Scientists know, not think, Neptune has zero craters.
Neptune is a gas giant. Gas giants do not have a solid rocky surface. Therefore nothing can impact against the planet to form craters.
Scientists can see Neptune with telescopes. Also, they have many photos of it from when the Voyager 2 passed by.
The moon is known for having many craters. Some of the craters have been given names by various astronomers and scientists, based on explorations of the moon done by NASA
The reason that this was that it was once the only thing that scientists could use to explain why the moon had so many craters on it (which we now know to be the product of meteorite and asteroid collisions).
Neptune's moon Proteus measures 420 kilometers in diameter. This moon is shaped like a sphere, has many craters, and is neutral in color.
Neptune has 13-14 moons. Scientists are not sure whether it is a moon or an asteroid.
72 craters are on mars. And a few more, I think.
There are lots of craters on Mercury. For a more precise answer, we would first want to specify the size, by asking for example how many craters of at least one meter in diameter are there on Mercury.
Because there are few erosion processes on the Moon to erase the craters. The Earth has had many more impacts, but those in the ocean were covered up and those on land were eroded away.
Craters on the moon are not volcanic, they are impact craters.
It is hard to identify one specific coldest stop in the solar system. Many places approach absolute zero, such as permanently shadowed craters on the Moon's poles, many moons of Neptune and Uranus, and most Kuiper belt objects beyond Neptune.
There are 375 craters in the moon.....
Because the Moon has so many impact craters, scientists believe that this was caused by meteoroids, asteroids, and comets colliding into its surface at an average speed of 20 kilometers per second. The Moon's surface has millions of both simple and complex impact craters.