Hearing what Wu Hao said, several people couldn't help but nodded, but Zhang Xiaoman was still a little bit worried about not being able to cook on the moon.
Seeing this, Wu Hao smiled and said: "Actually, if you want to stir-fry, you can still stir-fry. It's just inconvenient. For example, the gravity on the moon is only one-sixth of that on the earth, which means that if you turn the spoon, the pot will
It takes a long time for the vegetables to fall down, which is very inconvenient.
Secondly, cooking is easy to produce fumes and the smell is strong. The space inside the scientific research station is limited, and the ventilation effect is relatively poor, and the air is circulated. So when you cook a dish, the fumes may spread throughout the scientific research station.
All.
Even if there is a special range hood, we still need to collect the fumes and then process them, which will cost a lot more. This is actually the same as why cooking cannot be done on a submarine.
Finally, open flames are prohibited in the scientific research station, so you can only use electric ceramic stoves or induction cookers for heating. If you use an open flame, it will greatly consume the oxygen in the scientific research station, which is not worth the gain, and it is also easy to cause
fire.
If the astronauts and scientific researchers on the space station want to eat stir-fried vegetables, they can completely supply them from the earth. They can be stir-fried on the earth and then vacuum-sealed and refrigerated, and then transported to the moon for processing."
Premade dishes? Lin Wei asked
No, Wu Hao smiled and shook his head: "It still needs to be cooked for a while."
"How big is your lunar scientific research station?" After hearing Wu Hao's words, Zhang Xiaoman couldn't help but wonder. Although she also watched the news, the news was too unintuitive. It was a rare opportunity, so she thought about it.
Listen to Wu Hao himself.
The entire Lunar Zhihai Lunar Surface Scientific Research Station is divided into three phases. We are currently planning to build this first phase project. The total construction area of the entire first phase project is about more than 500 square meters.
So big. After hearing Wu Hao's words, several people couldn't help but be stunned, and Zhang Xiaoman was also surprised.
Wu Hao smiled and nodded: "This is only the total building area, which also includes the space occupied by some facilities. The actual living space for people is only about three to four hundred square meters, which is equivalent to about a large flat floor."
That's also very big. Wu Jianhua said.
It is relatively large, compared to the space above space. However, for people who are active for a long time, this area is still too small. If you are bound to this space for a long time, some psychological problems will still occur.
.
At present, the astronauts and scientists on our National Space Station basically adopt a semi-annual rotation system to rotate personnel up and down. The reason for adopting the semi-annual rotation method is mainly due to cost, personnel health, and material consumption, etc.
Comprehensive consideration of the field.
We are orbiting in a low-Earth orbit of about two to three hundred kilometers above our heads, and the distance is about the same as the journey back to our hometown.
The distance between the moon and the earth is 380,000 kilometers, and the distance between the space station and the ground is not worth mentioning compared to the distance between the earth and the moon.
What is the concept of 380,000 kilometers? The circumference of the earth's equator is about 40,000 kilometers. If converted, the distance between the earth and the moon is almost nine times the circumference of the earth's equator. That is to say
We're going nine and a half times around the Earth's equator!
so far!
Hearing Wu Hao's description of examples, Zhang Xiaoman, Wu Tong, and Lin Wei all showed expressions of experience. They had only heard about such a distance before, but they had no reference, so they naturally had no idea. Wu Hao listed it out.
Reference object, which made them surprised later.
If it's so far away, why do we still have to go to the moon? Isn't it that the moon is full of sand and people can't live at all? Zhang Xiaoman raised his doubts.
Wu Hao smiled and replied: "Because the moon is the closest planet to our earth. Compared to the boundless universe, the distance from the earth to the moon is simply no distance.
For example, if the universe is compared to the earth, then the distance from the earth to the moon may be only one foot, or even shorter."
Looking at the surprised expressions of several people, Wu Hao smiled and continued to popularize science: "In addition to the moon, Mars is also an important planet for our exploration, because Mars is a planet relatively close to our earth and a neighbor of our earth. So.
How far is it from our earth? It's almost 200 million kilometers."
This is too logical. When Wu Tong sighed this time, she was also shocked by the huge astronomical figures.
Hahaha, this is relatively close within the astronomical unit. You must know that the longest expression in astronomy is light year, which is the time it takes for light to travel for one year.
So how fast is the speed of light? It is 300,000 kilometers per second, which means that the distance from the earth to the moon only takes a little bit more than one second for light to reach.
As for Proxima Centauri, the nearest star to our solar system, its distance from our sun is about 4.2 light-years. And our current known universe, that is, how big the observable universe is, is probably a universe with the earth as the
The center of the circle is a sphere with a radius of 46 billion light years.
this……
After hearing Wu Hao's description, everyone including Wu Jianhua opened their mouths and could not calm down their surprise for a long time.
After such a conversion, a human being in the universe may be equivalent to a bacterium in the natural world, no, it may be an atom smaller than a bacterium, which is insignificant.
"So how many stars like the sun are there in the known universe? I don't know because it is difficult to estimate. But scientists have a rough estimate. Their number is roughly equivalent to all the sand on the earth.
In other words, our sun is just like a grain of sand on the earth in the universe, insignificant."
This is too huge. Everyone couldn't help but sigh.
Wu Hao smiled and said: "Yes, it is precisely because the universe is so big that we have to go out.
The father of modern aerospace and Soviet scientist Konstantin Tsiolkovsky once said that the earth is the cradle of mankind, but mankind cannot live in the cradle forever.
With the continuous development of our human society, the resources on the earth are increasingly insufficient for human use. So what should we do at this time? We can only go out.
In this huge universe, there are inexhaustible resources for us. Not to mention other things, the resources in the solar system alone are enough for us humans to use for tens of thousands of years.
The solar system is equivalent to a drop in the ocean or a drop in the ocean in the entire universe. In the future, when the resources on our planet are used up and the resources in the solar system are used up, we will have to look further afield.
Although this time is still far away from us, we cannot wait until all resources are used up before thinking about this, we must prepare for a rainy day."