Longest channel in the Solar System
- Who
- Unknown
- Where
- Southern Atalanta Planitia,
- When
- 18 November 2002
The longest channel in the Solar System is Baltis Vallis, on Venus. It is around 7,000 km (4,300 miles) in length and has an average width of around 1.6 km (1 mile). It was discovered by the Magellan radar mapper, which orbited Venus from August 1990 to October 1994, and is believed to have been formed by molten lava.