Labs / Astronomy
Astronomy
Planets, stars, and the whole sky — set in motion and to scale.
Solar System Orrery
Speed up the planets and watch orbits race
Open →Mars Retrograde Loop
Watch Mars trace a backward loop as Earth passes
Open →Sidereal vs Solar Day
Spin Earth to reveal two different day lengths
Open →Planetarium Sky Chart
Set your latitude and time to see the sky
Open →Build an Orbit
Fire a probe and shape its conic-section path
Open →Kepler's Equal Areas
Sweep equal areas as a comet speeds and slows
Open →Kepler's Harmonic Law
Drag a planet out and watch its year grow
Open →Escape Velocity Launcher
Launch upward and find the speed that never returns
Open →Gravity Slingshot
Steer a probe past a planet for a speed boost
Open →Lagrange Points
Drop test masses to find the five balance spots
Open →Tidal Locking
Slow a moon's spin until one face stays fixed
Open →Parallax Distance Finder
Shift Earth's orbit to measure a star's distance
Open →HR Diagram Explorer
Plot stars by temperature and see the main sequence
Open →Stellar Life Cycle
Pick a star's mass and run its whole life
Open →Blackbody Star Color
Heat a star and watch its color and spectrum shift
Open →Reading Starlight
Match dark lines to identify a star's elements
Open →Exoplanet Transit
Pass a planet across its star and dim the light
Open →Stellar Wobble Detector
Spot a hidden planet by its star's Doppler shift
Open →The Habitable Zone
Change a star's heat and place a liquid-water world
Open →Expanding Universe
Stretch space and see distant galaxies redshift more
Open →Galaxy Rotation Curve
Add dark matter to flatten a galaxy's spin curve
Open →