How to explain that space travel can prolong life?

You understand correctly, speed is relative. Einstein said that it was originally an observation effect, but then everyone was confused and thought it was true.

References to encyclopedia entries: Relativity, Principle of Invariance of the Speed of Light, Superphoton, Time Process, Lorentz Coordinate Transformation, Clock-Slow Effect, Inverse Relativity, Geminion Paradox, Speed Effect, Faster-than-Light, Lorentz Transform, Ultimate Velocity, Special Relativity, Time Tunnel, Geminion Paradox, Space Bending, Bending Space-Time, Light Bending.

Your understanding has been wrong: If two objects compare their velocities, they must use the same frame of reference to determine their velocity.

And then there's the fact that the Earth is moving at high speed, and the spaceship is increasing its speed on top of the Earth's speed, so there's also the speed of the spacecraft, and the speed of the spacecraft is slow.

The theory of relativity is originally a very abstract thing, and I learned a little bit in college, and it is a headache just to transform this and that. In fact, the so-called longevity extension is all made by people, I have watched TV before saying that if a person is born on a spaceship, assuming that he can live to be 80 years old and travel in the universe all his life, then he can earn seconds (a few zeros after the decimal point are forgotten). To be honest, drinking a pack of Sanlu milk powder, this life will be in vain.

So, this kind of very theoretical thing, the actual value tends to zero.

The first floor is so long, physicist, admire!

I just want to express my own opinion, I think it is meaningless to use the two sides of the comparison as a reference object, we should use the space as a reference, if the speed of the spacecraft relative to the space is faster than the speed of the earth's movement relative to the space, the time on the spacecraft is slower than the time on the earth. If a person is still in relation to the universe, his time passes the fastest.

Also, the slowdown of time is relatively speaking, and you can't feel it, that is, your year is compared to other people's two years, but you yourself feel that only one year has passed.

Banmen got an axe.

This is based on Einstein's theory of relativity. Special relativity can explain many things, such as the problem that the experimental half-life of high-speed particles deviates greatly from the theoretical value, but it will produce problems such as the twin paradox, so there is the emergence of general relativity.

It is easy to understand that one of the basic principles is the principle of the invariance of the speed of light, that is, no matter what the speed of the object is, the speed of the object to measure light is c, and it is impossible for the same beam of light to reach the same position at two times due to the problem of the reference frame. Therefore, it can be assumed that the space before the high-speed object is shortened, or the time is slowed down, so that the principle of invariance of the speed of light can be satisfied, and many physical phenomena in the high-speed state can be explained.

At present, astronautics is not possible, but it will be possible in the future. Let's take a look at the content of the theory of relativityThe theory of relativity is a basic theory about space-time and gravity, mainly founded by Albert Einstein, and is divided into special relativity (special relativity) and general relativity (general relativity). The basic assumptions of the theory of relativity are the principle of invariance of the speed of light, the principle of relativity, and the principle of equivalence.

The theory of relativity and quantum mechanics are the two fundamental pillars of modern physics. Classical mechanics, which laid the foundation of classical physics, is not suitable for objects moving at high speed and objects under microscopic conditions. The theory of relativity solves the problem of high-speed motion; Quantum mechanics solves problems under microscopic subatomic conditions.

The theory of relativity has greatly changed mankind's "common sense" concept of the universe and nature, and has put forward new concepts such as "simultaneous relativity", "four-dimensional space-time" and "curved space".

Fundamentals of special relativity.

Matter moves eternally in interaction, there is no matter that does not move, and there is no motion without matter, because matter moves in interconnectedness and interaction, therefore, motion must be described in the interrelationship of matter, and it is impossible to describe motion in isolation. That is, there must be a reference object for motion, and this reference object is the frame of reference.

According to the principle of special relativity, inertial frames are completely equivalent, therefore, in the same inertial frame, there is a unified time, which is called simultaneity, and the theory of relativity proves that in different inertial frames, there is no unified simultaneity, that is, two events (space-time points) are simultaneous in one relational frame, and they may be different in another inertial frame, which is the relativity of simultaneity, in the inertial frame, the time course of the same physical process is exactly the same, if the same physical process is used to measure time, Uniform time can be obtained throughout the inertial frame. In the future general theory of relativity, it can be known that in non-inertial frames, space-time is inhomogeneous, that is, in the same non-inertial frame, there is no unified time, so a unified simultaneity cannot be established.

