Topographic features of the Moon 5, Topographical features of the Moon

The main impact theory and the volcano theory are currently accepted to be the "impact theory", which holds that so many craters are traces left over from the impact of meteors and meteorites on the moon for a long time. Because there is no air on the moon, it is equivalent to a sinking layer of protection, making the impact more violent. It is also believed that the craters on the moon may have been formed by volcanic eruptions.

But judging by the phenomena observed so far, the moon has never had frequent and intense volcanic activity in the past 4.6 billion years, so this claim was quickly refuted.

Topographical features of the Moon: The things that are easy to see with the naked eye are the Lunar Sea of the Moon. Those bumps are those cyclic hills on the moon.

Huge losses to institutions.

On the moon there are mainly as:

1. Crater, the name crater was given by Galileo. It is a distinctive feature of the lunar surface, covering almost the entire lunar surface. The largest crater is the Bailey crater near Antarctica, with a diameter of 295 kilometers, which is slightly larger than Hainan Island.

A small crater may even be a pothole of a few tens of centimeters. There are about 33,000 of them with a diameter of not less than 1,000 meters. It occupies 7%-10% of the surface area of the moon.

2. Moon Sea, there are 22 moon seas that have been identified, in addition to some terrain called"Moon Sea"or"Moon-like sea"Target. The vast majority of the recognized 22 are located on the front side of the moon. There are 3 on the back, 4 in the marginal area.

3. The lunar land and mountains, the area above the lunar sea is called the lunar land, which is generally 2-3 kilometers higher than the lunar sea level, and it seems to be relatively bright because of its high albetry. On the front side of the Moon, the area of the lunar land is roughly equal to that of the lunar sea, but on the far side of the moon, the area of the lunar land is much larger than that of the lunar sea.

4. Radiant pattern on the lunar surface, there is also a major feature on the lunar surface is some comparison"Young"The craters often come with a beautiful one"Radiant streaks", which is a bright band that extends in all directions with a crater as a radiant point, which passes through the mountain system, the moon sea and the crater in an almost straight direction. The length of the radial streak and the ridge of the bright envy varies, the most striking is the radiant streak of Tycho Crater, the longest of which is 1,800 kilometers long, and is especially spectacular during the full moon.

5. Moon Valley, there is also this kind of foundation on the lunar surface--- those large black cracks that seem to be crooked are the Moon Valley, some of them stretch for hundreds to thousands of kilometers, and the width varies from thousands of meters to tens of kilometers.

6. Volcanoes, lunar volcanoes can be described as old dragon clocks. Most lunar volcanoes are between 3 billion and 4 billion years old; Typical shady plains, 3.5 billion years old; The youngest lunar volcano is also 100 million years old.