Why is the phenomenon of an asteroid hitting the moon not visible from Earth?

Craters are a relatively common landform in the solar system, and almost all asteroids in the solar system are full of impact craters, the Moon, Mercury, Saturn, Mars, Venus, Europa, Callisto, ......There are many craters on all major rocky planets.

A crater (a larger crater is also known as a crater) is a crater formed by the impact of meteorites on the surface of celestial bodies such as planets, moons, and asteroids. There is often a hill in the center of the crater.

So why is it so hard to see on Earth? Can this phenomenon be explained scientifically? 1.

It can be said that many meteorites that were originally going to crash into the earth were blocked by the moon and defended the earth, but the moon suffered, and in this regard, we should still be grateful to the moon for shielding the earth from meteorite impacts.

2.It is very important that the Earth has an atmosphere. The altitude of the atmosphere in the broad sense is thousands of kilometers, and of course the dense atmosphere is still thousands of kilometers above the ground, but don't underestimate these invisible and untouchable air.

When the meteorite breaks into the earth's atmosphere, the atmosphere and the meteorite are fully rubbed, and the smaller meteorite is directly burned down, and the larger one is burned even smaller, or directly becomes a smaller meteorite, in short, the existence of the earth's atmosphere makes the meteorite that crashes into the earth reduce the damage to the earth a lot.

Although craters are hard to see on Earth, it doesn't mean they don't. At present, more than 200 craters have been found on the earth, of course, in the long history of 4.6 billion years ago, there are more than these alien visitors who have attacked the earth, but the traces they left have disappeared without a trace due to erosion, magma and other actions.

The Earth has been hit by asteroids many times, but not very frequently, about once in a few million years.

In the few thousand years since the development of human civilization, no major asteroid has hit the Earth. Fortunately, human civilization has developed technology, even if there are asteroids in the future.

The orbit coincides with the Earth's orbit, and human beings have enough scientific and technological means to save themselves--- it is not very difficult to launch a nuclear bomb to cause an asteroid.

Capturing asteroids is still very difficult for the technology currently mastered by mankind;

Launching a nuclear bomb to destroy an asteroid is not easy for the technology currently mastered by mankind, but it can be basically done;

Launching a nuclear bomb to cause an asteroid is not difficult at all for the technology currently mastered by mankind.

It's too far away, too far away, and you can't see ...... at all

In fact, we can not only see the sun and moon on Earth, that is, we can observe with the naked eye. In addition to the Sun and Moon, we can also observe other planets. Of course, it's also about the weather conditions and everyone's eyesight!

In general, five planets are visible to the naked eye on Earth. They are Venus, Jupiter.

Saturn, Mars, and Mercury.

Among them, Venus is the brightest planet in the sky (except for the Moon). It's easy to see Venus at night! Mercury is relatively the least visible, as it is very close to the Sun and looks faint under the intense solar halo!

Of course, even Venus is no different from other stars in the night sky.

It doesn't stand out like the Moon, so the average person won't pay attention to the presence of Venus! The reason why the moon is so bright is simple because it is so close to the earth! If you use an astronomical telescope instead of the naked eye, you can see the moon clearly.

The craters on the surface, the stripes of Jupiter, the beautiful rings of Saturn.

You can also see Uranus.

and Neptune. However, the requirements for astronomical telescopes are relatively high.

Ordinary telescopes can only see one point of Neptune because the distance is too far. If you only see one dot, it doesn't mean much, after all, it's like looking up at the stars in the sky! Even professional and high-end telescopes can hardly see Pluto.

Even the most advanced Hubble telescope. Of course, looking and seeing are completely different concepts. If you only see a blurry fragment or a small dot, even if you see it, it doesn't mean anything! Finally, the ability to see planets is not directly related to magnification.

The most important thing is the aperture. Theoretically, as long as the aperture is large enough, you can see the planet at any distance! The misconception that only the sun and moon can be seen is mainly due to the misleading "observable planetary volumes".

To put it bluntly, only the sun and the moon are larger on earth. Solar system.

The other planets are essentially visible to the naked eye in the same state as the stars outside our solar system, the "stars" we see in the night sky. In fact, there are three main factors that determine the outcome of human observation of the planet with the naked eye, its size, brightness, and distance from Earth.

