Is there any energy and resources that human beings can use in the universe?

Cosmic resources mainly include space resources, solar energy resources and mineral resources. Using the special environment of space, people can observe the earth from a distance through satellites and quickly collect a lot of information about the earth. For example, satellite cloud pictures taken by meteorological satellites can make better weather forecasts for us; For another example, according to satellite photos, it is found that there is a big lake under the bed of the dry Kurlanda River in Kazakhstan, and several fresh waters are found under the desert; Another example is the accurate prediction of foreign wheat production provided by satellites, and the United States alone benefits 200 million US dollars a year; Satellites can also predict wheat rust and insect pests before human discovery, which can be prevented as soon as possible. At the same time, humans also carry out a large number of scientific experiments on satellites. From 1996 to 12, Russia and the United States successfully cultivated and harvested the first batch of space wheat at Mir orbital station for the first time. It took only 97 days from sowing to maturity, which proved that living things can develop in space. This is of great significance for human beings to solve the food problem in future interstellar flight. In the supermarkets in Beijing, there are also tomatoes and peppers that sell space breeding. They are big and have strong resilience. Conditions such as weightlessness, high vacuum, ultra-clean and extreme temperature in the universe are necessary to produce some special items. 1992 10 in China, the experiment of cultivating organisms by using recoverable satellites has been carried out, and the anticancer organism asparagus has been cultivated. For another example, when making wear-resistant lead-aluminum alloy for rockets on earth, lead always sinks to the bottom. After cooling, it is not a uniform alloy block, but like a layered cake. It is much more convenient to produce this alloy in the universe. According to statistics, about 400 kinds of alloys that cannot be manufactured on the ground can be manufactured under weightlessness.

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It is a great leap in the history of human civilization that human beings enter space and begin to adapt, study, understand, develop and utilize the space environment. There are abundant natural resources in the cosmic environment.

Space resources. Using extremely vast space, artificial earth satellites can observe the earth from a height of tens of thousands of kilometers away from the earth and quickly collect a lot of information about the earth. Using the physical conditions such as high vacuum, strong radiation and weightlessness, which are difficult to simulate in the ground laboratory, various scientific experiments can be carried out on satellites, such as studying the effects of weightlessness on the growth, development and metabolism of insects, microorganisms and plants on biological satellites.

Solar energy resources. Solar energy is the most important energy source on the earth. However, most of its energy cannot reach the surface through the earth's atmosphere. How to make full use of solar energy is a scientific research topic for scientists (Figure "Assumption of Space Solar Power Station").

Mineral resources. Scientists analyzed the moon rock samples brought back from the moon by astronauts, and found that the moon rock contains all the elements in the earth's crust and about 60 kinds of mineral deposits, and is also rich in energy 3He that is not found on the earth. It is an ideal fuel for nuclear fusion reactors. In addition, there are thousands of asteroids in the orbit between Mars and Jupiter, many of which are rich in ore bodies.

Space development activities, regardless of scale, technology or economic input, are no longer independent of a country. Therefore, a trend in the development of space resources is to embark on the road of international cooperation.

The most abundant energy in space is inexhaustible solar energy, and the space solar power station is to maximize the use of solar energy. The big object in the upper left of the picture is a device that directly converts solar energy into electric energy. This device is generally formed by diffusing and infiltrating a thin layer of boron into a small piece of N-type silicon single crystal to obtain a PN junction and adding electrodes. When sunlight directly shines on a thin electrode, an electromotive force will be generated between the two electrodes. There are two basic ways of solar power generation, one is photoelectric conversion, that is, sunlight is directly converted into electric energy, which is called "photovoltaic power generation"; One is to gather solar energy, generate high temperature, and then convert thermal energy into electrical energy, which is called "thermal power generation". At present, the device widely used in "photovoltaic power generation" is "solar panel", which has been widely used in space objects such as satellites.

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