The theory of relativity derives the relationship between the time schedules of different inertial frames, and finds that the time progress of the moving inertial frames is slow, which is the so-called clock-slow effect. It can be understood colloquially that a moving clock moves slower than a stationary clock, and the faster it moves, the slower it goes, and when it approaches the speed of light, the clock almost stops.

In fact, there is no such statement, because Einstein's theory of relativity has not been thoroughly studied so far.

In fact, the opposite is true. The theory of relativity helps to enable interstellar travel. At least within the range of human life expectancy.

No, human beings have been making progress, and one day they will enter the universe.

It's quite possible, it's just that we're not very mature in terms of technology right now.

I still don't know much about this, I don't know that much about this aspect.

So far, Einstein's theory of relativity has not been thoroughly studied.

No, human beings are not online, as long as we keep moving forward, we will not stand still.

No, after all, no one can understand the theory of relativity now.

It is precisely because of the theory of relativity that it is possible to travel, but not until the speed of light is exceeded.

The theory of relativity is very advanced, but it is not yet fully grasped.

A boring but esoteric question that I thought about at a very young age, what is beyond the earth? After watching the documentary, I suddenly had some new insights.

It can be simple or complex to understand, as it says at the end, "This is the end of the journey, but it is also the beginning of the journey".

To put it simply, you compare the entire universe to a speck of dust, and then infinitely magnify to the limit you can imagine, such as a stone and then an earth,......Then the edge of the universe is the particle of dust in the previous metaphor (this grain of dust represents a cosmic pole mass point that we know in the film) infinitely magnified to the extent that you can know. This is just a one-way understanding from A to B, and I believe many friends should still understand this.

As for the more complex understanding, my understanding is also limited, so I would like to briefly talk about my own understanding, and please discuss it more. My point is that there is a basic concept that needs to be explained, that is, I do not support that the initial formation of the universe was based on the big **, and if this argument can be formed, then what was before the big **? I think the whole universe is like a perpetual motion machine, a complex process with no beginning and no end, an infinite cycle.

A few simple sentences can't express my point of view, but because our human knowledge level (that is, there are too many things that cannot be explained clearly) is limited, so this is a mystery that we can never solve. It is both the end and the starting point. Intelligent beings who are more advanced than us may have a better understanding of the universe than we do, so I would like to summarize my point of view with a familiar phrase, color is emptiness, and emptiness is color.

This is the highest state of Buddhist thought) I don't believe in any religion, but I think that Buddhism has relatively high philosophical attainments.

Not contradictory, the problem of time travel, suppose that back to 400 million years ago, first, we saw the starry sky at night completely different from now, second, the earth rotated faster than now, and the moon was closer to us; Thirdly, the closest star to us may not be Proxima Centauri, maybe more stars are closer to our Sun, the third Andromeda galaxy is much closer to us, and fourth, the universe is smaller than it is now.

Space travel is okay, space folding is hard. Because space folding requires a huge amount of energy, it cannot be achieved in the short term.

One day, I finished my homework and started drawing.

The theme of this painting is "Space Tourism", which shows a team of space tourists traveling to space in a spaceship. Travelers flew away from the Earth and saw planets such as the Moon, Mars, Jupiter, Saturn, Venus, Uranus, and Neptune in space. Finally, I saw some unknown planets of all kinds.

Tourists are lamenting how amazing space is.

They were so engrossed that they forgot the time to return to Earth. The spacecraft ran out of fuel, and when the fuel was about to run out, the spacecraft sounded the alarm, and the pilot immediately told the tourists to quickly fasten their seat belts and get ready, and the spacecraft should rush towards the earth, and then the spacecraft will sail towards the earth like an arrow from the string. Only five percent of the fuel is left when it reaches Earth.

It's dangerous! Finally returned to Earth safely.

I was so involved in painting that I felt like I had gone to space. When I grow up, I will definitely go to space and see it myself.