Home▸Space & Astronomy▸The Habitable Zone: Calculating Where Water Stays Liquid

🌡️ The Habitable Zone: Calculating Where Water Stays Liquid

Interactive 3D star system where adjusting stellar luminosity and planet distance updates a simulated habitable-zone band showing where liquid water could exist on a planet's surface.

Space & Astronomy3DModerate60 FPS

An interactive 3D star system where dialing a star's luminosity up or down redraws the habitable-zone band, while dragging a planet through it reveals whether starlight would leave its surface boiling, frozen, or holding liquid water.

🔬 What It Demonstrates

The habitable zone's inner and outer edges scale with the square root of stellar luminosity, since flux falls off with distance squared. Planet albedo and orbital distance jointly set the equilibrium surface temperature.

🎮 How to Use

Adjust the star's luminosity, the planet's orbital distance and albedo, and switch between conservative and optimistic habitable-zone models. Watch the green band and the planet's status update in real time.

💡 Did You Know?

A star just twice as luminous as the Sun pushes its entire habitable zone roughly 40% farther out — which is why searches for Earth-like exoplanets weight a star's brightness as heavily as a planet's size.

⚙ Under the hood

Interactive 3D star system where adjusting stellar luminosity and planet distance updates a simulated habitable-zone band showing where liquid water could exist on a planet's surface.

habitable-zoneexoplanetsastrobiologystellar-luminosityastronomy

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install