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1 AU = 149.6 million km (Earth-Sun distance). 1 light-year = 9.461 × 10¹² km. 1 parsec = 3.26 light-years. Alpha Centauri (nearest star system): 4.37 light-years. Andromeda galaxy: 2.537 million light-years. At the speed of light, signals take 8.3 minutes to reach Earth from the Sun and 4.24 years from Alpha Centauri. Interstellar travel remains in the realm of science fiction.
🚀 Rocket to 🌙 Moon
Distance: 384.4k km
10 hours
Light takes ~1.3 seconds to travel from the Moon to Earth.
| Mode | Speed | Travel Time |
|---|---|---|
| 🚶Walking | 5 km/h | 9 years |
| 🚗Car | 100 km/h | 160 days |
| 🚅Bullet Train | 320 km/h | 50 days |
| ✈️Airplane | 900 km/h | 18 days |
| 🚀Rocket | 40,000 km/h | 10 hours |
| ⚡Speed of Light | 1,079,252,848.8 km/h | 1 second |