About spatial knowledge (primary school students' spatial knowledge)

A complete collection of space knowledge

Encyclopedia of space knowledge. Space English: Space, Chinese dictionary explains that the sky is extremely high. The International Aviation Federation in Geneva, Switzerland, defines the boundary between the atmosphere and space. The following is a complete collection of space knowledge I have compiled for you, hoping to help you.

Encyclopedia of spatial knowledge 1

Of all the planets in our solar system, only Venus and Mercury have no satellites.

In our solar system, there are 176 confirmed satellites around their main planet, some of which are bigger than Mercury.

2. If the star is too close to the black hole, it will be torn by the black hole.

For 20 years, a group of astronomers have been observing a star orbiting the black hole in the center of the Milky Way.

At present, the star is close enough to the black hole, and there will be a "gravitational redshift", which means that with the gradual increase of the gravity of the black hole, the light of the star will lose energy.

The hottest planet in the solar system is Venus.

Many people think it should be Mercury, because it is closest to the sun.

However, a large number of gases in Venus' atmosphere caused the "greenhouse effect", which made the surface temperature of Venus constant at 462 degrees Celsius.

The solar system is 4.6 billion years old.

To be precise, the age of the solar system is 45438+0 billion years old.

Scientists predict that in about 5 billion years, our sun will swell into a red giant. In about 7.5 billion years, its enlarged surface will devour the earth.

Enceladus, the smaller satellite of Saturn, reflects 90% of the sunlight.

Because its surface is covered with ice, it rarely absorbs sunlight and basically reflects it away. The surface temperature of Enceladus can reach MINUS 20 1 degree Celsius.

6. The highest mountain that has been discovered is Mount Olympus on Mars.

Its peak is 25 kilometers high, almost three times as high as Mount Everest. And it is not only high, but also has an area of 300,000 square kilometers-as big as Arizona.

7. The M51spiral galaxy is the first spiral object we have discovered.

The spiral arms of spiral galaxies are composed of slender stars and gases, and are also covered with a lot of cosmic dust.

These spiral arms are like factories that make stars, compressing hydrogen and creating a new group of stars.

8. A light year is the distance that light travels in a year.

Light 1 sec can move 300,000 kilometers, so 1 light-year is about 5903026326255 miles.

9. The width of the Milky Way reaches 105700 light years.

It will take us 450 million years to reach the center of the Milky Way by modern spaceship.

10, the mass of the sun is more than 330,000 times that of the earth.

The diameter of the sun is about 109 times that of the earth, and it takes about1300,000 earths to fill the sun.

In fact, the mass of the sun is huge, accounting for 99.85% of the total mass of the solar system.

Encyclopedia of Space Knowledge II

1, the atoms that make up our bodies, the calcium in our bones and the iron in our blood are actually part of a supernova billions of years ago. Besides, the hydrogen atoms in our bodies came from BIGBANG137 billion years ago, and almost 99% of the substances in our bodies are empty, so when we take away our space, everyone on the earth will only be the size of a sugar cube!

2. When there is no program on TV, there is Xue Huadian accompanied by noise, of which 1% is caused by the radiation left over from the Big Bang, which is the so-called cosmic microwave background.

3. Is the earth round? Right or wrong, because the earth plate is moving and the shape of the earth is always changing, it is not a perfect circle.

4. Is the sun yellow? No, actually, the sun is a yellow dwarf. It's actually white. We think it is yellow because of the influence of the earth's atmosphere.

5. Will humans without spacesuits be blown up in the universe? The answer is no, because human skin is flexible enough, so that all our internal organs will not run out, and the blood vessel wall will prevent blood from gushing out. In the absence of external pressure, the water in skin cells will boil in vacuum, and the temperature of blood will rise to 46℃, which is higher than the normal temperature of human body. In such an environment, the volume of the human body will indeed become larger, but it will certainly not explode. The main cause of human death in space is lack of oxygen. /kloc-after 0/5 seconds, we will lose consciousness and die within 2 minutes.

