Star
Sun
The Sun is a G-type main-sequence star at the center of the solar system, holding about 99.86% of its total mass. It fuses hydrogen into helium in its core, releasing the energy that powers nearly all life on Earth, and its gravity keeps every planet in orbit. It is about 4.6 billion years old and roughly halfway through its main-sequence life.
- Diameter
- 1,392,700 km (about 109 Earths)
- Mass
- ~333,000 Earths
- Surface temperature
- ~5,500 °C
- Core temperature
- ~15 million °C
- Rotation period
- ~25 days (equator)
- Distance from Earth
- ~149.6 million km (1 AU)
- Composition
- ~73% hydrogen, ~25% helium
- Age
- ~4.6 billion years