Space junk is fast, why can they move without power?

Don't underestimate this space junk,Due to their extremely fast flight speed (6-7 kilometers per second), they both contain huge lethality, and a 10-gram piece of space junk crashes into a satellite, which is equivalent to two cars colliding head-on at a speed of 100 kilometers per hour - the satellite will be penetrated or destroyed in an instant! In the history of astronautics, space junk has caused a number of accidents. Although the consequences are not serious, they have attracted great attention.

andWhen people enter space, the distance from the earth will become larger, and the distance from other celestial bodies will be closer, by the formula of gravitational force you will find that because the distance between people and other celestial bodies and between people and the earth will not be too far apart, so the force of each celestial body is roughly equal, in the case of no external force, people will float, and space junk is the same.

In 1983, the space shuttle Challenger collided with a millimeter-diameter piece of paint shards, causing a scratch on the porthole and forcing it to return to Earth early. In 1986, shortly after the European Space Agency's Ariane rocket entered orbit, 564 pieces of wreckage about 10 centimeters in size and 2,300 pieces of small fragments were formed. This garbage later directly caused the failure of two Japanese communication satellites.

On September 15, 1991, the distance between the U.S. space shuttle Discovery and the wreckage of a Soviet rocket was only a kilometer. To avoid a possible collision, the ground command system warned the shuttle to distance itself from the wreckage.

Space junk travels at a speed of 6 to 7 km/s in space, and spacecraft are also moving at high speeds, with relative velocities of up to 10 km/s. Therefore, a small piece of space junk is enough to cause huge damage to an artificial satellite or manned spacecraft. A 10-gram piece of space junk collides with an artificial satellite, and the satellite is punctured or destroyed in an instant.

If it hits a manned spacecraft, the consequences are even more unimaginable.

Because they are in space, they move even when they are not motivated, and they are very fast.

They are also related after there is no motivation, so they can exercise.

Because they have no resistance in space, it is perfectly possible.

Because there are other forces in the universe. It can give people a different feeling.

Because there is no gravity in space, and there is no gravitational force and no gravity

They don't have power, but they don't have resistance, and they don't have gravity!

Because there is no gravity and no gravity in space, even people can fly on it.

Because there are also some very strong magnetic fields in space. So you can hold up this space junk.

Because probably space junk movement doesn't need a medium, and it doesn't need something to help them move, and there is no gravitational and gravitational pull.

Space has no gravitational pull, it can float on its own, and it can also move.

There are several reasons why spacewalks are slow, starting with astronauts wearing bulky spacesuits while walking in space. Such clothes are very heavy in order to provide oxygen and other living systems, and although they are weightless in space, it is also very inconvenient to walk in such clothes. In addition, you should always pay attention to safety during spacewalks and do not leave the spacecraft, otherwise it will be difficult to return to the spacecraft, which will cause great danger.

People walk on the earth about one meter per second, and if they are ten meters away, they will not be able to walk for ten seconds.

For walking in space, a distance of 10 meters takes 20 minutes, which seems slow but is already a very fast speed.

Due to the particularly harsh environment in space, you must wear a cabin suit when you leave the cabin, weighing up to 130 kilograms, which is particularly bloated on the body, which also restricts the movement of astronauts.

A spacewalk is not as easy as one might think, and it is different from walking on Earth. It is not like walking on two feet on Earth, and the walking of astronauts cannot be called walking in the strict sense, but only a relative movement of the body.

It took seven hours for our astronauts to walk out of the capsule, while it took 12 hours for American astronauts, which is still much faster than the speed of the United States.

There are three technical difficulties in spacewalking: first, there is no way out of space; Second, astronauts cannot walk on their legs in a weightless state, mainly by hand; Third, the extravehicular environment is very harsh, and it is necessary to use a complex and reliable out-of-cabin activity system to overcome the impact of the space environment.

In addition, the movement and operation rules of the human body when walking in space are completely different from those on the ground and in the cabin, so the most important thing to master the movement and control technology in space is to keep the astronaut in a certain position in weightlessness. Hold on to some objects around you with your handlebars. Therefore, the muscle strength and endurance of astronauts' hands, wrists and arms are very important, which requires astronauts to strengthen the exercise of hands, wrists and arms before flying.

Some handrails are installed inside and outside the spacecraft, and astronauts can move their bodies back and forth with hand-held handrails one by one.

In fact, astronauts spend most of their time moving from one working position to another during a spacewalk, so how to effectively move their bodies during a spacewalk is a very important technique.

Walking in space is very slow, because there is no gravitational pull of the earth in space, and there is no external force, so people will be suspended in mid-air, and they need to control their balance with their own strength, and walking in space will make the speed very slow.

In space, there is a vacuum, and then people have no gravitational force, and all actions have to be done by traction. Therefore, when it comes to a lot of things, the actions are very uncoordinated, and there are a lot of things to overcome.

Space is in a vacuum, there is no protection of the atmosphere, the temperature varies greatly, the temperature can be higher than 100 when the sun is irradiated, and the temperature can be lower than -200 when there is no sunlight, and there are various radiation that can harm the human body. In order to ensure that astronauts can complete their tasks safely, healthily and effectively during out-of-cabin activities, it is necessary to have spacesuits, maneuvering devices for astronauts to ride outside the capsule, tools needed to complete the mission, equipment to fix astronauts' bodies, safety belts and other equipment. The extravehicular spacesuit is the most important equipment in the out-of-cabin activity, which is equivalent to a miniature spacecraft.

It isolates the astronaut's body from the harsh environment of space and provides the astronaut with various conditions necessary to sustain life, such as atmospheric pressure and oxygen.

