What questions exist in the universe about the universe?

Before any landing on another planet, a group of unmanned probes are needed to investigate some basic conditions and make preparations. Nothing can be done overnight, and for the success of the landing and the safety of the astronauts, preliminary exploration must be carried out.

Mars is very close to Earth in many natural conditions, and is the closest known planet to Earth. For example, the inclination of the axis of rotation, the rotation period, and the average surface temperature of Mars are very close to those of the Earth, and the existence of solid water, that is, ice, has been confirmed on Mars. Mars also has a not-so-thin atmosphere.

Mars has been properly modified to be fully suitable for human survival. In addition, Europa and Titan's natural conditions are very similar to those of early Earth, and it is possible that there are very low life forms.

Didn't there be a Chinese in the Ming Dynasty who wanted to land on the moon, and in the end they were either killed or killed.

Fell to his death. It's one thing to think, it's another thing to do.

It's not impossible, when a faster and more efficient spacecraft is developed, with the current speed of the spacecraft, it will take a month to land on Mars, who do you say will wait so long, and solve the problems of living human body and fuel.

If we want to land on other planets, we must first solve the problem of aircraft, and now the maximum speed that our aircraft can reach is only the second cosmic velocity, the first cosmic velocity can make people fly out of the earth, and if you want to fly relatively easily between the stars, you must reach the third cosmic velocity. Therefore, with the current capabilities of human beings, it is not possible to try to land on other planets.

As for Mars, it seems that the conditions on Mars are also very harsh at present, with temperatures reaching 200-300 degrees Celsius during the day due to the absence of a thick atmosphere, and temperatures reaching -100——-70 degrees Celsius at night, and there is currently no liquid water on the surface.

The power of science and technology is not good! Now it will be difficult to land the United States on the moon again!

It's not that easy! Earthlings are stupid.

That's quite far away, and the technology is not developed enough!! Actually, I want to go around...

I want to log in, ah, wait for the development of science to take your time.

Human beings have been exploring the universe for thousands of years, and the universe is beyond people's imagination. There are too many unsolved mysteries in the universe, and the most puzzled by human beings are the following:

How big is the universe, and is there a margin to the universe?

Why is there almost all positive matter in the universe?

What exactly are dark matter and dark energy?

How was life born in the universe?

Are there other high-level civilizations in the universe?

Does a wormhole exist?

Do parallel worlds really exist?

Is the universe really born of a big **?

What is the final outcome of the universe?

The universe is like a nesting doll ring after ring, and the greater the scope of human exploration, the more uncharted territory there becomes.

The question that exists in the universe is, first of all, how did the universe come about? How did the universe come about? The second is whether there is a margin in the universe and the edge of the universe is in **? These questions have puzzled scientists to this day.