Doubts about space travel in relation to 2012?

Hawking is often a big talker, and he often bets with others on physics issues, but unfortunately he always loses more and wins less, which is also famous. Personally, I don't think the Mayans' predictions made more than a thousand years ago are credible, after all, the world has changed a lot, and the prophecies are based on the background of time and space, and the future is in constant motion. Something big may happen in 2012, but it won't be the end of the world.

The earth has been fine for 65 million years, so why is it just in time for the end of the world in our generation - didn't I cultivate enough in my previous life? Someone once said that '98 was the end of the world, and nothing happened in the end, except for the floods.

In the second half, the time machine is not a means of interstellar travel, but a means of time travel. The returnee paradox is indeed a big problem, after all, time in the future can be infinite, and if the people of the future can really travel time, you think about it, the streets are not crowded with future archaeologists and historians. So, I think maybe a time machine doesn't allow you to go back in time, just see the past.

However, the wormhole theory does support the feasibility of time travel. Then there may be another possibility, that is, all the measures to go back to the past and change history happen on other timelines, in parallel universes, you can't perceive this world, that is, the MWI theory. The possibility of human extinction is indeed to be considered, but it is more likely that the time machine will not allow humanity to return to the past.

After all, you will probably have nothing to do with our current universe for the rest of your life, so why worry about things that far away.

Rumors about aliens have always existed, and we ordinary people are powerless to verify them, so we can only choose whether to believe it or not. However, it should not be accidental that there are so many rumors, and it is also very possible that there are aliens on Earth. However, imagine if you traveled back in time to ancient times, would you rush to take out all kinds of modern equipment and fiddle with it?

In the same way, as long as the alien has some quality, he should not appear or interfere with the earthlings now, so that we can develop naturally, at least until we have interstellar communication and astronautical capabilities. Even if the authorities negotiate with the aliens, can they announce it to the public? People don't know how to react, it is likely to cause panic and even distrust of **.

All of the above is a personal opinion, well. Just a little thought.

For example, in history, the son said on the river: The deceased is like Sihu.

The son put it on that one and said.

And, who has been. sub".

There are indeed countries with aliens underground, who can travel freely between the Earth and the stars and the Moon. There will be many catastrophes in 2012, supernatural forces will save the good guys, weed out the atheists, and it is recommended to look for the 9-character amulet. Not all life will be eliminated, just purify and sublimate life, not so terrible,

There are so many things that I don't find difficult when I take the first step. I wanted to feel the travel of a person, but I was afraid of the loneliness of a person, and hesitated for a long time, but I still took the first step bravely. Embark on the journey, all the way south, to see if the city I love is what I expected. Wait for me.

Yes. Mathematically, a dimension can be represented by a number, such as a number line; The two-dimensional is represented by a pair of numbers, which is the two-dimensional coordinates, and the three-dimensional is represented by three numbers, such as (x, y, z) is the three-dimensional coordinates.

There are only three dimensions that we commonly see, straight line, flat and three-dimensional. But a scientist's theory on a science program suggests that seven dimensions are needed to support it. That is, there are seven dimensions of physical space.

Four dimensions are mathematically easy to implement, just represent a point with four numbers (a, b, c, d), but what does it actually mean? Some people think that the fourth dimension is added"Time"axis, which represents the fourth dimension in terms of time.

Personally, I think so (just conjecture):

Dimensions are provided to us"Through"The method of objects, one dimension is a straight line, if the world is one-dimensional, then no two objects can pass through each other; Two-dimensional allows us to"Winding"over other objects, from each other's"above"or"below"Bypass it; Three-dimensional is the same, providing a from"Depth"on the way around the object.

But what is a bypass? What's not bypassed? You have to cross the street, if you pass before the car arrives"Bypass"Now, if the car hits you, you probably haven't bypassed:

p Actually, there is a time to participate at this time, if you are in the same place on the road at the same time as the car, you will collide; If you and the car are in the same place on the road at different times, you won't collide and you'll get around each other safely, and you might find the meaning of the fourth dimension of time in this conclusion

The x-dimension is not the space that can be formed with x lines.

The bigger the x, the more thoroughly you can see the object...

First of all, I believe that even if you put this issue under this category, you and I both believe in the difference between science fiction and reality;

Next, let's talk about my logical understanding, the essence of your two questions is one question, so I will directly answer the second one, there are countless you exist in countless parallel time and space, and only one of them is crossed, called the time-traveler, what you see is not you in the time and space where the time-traveler is located, and everything you do in this space-time and space will not affect everything in the time and space where the time-traveler is located, including the time-traveler, then you will not see you in other time and space, and there will be n encounters in the same space-time;

In fact, it is not difficult to see that even if you can travel through it, you can't actually do anything (for your original time and space), and the fact is that what we see with our naked eyes is the past, which can be regarded as a kind of time-travel, but we can't change the past

First question. Since A1 is able to travel to the past, it means that A2 did not kill himself in the past, and therefore, it is impossible for A2 to kill himself.

The second question ... In a few decades... Go down and ask Einstein.

The world is more than just a space! If you want to cross, you have to open another 'door'! And a key! Now we only know that we want to enter this door, but we don't know where it is, and we can't find the key! How do I get in?

Hungry, this also appeared in Harry Potter, which is the time turner in the third part. Of course, Hermione told her not to let her past self see it, otherwise there would be no future. There is also an assumption in the movie that people can travel through time and space, but they can't be felt by people in the past, and I don't know if this is the answer to this question.

