Where is the deepest gorge in the solar system?

The deepest known gorge in the Solar System is Valles Marineris on Mars. It is known that it is the deepest gorge on any rocky planet in the solar system, because we have already mapped all four in detail (Mercury, Venus, Earth and Mars) and found nothing deeper. Valles Marineris is 4,500 km (2,800 miles) long, 200 km (125 miles) wide and deep as 7.7 km (4.8 Mi). For comparison, the Grand Canyon is 446 km (277 miles) long, ranges width from 6.4 to 29 km) (4 to 18 mi) and reaches a depth of about 1.6 km (1 Mi). The deepest slot on our planet, the wet and geologically active surface of the Earth, is not suitable for the formation of extremely deep corners. Although still unknown, it may be that there are currently deeper rolls in the solar system, such as rocky cores of gas giants or external solar system, such as Pluto or Eris. The New Horizons spacecraft is on the way to Pluto and arrives there in 2015, allowing us to map the Pluto surface in detail and determine the bikeMity of any deep corners.

The cause of Valles Merineris's creation is believed that most scientists are a tectonic crack created during planetary cooling and subsequently spread due to erosion. If so, the gorge can be extremely old. Valles Merineris means the Mariner Valley in Latin, named after Mariner 9, orbiter NASA Mars, who discovered the abyss in 1971. Valles Merineris shares a planet with the highest mountain of the solar system, Olympus Mons, several times higher than Mount Everest.

Merineris Valles can be a favorable colonization goal for people in the future. Due to its depth, the valley is protected from Cosmic rays and intense heat.