The Speed of Light

In Real Time.

Light is fast. It travels 229,792 km (or 299,792,458 m) every second, or 186,282 miles per second. But space is also large. Our own galaxy would take 200,000 years to cross at the speed of light. Once a photon leaves the Sun, on average it will take more than 4 hours to cross the orbit of Nepture. Click the button below to run a simulated journey of a beam of light as it leaves the Sun and crosses the Solar System.

Run Simulation