The Sun: how big is it?
The Sun is about 1.39 million km. In everyday terms, that is ≈ 109 Earths.
- Size
- 1.39 million km
- In metres
- 1.39 × 10⁹ m
- Everyday comparison
- ≈ 109 Earths
- Chapter
- Stars
Did you know?
The Sun holds about 99.8% of all the mass in our solar system.
How it compares
- About 3.6× bigger than Earth → Moon distance (384,000 km).
- About 1.7× smaller than Sirius (2.38 million km).
Other things of a similar size
- Saturn 116,000 km
- Jupiter 140,000 km
- Earth → Moon distance 384,000 km
- Sirius 2.38 million km
- Sagittarius A* (black hole) 24 million km
- Arcturus 35 million km
Sizes are rounded, typical values drawn from standard reference sources, including NIST/CODATA physical constants and NASA's planetary fact sheets. Real objects vary; see About for how sizes are chosen.