It is because the sun can shine on its own, and the moon reflects the light of the sun stool, and the other planets do not reflect the light in a closed way, so we can't see the planets.

This is because for other planets, they are far away from the earth, and these planets do not actively reflect some of the light, mainly by reflecting the sun's light, so compared to the sun and the moon, their sensitive light is very weak.

On Earth, there are Venus, Mercury, Mars, Jupiter and Saturn can be clearly seen with the naked eye, so among the seven planets, only these five planets have names in ancient China, but because they are too far away from the earth, only the use of astronomical telescopes can see the details of these five planets.

Saturn Saturn is a gaseous planet, with a mass 95 times that of the Earth, and because it is too far away from the Sun, the average surface temperature is more than minus 100 degrees Celsius, with a maximum apparent magnitude and an Earth rotation period.

The ancient Chinese believed that Saturn rotates every 28 years, as if sitting on one of the 28 constellations every year, so Saturn is also known as the town star.

In 1610, Galileo Galilei pointed his telescope at Saturn and accidentally discovered that Saturn had two "ears", which Galileo thought were protruding from both sides of Saturn, and recorded the image he saw

However, a few years later, Saturn's "ears" suddenly disappeared, much to Galileo's surprise, but he could not explain why; Now we know that what Galileo saw in the telescope was actually Saturn's rings, which disappear when they are facing the Earth, and disappear about once every 15 years.

Mercury is in the solar system, Mercury is the closest big planet to the sun, the average distance from the sun is 38% of the distance between the sun and the earth, the maximum apparent magnitude, Mercury is also known as the star in ancient China.

It is precisely because Mercury is so close to the Sun that there are basically only three situations where Mercury can be seen with the naked eye when observing from Earth:

1) When Mercury is at great eastern elongation, it will be visible at dusk;

2) When Mercury is at its greatest western elongation, it will be visible in the early morning;

3) During a total solar eclipse, it is possible to see Mercury.

Venus Venus, also known as the Morning Star, is the second brightest celestial body in the night sky after the Moon, the apparent magnitude can reach, it is called the Morning Star in the early morning, and it is also called the Chang Gung Star at dusk.

Since Venus is an inner planet, Venus, like Mercury, is completely on the night side of the Earth and cannot be seen.

When Mars opposes the Sun, the apparent magnitude of Mars can reach, at that time Mars will become the brightest star in the night sky, Mars is the first planet outside the Earth's orbit, and the position and brightness vary greatly when observing on the Earth, and even sometimes there will be a "retrograde" situation (in fact, it is not retrograde, but the reason for the observation angle), so Mars is also known as the Luminous Star in ancient China.

JupiterJupiter, also known as the year star, is the largest planet in the solar system, with a mass twice that of the other seven planets combined, one-thousandth the mass of the Sun, and a maximum apparent magnitude of at least 79 moons.

Due to the mass of Jupiter, if you look at the Sun and Jupiter separately, they actually orbit each other, and their orbiting centers will fall outside the Sun, 40,000 kilometers away from the surface of the Sun.

Because the other planets are very far away from the Earth and have very little light reflected to the Earth, the other planets cannot be seen.

Because the range of things that can be seen by the human eye is relatively small, and other planets are too far away from us, they cannot be seen with the human naked eye, and other instruments must be used.

Generally speaking, usually only the sun and moon are seen on the map, and it is also because these other conditions are too far away for everyone, so in the eyes of everyone it is only a planet's specification, and in the night sky, everyone sees a large part of the starry sky, in fact, a large part of it is planets, so just because the distance is too far, everyone can't see their true meaning, which is also because of some of the core reasons shown below.

Generally speaking, sometimes the lady is too large, and because of this, within the recognizable range of the earth, only the sun and the moon are seen on this trip. Among them, I can find out that there is a lack of appearance, because the cosmic space will be very large, and because of this, within the recognizable range of the earth, only the sun and the moon can be seen, and in some ways, because the sun lady is too large, and the moon is relatively close to the earth, so it is precisely because of this that everyone who sits on the floor wants to see the moon of the sun.

It's not that you can't see other red stars when you walk on the road, just because the planet is too far away from everyone, so most of them are like small beetles. For us, it's not that we can't see other planets on Earth, because such planets are so far away that such a large observer on Earth can't see this kind of starry sky.

