel about the celestial pole with their constellations drawn in.
A physically-lit 3D Moon whose terminator and illuminated fraction are computed from the real Sun–Earth–Moon geometry for any date — scrub time and watch the maria slide under the shifting light.
The year’s great meteor showers, made watchable: streaks rain outward from each shower’s radiant, with peak rates and active windows laid across the calendar.
You never see the universe as it is now — only as it was when the light left; watch a pulse crawl outward at c and feel how deep the past you are looking into.
Three planets trace true ellipses around the Sun while the swept-area and harmonic laws come alive on screen.
The Hertzsprung–Russell diagram drawn live: a whole stellar population scatters into the main sequence, the red-giant branch and the white-dwarf graveyard, and you can watch a star of any mass trace its evolutionary track across it.
Steer the Moon through its tilted orbit and watch shadow cones line up the Sun, Earth and Moon into total, annular and lunar eclipses.
Climb the cosmic distance ladder rung by rung — radar in the solar system, the parallax wobble of nearby stars, pulsating Cepheids and Type Ia supernovae as standard candles, and Hubble’s law to the edge of the visible universe — each method calibrating the next across more than twenty orders of magnitude.
Thousands of asteroids ride Keplerian orbits between Mars and Jupiter — and the Kirkwood gaps open up exactly at the mean-motion resonances where Jupiter clears them.
Every SpaceX flight as a mission console — a scrollable flight log with success and failure markers, a live success-rate gauge, and a patch-and-links dossier for each launch.
All eight planets orbiting the Sun with Keplerian elements, toggle between "pretty" exaggerated scale and true-to-scale mode to feel how empty space actually is.