Which planet has a heavily cratered surface?
Callisto is Jupiter’s second largest moon and the third largest moon in our solar system. Its surface is the most heavily cratered of any object in our solar system.
Which planets have cratered surfaces?
Craters are found on all of the terrestrial planets—Mercury, Venus, Earth and Mars. The surfaces of asteroids and the rocky, ice covered moons of the outer gas planets are cratered as well.
What causes cratering on terrestrial planets?
Craters are the most common surface features on many solid planets and moons—Mercury and our Moon are covered with craters. This portion of the Moon is covered by numerous circular holes. These are impact craters, each of which was formed when an asteroid or comet collided with the Moon’s surface.
Does Venus have a cratered surface?
Craters on Venus are different from craters on other planets. The planet’s thick atmosphere stops the smaller objects from even reaching the surface of Venus; they just burn up in the atmosphere. There are about 1000 craters identified on the surface of Venus.
Why is the Moon so heavily cratered?
Why does the Moon have so many craters compared to the Earth? Unlike the Earth, the Moon has no atmosphere to protect itself from impacting bodies. It also has very little geologic activity (like volcanoes) or weathering (from wind or rain) so craters remain intact from billions of years.
What is the Moon’s biggest crater?
The South Pole–Aitken basin
The South Pole–Aitken basin (SPA Basin, /ˈeɪtkɪn/) is an immense impact crater on the far side of the Moon. At roughly 2,500 km (1,600 mi) in diameter and between 6.2 and 8.2 km (3.9–5.1 mi) deep, it is one of the largest known impact craters in the Solar System.
Why are there so many cratered surfaces in the solar system?
Why are there so many cratered surfaces in the solar system? There was much debris left over from the formation of the planets and moons, and many collisions in the early solar system.
What is Mercury surface features?
There are three major types of surface features on Mercury: Smooth plains that resemble Lunar maria. Intercrater plains, which are pocked with small craters and occupy about 70% of the surface that we have examined. Rugged highlands that bear some resemblance to the corresponding regions on the Moon.
Why was there more cratering on the surface of the planets early in the solar system’s history and not so much now?
As a rule of thumb, older surfaces have been exposed to impacting bodies (meteoroids, asteroids and comets) for a longer period of time than younger surfaces. Therefore, older surfaces have more impact craters. Mercury and the Moon are covered with impact craters; their surfaces are very old.
Does a comet orbit the Earth?
Comets orbit the Sun just like planets and asteroids do, except a comet usually has a very elongated orbit. As the comet gets closer to the Sun, some of the ice starts to melt and boil off, along with particles of dust. These particles and gases make a cloud around the nucleus, called a coma.
What is a major surface feature on Venus?
The surface of Venus is dominated by geologic features that include volcanoes, large impact craters, and aeolian erosion and sedimentation landforms.