Because the artificial air pressure and air composition in the closed cabins of manned spacecraft such as spacecraft, space stations, and space shuttles are basically the same as those on the ground, astronauts absorb a certain amount of nitrogen in their bodies. The air pressure inside the spacesuit is lower and is only atmospheric. If the astronaut suddenly leaves the capsule, the blood will not be able to meet the low air pressure, and the nitrogen dissolved in the adipose tissue will be free and form bubbles because it cannot be brought to the lungs through the blood and discharged, which may cause air clots to block the blood vessels and cause serious diseases.

Therefore, astronauts need to absorb pure oxygen to discharge nitrogen from their bodies before leaving the capsule to eliminate hidden dangers.

Astronauts walking in space are unable to distinguish the size of objects from near and far, nor can they judge their speed, and if there are no insurance measures, they can easily get lost in the vast space and become human satellites. So spacewalks need to be taken with insurance measures - connecting the astronaut to the spacecraft with a seat belt to prevent the astronaut from getting lost in space.

Some people think that a "spacewalk" is an astronaut walking in space, but in fact, a spacewalk is completely different from people walking on the ground. Because there is no sidewalk in space, and there is no road, there is nowhere to go; Moreover, astronauts are weightless in space, floating around and unable to walk. Astronauts move their bodies by hand, robotic arm or manned maneuvering device, not by foot.

In order to facilitate the movement of astronauts, the designers installed some handrails inside and outside the spacecraft, and astronauts can use their hands to hold the handrails to move their bodies back and forth. Therefore, "spacewalk" is just a colloquial name, and strictly speaking, it should be called "out-of-cabin activity".

It is a matter of physics that people walk slowly in space. Specifically, it is a matter of gravity and friction.

The ability of people to move quickly on the ground stems from friction. Because there is static friction between the human foot and the ground, when the foot gives a certain backward force to the ground, the ground gives a reaction force, so that the person moves forward. The greater the force that a person gives to the ground, the stronger the reaction force and the faster the forward speed.

And in space it is weightless. In a microgravity environment, it is difficult to generate static friction. In this case, it is difficult to generate backward force between the human foot and the outer bulkhead of the spacecraft to which the foot is attached. And once forced, it is likely to eject the astronaut far away.

In this case, neither force nor force can be left unused. This needs to be mastered with caution and care. As a result, astronauts are extremely slow and difficult to walk in space.

Walking in space is slow because in space, there is no gravitational pull on the Earth. There is no gravity, no friction, no resistance, and people are like floating in the air, so every action needs to be reacted by force to be able to move.

The spacewalk is very slow because the astronauts are wearing heavy spacesuits. The spacesuit is heavy and bulky. In itself, it will cause the astronaut to move very inconveniently, resulting in slow movement, including walking speed.

In addition to the factor of spacesuit, weightlessness in space will also lead to slow action. In addition, the out-of-cabin activity itself is a very dangerous operation, so caution must be taken. The walking speed should not be too fast.

In fact, correspondingly speaking, the main thing is that the speed of walking in space is slow, that is, the gravitational pull of space, that is to say, at this time, your body is not touching the ground, but suspended in the air, so correspondingly speaking, even if you take a step, its resistance is very large, and correspondingly, various functions in your body will undergo various changes, so in general, you need to use the space belly, and relatively speaking, the temperature in space is generally It is about 70 degrees to 150 degrees below zero, so it is relatively necessary to have a space step to keep warm, and relatively speaking, there are some safety measures in this state of suspension, so at this time, it is not very safe to walk in space, and the speed is generally very slow.

The gravitational pull of the earth in space is very small, and there will be no point of focus when walking, just like a person swimming in water, and he cannot walk fast in the water.

The speed of spacewalking is slow because people do not rely on objects in space, and there is no gravitational pull of the earth, and the space station is in high-speed motion, and the spacewalking distance is also very short, just walking on space station equipment.

That's because the human body is in a state of weightlessness, there is no ground friction, and in space, there is no strength, there is no air, astronauts have to wear a lot of equipment, and the body is also very heavy, so it feels very difficult to walk, hopefully, thank you!

Because it is a vacuum in space, and there is no attraction, it is very slow to walk because it has no effect of gravity.

Because space is a vacuum, there is no gravity. Astronauts wear extravehicular spacesuits and need to use trim technology to keep themselves centered and levitate at specific angles and postures.

Astronauts are out of space, commonly known as spacewalks. Spacewalks, astronauts' round-trip between space and earth, and spacecraft rendezvous and docking are the three basic technologies of manned spaceflight. Assembling spacecraft in orbit and carrying out space maintenance work are all done by astronaut spacewalks.

However, spacewalking is a very difficult and demanding job, and astronauts must wear bulky extravehicular spacesuits and complete various delicate operations while their bodies are floating. Carrying out various space operations in weightlessness is very different from the situation on the ground, and astronauts must master complex and new weightless operation skills.

The speed of spacewalking is very slow because in spacewalking, the human foot lacks a point of focus, so it feels like there is no way to exert force. On Earth, people will have enough adhesion when they step on the ground, so they will walk much faster than in space.

Because space air is scarce. It is very inconvenient for people to walk when they are walking. Walk completely on your own power. You can't walk if you want to. That's why spacewalks are slow.

Because there is no attraction in space, the gravitational attraction is small, and there is no thin air, and when walking, it is completely dependent on its own power to walk, so it is not fast and walks very slowly.

Because there is no wind in space, there is no mass, so there is no resistance in the regression, that is, there is no power, in this case, if you want to run with the help of your own power, the speed, either very fast, or the speed will be very slow, so the speed of people going down in weightlessness will be relatively slow, otherwise the speed will be very fast, and it will not work, which is not conducive to spacewalking.