South Pole-Aitken basin - Moon - Diameter: 2,500 km http://en.wikipedia.org/wiki/Impact_crater#Largest_named_craters_in_the_Solar_System --Geoffrey A. Landis
The Caloris Basin is an impact basin. It is one of the largest impact craters in the solar system. It was created after the heavy bombardment period and is estimated to be 3.8 billion years old.
The Aitkin Basin is a huge impact crater on the moon, 1,600 miles in diameter and 8.1 miles deep. It is the oldest, deepest and largest crater on the moon, and one of the largest in the entire solar system.
The largest impact basin on the Moon is the far-side South Pole-Aitken, which is 1,400 miles (2,250 km) in diameter and on average 39,000 ft (12,000 m) deep below its rim. This is the largest and deepest such crater known in the Solar System.
The largest planet in the solar system is Jupiter.
Uranus is the third largest planet in the solar system.
The Caloris Basin is an impact basin. It is one of the largest impact craters in the solar system. It was created after the heavy bombardment period and is estimated to be 3.8 billion years old.
South Pole Aitken Basin (diameter 2500km) is not the largest known impact crater. That distinction lies with Utopia Planitia Basin (3500km) on Mars. However, SPA is the deepest known impact basin in the Solar System at 13 kilometers. If proven, the hypothesized Borealis basin, on Mars, would be the largest impact basis, at more than 10000 km in diameter.
The Caloris Basin on Mercury is certainly one of the largest impact craters in the Solar System. As to the largest in the Milky Way - you'll just have to wait and see.
Caloris Basin (also known as the Caloris Planitia) is an impact crater on Mercury about 1,550 km in diameter, known as the largest crater in the Solar System.
The Caloris Basin is a large impact crater found on the planet Mercury, 963 miles in diameter. Its one of the largest craters in the solar system.
The Aitkin Basin is a huge impact crater on the moon, 1,600 miles in diameter and 8.1 miles deep. It is the oldest, deepest and largest crater on the moon, and one of the largest in the entire solar system.
Mercury doesn't have many geographically distinct features but it does have a feature called the Caloris Basin. The Caloris Basin is one of the largest meteor impact basins in the Solar System. It measures at about 1,550 kilometers or 960 miles in diameter. Since the Caloris Basin is the largest feature on Mercury it is also it's longest.
The South Pole-Aitken basin (not "Aitken crater") on the far side of the moon, at 1,600 miles across, is not only the largest known impact crater on the moon but one of the largest in the solar system. It is also believed to be the moon's oldest and deepest (over 8 miles deep).
The largest impact basin on the Moon is the far-side South Pole-Aitken, which is 1,400 miles (2,250 km) in diameter and on average 39,000 ft (12,000 m) deep below its rim. This is the largest and deepest such crater known in the Solar System.
The largest planet in the solar system is Jupiter.
Well, Mars has the largest mountain in our solar system, Olympus Mons. Mars also has the largest canyon in our solar system, called Valles Marineris. Mars also has a Borealis Basin which covers 40% of it's surface area.
Ganymede is the largest moon in our solar system.