Gravity joke

Gravity is the force produced by the earth's attraction to objects. It is because of this power that we and everything in the world can survive on this earth. In this gravity environment, people walk and work on the ground, and plants grow on the ground and thrive in the upward direction. In this environment, our life is quiet and peaceful, but let's imagine what the earth would be like without gravity. Some people will say, "If there is no gravity, people will float in the air." It is also said that "breaking the world high jump record will be a piece of cake". Indeed, without gravity, everything in the world would float in the air. If it's cooking, that dish can't be cooked well. Because there is no gravity, the food will not stay in the pot honestly. Even if it is cooked, it will take a long time to pay the price. But there's no gravity. Good. You see, if you need to work at high altitude, it will be safe and convenient without gravity. Think about that spaceship again. In the case of weightlessness, if you want to eat, you can taste delicious food in one breath. If there were no gravity in the world, it would be really wonderful. People jump around or fly around in the air like kangaroos, enjoying the vastness of the sky; Water floats in the air in the form of clouds. If you want to drink water, put your mouth together. But the fish will be miserable. They may have to move out. Huh? If there were no gravity, maybe Newton wouldn't have been hit!

Space is a magical world full of charm, and space life is a magical topic full of charm and curiosity.

The space environment is very different from the earth environment. There is no air, no gravity and dangerous space radiation. Of course, there is enough air for you to breathe in a closed space station or space shuttle cabin. Good spacecraft shielding materials can effectively block space radiation, but "weightlessness" will bring some troubles to life.

If you live in space in the way of the earth, you will definitely make a lot of big jokes. For example, when eating, you carry a bowl of rice, and the rice will float all over your cockpit. You may not be able to eat anything with your mouth open. When you keep your mouth shut, rice grains may float into your nostrils and choke you to death. You want to sleep comfortably in bed, but you will find that there is no upper and lower boundary in space, and there is almost no difference between "lying" and "standing" ...

So how do astronauts eat and sleep in space?

100 variety of space food

Astronauts' meals are varied, from the initial dozen to more than 100. Astronauts usually eat four meals a day, and the recipes are not repeated for a week. Some people think it must be boring for astronauts to make toothpaste out of their food. In fact, this is the case of early astronauts, and now it is not what it used to be. Astronauts can eat sausage pies, spicy grilled fish, roast beef with potatoes, buttered bread, lobster sauce broth, tuna salad, biscuits, chocolate, yogurt, preserved fruit, juice and other delicacies in space. American astronauts can even drink their favorite Coca-Cola. However, astronauts can't eat casually. They must eat according to the recipes prepared by the nutritionist on the ground. When the astronauts on the American space shuttle eat, they first take out the plastic bag marked "which day and which meal" from the food cabinet. There are seven kinds of food in each plastic bag for astronauts to eat. Space food is dehydrated food. Before eating, you can put the food in a bowl-shaped container, then inject a certain amount of water into the container with a syringe and heat it in the oven. A meal can be cooked in less than half an hour.

Unusual eating movements

The space dining table is specially made. It is magnetic and can absorb knives, forks, spoons, bowls, plates and other tableware. The table is equipped with a water cooler and a heater. When eating, astronauts must first fix their feet on the floor and their bodies on the seats to avoid fluttering. Don't worry about the food on the table. You must pay attention to the coordination of a series of actions such as serving bowls, meals, opening your mouth and chewing. Gently end the bowl, too hard, rice will float out of the bowl; It is necessary to be decisive in clamping rice and vegetables, to be accurate in clamping, and to clamp in clamping. It's best not to pull into the bowl, lest the food drift away. Forks are the best. After the food is caught, open your mouth and shut up quickly, because even the food put in your mouth will fly away if you don't shut up; When chewing, the rhythm should be slowed down. Chewing slowly is beneficial to digestion, and it can also reduce the generation and excretion of waste gas in the body and avoid the pollution of astronauts' living environment.

Some people like to chat while eating, and eating in space is the most taboo. Eating and talking will make the food scraps chewed in your mouth fly out of your mouth and float into the restaurant or living room. Astronauts are easily suffocated by their lungs if they accidentally inhale into the nasal cavity.

Confused and strange sleeping positions

It is indeed a "confused feeling" for astronauts to sleep in space. One of its manifestations is that it is black and white, and the other is that it sleeps strangely.

Black and white means that astronauts sail around the earth in the sky, and the sunrise and sunset in space depend on the time for the spacecraft to orbit the earth once. Sometimes sunrise and sunset alternate many times in 24 hours, so astronauts can't follow the life habit of "sunrise and sunset" on earth, so they have to arrange their work and sleep mechanically according to the hours.

Strange sleeping position means that astronauts can't find the feeling of "lying down" in the weightless environment of space. In the gravity environment of the earth, people are used to setting the direction of gravity as "down" and the direction of "sky" as "up", that is, people often say that "the foot steps on the earth and the blue sky is overhead". But in the weightless environment, people lose the reference coordinates of "up" and "down", their feet can't reach the ground, and the sky is all around them. You can't tell up from down at all, so there is no such thing as lying flat when sleeping. Because you can fall asleep standing, lying or lying on your stomach, astronauts can sleep in the space capsule, hang it on the wall, tie it to the bed, hang it on the beam and lean on the table.