6. Will the earth be farther away from the sun in winter than in summer? In fact, the earth is 5 million kilometers closer to the sun in winter than in summer. Besides going around the sun, the earth also goes around its own axis. Solar rays that pass through the north and south poles of the earth's axis and are not completely perpendicular to its orbit and fall on it. In half a year, most of the sun's heat falls in the southern hemisphere and the other half in the northern hemisphere, so the summer in the southern hemisphere is warmer than that in the northern hemisphere.

745 billion years ago, the earth collided with a planet the size of Mars.

8. The surface temperature of the sun is 10000 degrees and the core temperature is160,000 degrees Celsius. When you are away from the sun 150 kilometers, you will be burned to death.

9. It takes 65,438+0.7 million years for a photon to travel from the interior of the sun to the surface. At the same speed, it takes only 8 minutes for a photon to travel from the interior of the earth to the surface.

10, the sun is not static. In fact, it has been circling the Milky Way, but it takes 200 million years for the sun to turn once.

1 1. So far, only three people have died outside the atmosphere, which is a very sad thing.

12. At present, the largest volcano discovered in the solar system is on Mars, which is equivalent to the size of a country in Ireland.

13. Because the moon has no atmosphere, the footprints left by Apollo astronauts in 1969 are still clearly visible.

14, the weight of a spoon neutron star exceeds 1000 billion tons, and the mass of the sun accounts for 99.86% of the whole solar system.

Encyclopedia of space knowledge 3

Space junk can be divided into three categories:

1 is a relatively large object that modern radar can monitor and track, mainly including various satellites, satellite protective covers and various components. At present, there are more than 8,000 kinds of such garbage;

2. It is produced when small objects, such as engines, explode in space, and its number is estimated to be at least several million;

3. Nuclear-powered satellites and radioactive debris generated by them. By the year 2000, these satellites will send 3 tons of debris into Earth orbit.

Spatial knowledge of primary school students

1, space refers to the space outside the earth's atmosphere, the whole space outside the atmosphere. Physicists divide the atmosphere into five layers: troposphere, stratosphere, mesosphere, thermosphere and outer atmosphere.

2. About 3/4 of the atmosphere above the earth is in the troposphere, and 97% is below the stratosphere. The outer edge of the stratosphere is the highest limit for an aircraft to fly with air support.

3. The space station, also known as "space station", "orbital station" or "space station", is a manned spaceship for many astronauts to cruise, work and live for a long time. During the operation of the space station, the replacement of astronauts and the supplement of materials and equipment can be transported by manned spacecraft or space shuttle, and materials and equipment can also be transported by unmanned spacecraft.

4. The universe is a hierarchical, expanding, diverse and moving celestial system.

Planets, asteroids, comets and meteoroids all revolve around the central celestial body Sun, forming the solar system.

6. There are other planetary systems outside the solar system. About 250 billion sun-like stars and interstellar matter constitute a larger celestial system-the Milky Way. The diameter of the Milky Way is about 654.38+ million light years, and the sun is located in a spiral arm of the Milky Way, about 26,000 light years away from the center of the Milky Way.

7. There are many similar celestial systems outside the Milky Way, called extragalactic galaxies, which are usually called galaxies. At present, 1000 billion galaxies have been observed, and scientists estimate that there are at least 2 trillion galaxies in the universe.

Children's space science knowledge

Primary school students' brief understanding of space science is as follows:

Of all the planets in our solar system, only Venus and Mercury have no satellites. In our solar system, there are 176 confirmed satellites around their main planet, some of which are bigger than Mercury.

2. If the star is too close to the black hole, it will be torn by the black hole. For 20 years, a group of astronomers have been observing a star orbiting the black hole in the center of the Milky Way. At present, the star is close enough to the black hole, and there will be a "gravitational redshift", which means that with the gradual increase of the gravity of the black hole, the light of the star will lose energy.

