Largest planetary system (by diameter)
- Who
- Solar System
- What
- 9,300,000,000 mile(s)
- Where
- Not Applicable
- When
- 2010
Of the more than 3,700 planets orbiting other stars discovered as of March 2018, none are yet known to exist within a planetary system as large as our own Solar System, which is thought to be 100,000 AU (9.3 billion miles; 15 billion km) across.