Considering the case of special relativity, let the coordinates (t,x,y,z) of event A and event B in the Earth's inertial frame of reference be: (0,0,0,0),(t,vt,0,0)then their invariant four-dimensional interval is:

s 2=(ct2-ct1) 2-(x2-x1) 2-(y2-y1) 2-(z2-z1) 2=(ct) 2-(vt) 2, the modulus size is the same in any frame of reference, i.e., s 2=s'^2=(ct2'-ct1')^2-(x'2-x'1)^2-(y'2-y'1)^2-(z'2-z'1)^2。

When the signal correlates to the velocity (here it is equal to the velocity of the rocket v0), the law of cause and effect is satisfied, and according to the time of all observers, they all agree that event A precedes event B;

When the signal correlates with the velocity (here assuming the velocity of the spacecraft) v>c, then the four-dimensional interval s of the two events is a quasi-space separation (s 2<0), which does not satisfy the causal law, and there is no causal relationship between the two events, so the views of observers of different velocities about what is before and after event a and event b may contradict each other.

The relativity of this measurement of space-time revealed by the theory of relativity is based on the principle that the laws of physics are exactly the same for observers moving at different speeds.

A Brief History of Time - Wormholes and Time Travel is discussed on the basis of general relativity. Because the general theory of relativity believes that the existence of matter produces a gravitational field that bends space-time, it is possible that some areas of space-time are extremely curved and connected with other space-time regions, thus forming space-time wormholes, realizing the cross-travel of time and space, rather than reaching through external continuous space-time - because it may not be possible to reach it, for example, it is difficult to go back to the past, while space-time wormholes may lead to a certain place in the past. You can think of space-time as a surface, make a small hole in one part of the surface, and make it lead to another part of the surface, and imagine that it is a space-time wormhole.

The theory of relativity of the masters, that is, the people on the spaceship will think that the centaur will open it after the meeting, but in fact it will be opened first.

In this case, if you travel faster than light, you will go back in time, so the sequence of events will change. A change in a frame of reference does not affect the laws of physics of its own frame of reference, but it does change in a relative state.

Don't deny anything lightly, it only means that you know too little, the earth is just a small existence in the universe, and human beings are even more insignificant, and a positive vision does not prevent disaster!

To look at destruction from another perspective is to purify the existence of human beings that upsets the balance of the natural world, and that the end is inevitable, even if not 2012

Just like people never know how far they will live, no scientist can be accurate before the disaster comes**, human beings have an origin and must perish, sooner or later, everyone says they don't believe it just don't want to believe that this day has come so early! This is my attitude on whether the end of the world is real or not!

As for what you think, of course there is, in fact, I personally think that the essential difference between living for another two years and living for another fifty years is to eat less food, less stress and troubles, and the so-called insignificant happiness compared to the pain that people live to bear, some people have said that the longer people live, the more afraid of death, maybe when we live to the age of eighty, we don't want to die than now, anyway, in the end, that small box is our permanent home, see nothing, if it is not for the family, I think it is better to die than to live, There is not so much pain anymore, in fact, 2012 is in people's hearts, not necessarily at that time, because of unequal treatment and vastly different lives, people cry out from the heart. Because only 2012 can be realized, 2012 is the expectation of equality.

Not only the Maya, but also the Chinese sacred book Tui Bei Tu also says that "Qiankun reinvents in Jiaoyi" Jiaoqi refers to the Year of the Dragon, and 2012 is the Year of the Dragon. As for Qiankun reconstruction, I personally understand 1. It should be that the Earth's magnetic force is reversed.

2。It may be that the current civilization is destroyed and mankind enters a new civilization. Reengineering, everything starts from scratch.

I'm looking forward to seeing it with the people I love and welcoming 2012 together

How can there be any 2012, this kind of lie is believed?! Brother, can you be sunny in your heart?

In 2012, even scientists don't dare to completely deny it! If it comes, it will only be possible to accept death.

Come on, this filthy world, destroy it or not (ps: the end of the world is December 21, 2012).

(The Qinghai-Tibet Plateau is uninhabited).

Q326312399, a few logs about 2012, will definitely solve the doubts ......

Nanshan Guanyin is not qualified, the ticket is going to be 150 or 158, and some of the temples have to charge money, and then because there are many scenic spots, it is troublesome to do sightseeing cars. People on the hot car are reluctant to come down to see the sights. So although the car is not small, there is no vacancy for you to sit.

On a hot day. The innermost Nanshan Guanyin actually has to charge 108 yuan = = very excessive. I didn't go in.

Looked outside.

The hot spring seems to be better than Nantian Hot Spring, and we went to the Pastoral Small Fish Hot Spring. It's not particularly good, anyway. There is a layer of dirt on the free fruit plate inside.

You can dial it down by hand. But that little fish's hot spring is very good, and it really helps you peck it clean, and if you salt it, be careful of the wounds on your body. My relatives just forgot about it and went in and died.

There are many types of Nantian hot springs

At the end of the world, the driver said that he was an official who didn't stay.,Don't stay to do business.,Because it used to be a place of exile, it doesn't seem to be very lucky.。。 I don't know.. But I've heard that there are only two big rocks. I didn't go.

I went to Wuzhizhou Island a long time ago, about six years ago, and the water was really clear!! Very clean!! Biaron Bay is much cleaner!

It's really crystal clear! But I heard the driver say that in order to build a hotel, it was filled in quite a lot. I don't know if it's still like that.

It's a pity.

We looked at the seafood market in Sanya City recommended on the Internet to eat, 6 rows of 8 seats, the taste of the fire is quite good, the stall is very arrogant... It is written "Recommended meals by netizens", and I found it as soon as I looked for it.