The hottest planet in the solar system is Venus. Many people think it should be Mercury, because it is closest to the sun. However, a large number of gases in Venus' atmosphere caused the "greenhouse effect", which made the surface temperature of Venus constant at 462 degrees Celsius.

The solar system is 4.6 billion years old. To be precise, the age of the solar system is 45438+0 billion years old. Scientists predict that in about 5 billion years, our sun will swell into a red giant. In about 7.5 billion years, its enlarged surface will devour the earth.

Enceladus, the smaller satellite of Saturn, reflects 90% of the sunlight. Because its surface is covered with ice, it rarely absorbs sunlight and basically reflects it away. The surface temperature of Enceladus can reach MINUS 20 1 degree Celsius.

The moon found the female body of Chang 'e.

It can be said that the moon has now been "conquered" by mankind. Many countries have had the experience of landing on the moon. The first country to land on the moon was the United States. It is said that Apollo 20 spacecraft actually found the body of Chang 'e on the moon, and it has three eyes. Is this true or not? After the picture of Chang 'e's body on the moon was exposed, it attracted the onlookers of netizens all over the world. Let's see if this is true or not!

Chang 'e's body was found on the American moon.

According to news reports, 1976, the United States carried out the Apollo 20 moon landing program and successfully landed on the back of the moon. A huge spaceship wreck was found, and a female body was found in the wreck. The face of a woman corpse is close to that of a human being and has three eyes. So netizens combined the China folk fairy tale "the Goddess Chang'e flying to the moon" and thought that the identity of this female corpse should be "Chang 'e". I can only say that your brain hole is really too big. How can Chang 'e really exist? She only exists in myth, and it is impossible to really settle on the moon!

And the moon's three-eyed female corpse discovered by Apollo 20 definitely doesn't exist. I'll fake it for you.

The video above is the so-called video of Apollo 20 landing on the moon and finding the female body at that time. In the video, the time is clearly recorded, even the wreckage of the spacecraft and the appearance of the female corpse are clearly photographed. It can be seen that the three eyes and mouth of the female corpse are supported by a bracket. It looks a little scary, but don't be afraid, these are all fake. It's a man-made video, and the reports in it are all false!

The Goddess Chang'e flying to the moon's female corpse is a fake.

According to the introduction in the video, the moon landing plan was carried out in 1976, but according to the records, the United States never launched the Apollo 20 spacecraft on 1976. There is also the introduction of the cooperation between the United States and the Soviet Union. Do you think it's possible? At that time, the United States and the Soviet Union were in the Cold War, so it would be nice not to fight. Will the two sides work together again? Don't even think about it!

Now, the technology of that year simply can't reach the ability to "land on the back of the moon." Even the Soviet Union didn't have the scientific and technological strength to send a man to the moon. Can it still cooperate with America? Is this not a joke? Even if the United States has had the experience of landing on the moon, it is only the front of the moon, and it is completely impossible to go to the back!

Previous 0/3 Next Page

The real photos of the earth are too scary.

The real photos of the earth are too scary.

The photos of the real earth are too scary. Many people are very satisfied with the earth we live in, but with all kinds of pollution, our earth has become ugly. Next, I will take you to know the horrible photos of the real earth.

The photos of the real earth are too scary 1

Overseas media said that many people's impression of the earth is probably beautiful water blue, but in fact that photo is "PS". Recently, the Japanese meteorological satellite Sunflower 8 took a detailed image of the earth, which is the first photo showing the true color of the earth.

On February 24th, 65438 in Taiwan Province Province, the British Daily Mail reported that the meteorological satellite Sunflower 8 was launched on June 24th, 65438+1October 7th. Recently, an image was taken at a distance of 35790 kilometers from the Earth, showing the details of clouds, oceans and deserts. With super high resolution, this is the first original picture of the earth without any color modification.

Japanese satellites photographed the real face of the earth.

