What is the greatest impact of crater in the solar system?

The largest known crater impact in the solar system is a huge unnamed scar on the surface of Mars, 10,600 km long 8,500 km wide. It is assumed that it was created at the earliest age of the Solar System, when the Moon -size object almost hit Mars, but instead scratched a deep scar on the planet. Something similar to the country has happened and released so much material that it later came together to create the moon. It is assumed that these great impacts were created planetoids, which were formed at lagrange points, gravitational wells located in three other points in the Earth's orbit. Mars also has its own Lagrange points. It is also the only confirmed canyon that is known to exist because of meeting with bolide (asteroid or planetoid) rather than erosion of water or cracking of the surface due to native geological processes. Knowing that the scar is the impact of Crater is quite recent, published in Science only in 2008.

The second largest impact crater in the Solar System is the South Pole basin on the Moon, at 2,500 km (1,553 miles) wide and 15 km deep (9.3 Mi). The crater was made when a large comet or an asteroid affected the moon during a late heavy bombing, a period of intensive impact activity between 3800 and 4100 million years, where most of the solar system was still in the interplanetary space and had to find somewhere to land. Pasin South Pole-Aitken is one of the only impact craters in the solar system, which is called a "basin" rather than a crater. The only impact of a crater comparable size except previously described is Helllas Planitin on Mars, about 2,300 km (1,429 million) in the range. The Passin of the South Pole is the dominant feature of the other side of the month, the acting most important slump to Lunar Highlands.