Guys usually like to talk about world wars, spaceships inside the moon and Mars, but what about girl

The gravitational pull of Mars is 3 8 times that of the Earth

The gravitational pull of the Moon is 1 6 of the Earth

In comparison, the gravitational pull of Mars is greater than that of the Moon, so the spacecraft needs more kinetic energy when it is away from the star.

Mars has a diameter of 6,790 km and the Moon is 3,473 km. It can be seen that Mars is much larger than the Moon, and the greater the mass, the greater the gravitational pull. Therefore, the spacecraft needs a lot of kinetic energy when it is away from the star.

1. To fly to the moon, the speed is about kilometers per second, and you don't need to reach the second cosmic velocity, because the moon is still within the gravitational range of the earth.

2. The speed of going to Mars and leaving the vicinity of the Earth must reach or exceed the second cosmic velocity, because to get rid of the gravitational pull of the Earth, the Mars must reach more than the second cosmic velocity.

3. China has not yet launched a rocket with a second cosmic speed, so it has no experience, and the rocket needs more fuel than ordinary satellites, so it requires greater rocket thrust.

4. There is no resistance in space, and when the spacecraft goes to Mars gets rid of the earth's gravity, it can enter the Earth-fire orbit hyperbola and fly to Mars until the gravitational pull of Mars accelerates.

5. In space, the transmission of signals is much better than that on Earth, and there is little interference, so signal transmission is not a problem, unless it is blocked by celestial bodies, such as when Mars and Earth are on one side of the Sun, the Sun will block the signal, and the signal cannot be transmitted at this time.

Generally speaking, if you want to send a spacecraft to the moon, at least you have to achieve it, which is still a theoretical speed, and in practice it will be greater. At present, the carrying capacity of domestic low-earth orbit is only 10 tons, which is not enough to send to the moon and Mars. In addition, the cosmic drag is indeed very small, but the gravitational force in each planet is still there, and it is precisely because there is no resistance that the gravitational force is very large.

So the rocket must have a large carrying capacity. As for why other countries have the ability, first, they started their aerospace technology earlier, and second, they have a lot of money and are not afraid to burn money ......As for the reason for the loss of contact, that is generally impossible, because the power of the spacecraft antenna is very large, after all, the Voyager is about to fly out of the solar system, and there is no loss of contact.

Now China's rocket thrust is not enough, to send spacecraft to Mars, the need for a larger thrust rocket (of course, this rocket is under development, because the future space station to use) lunar spacecraft can, but to send people to the moon is not good, as for Mars, it is even worse, but the construction of spacecraft to Mars has no technical difficulties, only one problem, funds, the current stage of technology, the entire cost of going to Mars is huge, even the United States can not afford it! Either international cooperation or the advent of more advanced space technology to reduce the cost to a level that one country can afford, the journey to Mars will be possible!

There is no air in the universe, there is no friction, so the spacecraft does not need to accelerate all the time, and after reaching a certain speed, the rocket engine can be turned off, just rely on inertia, because there is no friction, so the deceleration also depends on the rocket to slow down, how much fuel is used to accelerate at the beginning, how much fuel is used to slow down! Go to the moon can be launched directly on the earth with a rocket to the moon (you can refer to the Apollo program of the United States to the moon) to go to Mars is not good, at this stage a spacecraft to Mars is not able to be launched into space by a rocket at one time, to make the spacecraft into multiple parts like a space station, respectively launched into the earth orbit with a rocket and assembled!

The temperature during the day is about a hundred and a few degrees to three hundred and thirty degrees, and at night the temperature is minus 150 degrees to minus 170 degrees. Moon.

Temperatures can reach 20 during the day and drop to 80 at night. Mars.

Both the Moon and Mars have a small amount of water.

The oxygen content of the Moon is less. Mars is.

The surface of the moon is not surrounded by an atmosphere, so it does not contain oxygen.

At present, it cannot survive, because the Moon and Mars are planets that do not have a basic living environment, such as water, sunlight, etc.

Because there is too much carbon dioxide on the Moon and Mars. Plus there is no water source.

The technology at this stage is not good.

Of course, as long as people create the right environment on the Moon and Mars. You can survive on your own.

It is certain to say — impossible. It's impossible at all, for sure, who's to say it's impossible.

The spacecraft should fly at a speed of x kilometers per hour in order to reach the moon at the same time as the Martian spacecraft.

300000÷ 2100=180000÷x

x=1 260 km/h.

Moon: Impossible, there are no conditions for life on the moon, there is no water and no oxygen, and there is no atmosphere, and there is a large temperature difference between day and night, so there is no way to survive.

Mars: The surface is also impossible, the temperature difference of Mars is also large, there is no oxygen, but there is water under Mars, which is the only favorable condition, and there is still a trace of possibility in the future when science and technology are developed.

The most recent Mars landing is the fastest in the United States, planned for 2020. If you want to move to the moon, you have to wait a little longer, at least you can build a research base on the moon!! Mars is even farther away, and using the traditional orbital method, people have to carry it on the spacecraft for 3 months!!

If you want to reach Mars safely, you must have enough food and drink, and you must have a harmless freezing technology! PS: You have to know that you need a lot of fuel to bring 1kg more stuff into space)

It can't be done with current technology, but it should be possible in the future.

Upstairs don't understand....Looking at various popular science books, lunar migration in this century will be fully realized. The U.S. plan to return to the moon includes establishing a permanent base on the moon and then immigrating or something. Martian immigration will wait for lunar settlements.

Although there is no liquid water on the Moon, the water content in its soil is sufficient for human activities. Water ice is present in the eternal shade of some craters. With the abundant solar energy on the moon, it is possible to refine this "water" into water that satisfies human life.

Mars is more suitable for human habitation than the Moon, and you can go to see some popular science books on astronomy...The landlord will see the clouds and the sun. The text is all written little by little with a mobile phone....Exhausted. Give it to me.

Theoretically, it's perfectly fine, but financially it's a bit overwhelming.