In the past, people's impressions of the water-blue earth came from this photo.

In the public's impression, the water-blue earth is actually a color-corrected photo taken by NASA, which is very different from the gray earth taken by Sunflower 8. However, this so-called "true color" photo does not refer to the image seen by the naked eye, but the real face of the earth in space.

"@ NASA Chinese" also published a photo of the earth without makeup, which surprised netizens. It is uneven, with one concave here and one convex there. Generally speaking, some netizens said it was like a sweet potato, some netizens said it was like a spare tire, and some netizens said it was like a pomegranate.

For this photo, astronomical experts said that the earth is really not an authentic sphere, and its appearance is a bit strange. The reason why the earth is so long is that it not only revolves around the sun, but also rotates. There is both land and water on the surface of the earth. In order to maintain the internal gravity balance, all parties grow into this strange shape under the "struggle".

In fact, scientists have always been controversial about the appearance of the earth. Newton, a British physicist, suggested that the earth can't be a right sphere, because it rotates around its own axis, but just a flat sphere with two poles compressed and equatorial uplift, like an orange. But Newton's theory met with opposition. At that time, Cassini and his son, the first director of the Paris Observatory, raised objections. They think the earth looks more like a watermelon. King Louis XIV of France sent two expeditions to measure the radian of meridian. Facts have proved that Newton's flat ball theory is correct.

Now, scientific means are developed, which opens up many ways for earth survey. Through actual measurement and analysis, accurate data are finally obtained: the average equatorial radius of the earth is 6378.38 km, and the polar radius is 6356.89 km. It is also found that the Arctic is about 18.9 meters high and the Antarctic is 24 ~ 30 meters low. It seems that the earth is shaped like a pear: its equatorial part protrudes, which is its "pear body"; The North Pole is a bit sharp, like "pear pedicle"; The South Pole is a little concave, like a "pear navel", and is called "pear-shaped earth". To be exact, the earth is a triaxial ellipsoid.

Real earth photos are too scary 2

We are always talking about finding extraterrestrial civilization and emigrating to other planets. We are always eager to emigrate to the stars. However, it is pessimistic that up to now, although more than 4000 exoplanets have been discovered, only the earth is still the only known planet with life suitable for human survival. In our stereotype, since man took the first panoramic photo of the earth by satellite 43 years ago, the earth has always been a vibrant blue planet with completely different oceans and continents.

43 years ago, when the first panoramic photo of Zhang Weixing was released in the world, people were shocked by the beauty of the earth, and we were proud of it. More than 70% of the oceans are covered by dense forests on land, which makes our earth like a fairyland, blue and green, colorful and well-defined. Since then, this beautiful image has been engraved in our minds, lingering. Forty-three years have passed, and our earth has not changed at all. Is it really still that beautiful?

In 43 years, the earth has changed. You may not believe it. The earth has changed in less than half a century. It has lost its beauty, even beyond recognition. Yes, the earth has become ugly now, and its appearance has been destroyed by human beings. You may not believe it, but it's true.

Due to the different social division of labor, for most people, there is actually no chance to go directly into space to see the true face of the earth, and even the original photos taken from space at first hand have no chance to see it. All we can see is processed information, and the photos released about the panoramic view of the earth are all processed by technology, which makes many people feel that the earth has not changed for so many years, which will make us feel that the earth is still beautiful.

Yes, the earth is beautiful, but that was in 1978, when humans photographed the earth. It's really beautiful, with a clean atmosphere and a vast blue ocean. At that time, the damage caused by human beings to the earth was really small, and there was almost no impact. At that time, the earth had enough ability to digest and deal with environmental problems caused by human beings, but now it has changed, and our destructive power has exceeded the capacity of nature.

In recent years, with the development of human society, we have indeed paid a huge price. Looking at the earth from space, the ocean is not so blue, the land is not so green, the atmosphere is not so normal, and the earth is a little grayish brown.

