Explore the Universe
Pick a planet in the explorer, then dive deeper with calculators, simulations and explainers. Everything is free and works on mobile.
Illustrative view — planet sizes and distances are not to scale (real scale would make planets invisible). Orbital speed is compressed for viewing.
Earth
Our home: the only known planet with liquid-water oceans, an oxygen-rich atmosphere, and life. Its axial tilt drives the seasons.
- Gravity
- 9.807 m/s²
- Year length
- 365.2 days
- Day length
- 23.9 hours
- Mean temp
- 15 °C