Nowadays, in most cases, the sun and moon are relatively close to everyone, and it is precisely because of this that everyone can see the sun and moon at will, and compared to other planets, they are far away, so they cannot get close to them.

In fact, you can admit that in most cases, the sun and the moon are usually easily seen, and because they are too large, and they have to be closer to the earth, and therefore because of this, the light source they cause, that is, the light in the vertical plane, is more acceptable to us, but because of the distance from other tourist attractions, and because of this, people rarely see them in real terms.

For us, in most cases, we can see the sun and the moon on the earth in most cases, and because of this important relative proximity, it is very close to the profession, but it is true that the other planets are too far away to see other information.

The planets that humans have dug or are visible to the naked eye on Earth are the sun and the moon. The moon does not shine in itself, but reflects the light of the sun. You can also see a lot of stars at night. These stars are other stars.

The Sun can also be seen on other planets, but the Sun is much smaller on other planets than on Earth.

If you use an astronomical telescope, you can also observe other planets, but you can't see them with the naked eye.

exists, but the light they emit is not particularly strong, so it is invisible, and it is relatively far from the earth.

It's not clear what you mean by "withstanding". Does it mean that the surface of the moon is riddled with holes, indicating that it has endured numerous impacts, but it seems to be trapped and "nothing has happened to the impact"?

In fact, the Earth has endured many times more impacts from foreign objects than the Moon – the Earth is more than 80 times more massive than the Moon, and the process of accumulating mass is itself a variety of impacts. The only reason the Earth is "fragile" is that it has a biosphere, and an impact that is enough to cause biosphere destruction ("mass extinction") would seem to humanity to be the end of the world. As everyone knows, this kind of impact is basically a piece of cake for the structure of the earth itself.

In addition, the reason why craters appear very few on the Earth's surface is mainly due to the erosion of geological movements, atmospheric and flowing water movements. Due to the influence of these factors, the existence of any crater on the surface of the earth will not exceed 1,02 billion years, while the existence of craters with a diameter of hundreds of kilometers will only be tens to tens of millions of years. The same is true of other planets or moons that have atmospheres and fluid surfaces.

Summary: The wide-canopy-ridden Moon "withstands" an impact, and it appears that "nothing has happened to the impact" simply because it has no living things on its surface and no environment in which it lives, so it appears that "nothing can be destroyed". However, this view itself reflects a kind of irresponsible carelessness – the craters outlive the impact marks of the same size on Earth, and they themselves are a record of the release of huge amounts of energy.

And nothing happened as a result of the impact".

According to the time of observation, the results obtained are different, the distant universe can only be observed by the light emitted by the stars, in addition to the stars, there are several planets in the solar system that can also be observed with the naked eye, such as Venus, Mars, Jupiter, Saturn.

If you observe it regularly, you will find that there is always a planet that is very close to the moon, or even blocked by the moon, in the same way as a solar eclipse. So why is that?

Why are the planets in the solar system blocked by the moon? This is related to the angle of orbit between the planets, if the angle of the Earth's revolution around the Sun is taken as the benchmark, the angle between the eight planets and the Earth's orbital plane is not more than 10 degrees, which means that they have a chance to line up with the Earth.

There is an angle between the plane of the moon's rotation around the earth and the plane of the earth's revolution, which is only 5 degrees, almost the same. In other words, as long as the rotation time is long enough, there is always a chance to observe the phenomenon of the Moon blocking other planets.

The most visible phenomenon of lunar occlusion is on April 28, 2020, and if you look closely at the sky that day, you will notice that there is an extremely bright star next to the moon, and that is Venus, the third brightest object in the sky. Stove Sparrow.

The top two are, of course, the sun and the moon. Some people will regret not taking advantage of this opportunity, so when is the next best time to make an observation? The answer is next year, on December 7, 2021, when the brightest lunar occultation of Venus will be observed.

It is recommended to observe after sunset or before sunrise, which is best.

The images of lunar occultation planets captured by other telescopes because the moon always has a chance to block other planets, although we don't know when we can see it, or because the planets are not bright enough to be observed with the naked eye, we can still directly observe the pictures taken by others with telescopes, let's take a few photos below.

The image above shows the Moon occluding Mars.

The image above shows the Moon occluding Saturn.

The image above shows the Moon occluding Jupiter and its moons.