This is just the interior of the earth. Do you know that outer space is not pure land? In recent years, with the increasing dependence of mankind on artificial satellites, a large number of spacecraft have flown into space and successfully put into normal use, and failed or failed to become space junk. So it is conceivable that our earth has a layer of high-speed garbage. The space environment is inherently dangerous and complicated, especially after there is so much man-made space garbage, the earth is even more dangerous. In particular, we are almost helpless about space junk, and there is no way to recycle it, so "space junk" will only increase.

There are more than 200 countries and regimes in this world, and everyone has complicated relations and interests, but we should remember that the earth is our home. Before we have the ability to create a new star, we should protect it well, because it is the foundation of all of us. We should keep the ocean blue, the sky clean and the earth evergreen. We should not give up environmental protection completely for the sake of economic development, because we must suffer in the end.

Our earth belongs to us, but it belongs to those descendants after all, so do you think we should protect it in time in the face of the deteriorating earth environment?

Real earth photos are too scary 3

1. Today there are 7.38 billion people in the world. With the continuous growth, it is estimated that the global population will exceed 1000 billion in 2056! This picture shows the current situation of overpopulation in Mexico City. It is the result of more than 20 million people living in a city!

2. Because of the demand for animal products, there are many illegal hunting incidents in Africa every day. Elephants and rhinos are slaughtered in various cruel ways to meet the illegal animal products market of ivory and rhinoceros horn!

Every two seconds, a forest the size of a football field disappears. The main reason is the forest fire!

There are many tracks left by airplanes in the sky of London.

A giant truck carrying oil sands will send the oil sands to be processed, which is regarded as one of the important energy sources in the future world.

6. The oil sands in Alberta, Canada left a devastated surface.

7. A shepherd in Inner Mongolia can't stand the stench of the polluted Yellow River.

8. A landfill in Bangladesh.

9. Extreme climate causes frequent wildfires in Colorado, USA, and forest fires cause serious casualties and economic losses to the world every year.

10, the night view of Los Angeles looks beautiful, but the price behind beauty is endless energy demand.

1 1. In Oregon, the Millennium forest was razed to the ground just to build a new dam.

12. In order to grow crops that are not suitable for the local climate, the Spanish almeria has built endless greenhouse farmland, in order to let local residents eat the food they want.

13, Russia once discovered the largest diamond mining area in the world, but after mining, it also left Russia with the largest abandoned mine pit in the world.

14, photographer ChrisJordan found albatross bodies everywhere in Midway Island. The belly of the dead albatross is stuffed with a lot of plastic garbage. Ironically, Midway Island is the farthest island from the land in the world, which proves that the garbage made by human beings every day is ubiquitous and harmful!

15, facing the same overpopulation problem as Mexico City, New Delhi, India has a population of more than 22 million. Looking at pictures in the air will definitely make people with intensive phobia bow their heads!

16. The Maldives, a paradise on earth, will be submerged by seawater in this century under the threat of rising sea level.

17. Tens of thousands of tons of e-waste are transported to third world countries every day. Toxic substances in electronic parts not only squeeze the local people, but also seriously endanger the health of the local people!

18, Canada's virgin forests are also being cut down and burned day by day!

19, Nevada, USA, used for stacking waste tires.

20. The disappearance of Arctic ice makes polar bears lose the platform for hunting seals. Polar bears who can't find food can only eat their cubs to satisfy their hunger and finally starve themselves to death.

2 1. The oil fields in California, USA were ruthlessly exploited by human beings until they dried up completely!

22. Glaciers in the Arctic and Antarctic are melting at an alarming rate every day. The disappearance of the ice layer reduces the ability to reflect sunlight, and the seawater absorbs sunlight and heats up to accelerate the melting of the ice edge!

23. It is an undeniable fact that burning fossil fuels aggravates global warming and leads to climate change.

There is an old Indian proverb that says very well, "Only after cutting down the last tree, catching the last fish and polluting the last river will we understand that money can't be used to eat"!