Neptune's orbit: how big is it?
Neptune's orbit is about 9 billion km. In everyday terms, that is ≈ 6,470 Suns.
- Size
- 9 billion km
- In metres
- 9.00 × 10¹² m
- Everyday comparison
- ≈ 6,470 Suns
- Chapter
- The Solar System
Did you know?
Neptune takes about 165 years to travel once around the Sun.
How it compares
- About 8.5× bigger than Betelgeuse (1.06 billion km).
- About 1,100× smaller than One light-year (1 light-years).
Other things of a similar size
- Sirius 2.38 million km
- Sagittarius A* (black hole) 24 million km
- Arcturus 35 million km
- Earth → Sun distance 150 million km
- Betelgeuse 1.06 billion km
- One light-year 1 light-years
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.