One of the biggest threats to the universe faced by our civilization is the possibility of coronal mass ejection directly against the earth, or in fact it is inevitable. Our technology, especially power grids and satellites, is easily affected by geomagnetic storms that throw coronal mass ejections. When a local magnetic storm occurs, if we don't make better preparations, it will cause at least trillions of dollars in losses. But just like the threat of moving asteroids, we can do something to protect the earth. In a paper written by Manavis Lingam and Abraham Robb, they clearly explained what losses will be caused by throwing coronal mass and what we can do to prevent throwing coronal mass. They suggested that they could create their own shield between the sun and the earth in a fairly direct way.

The method is to launch materials used to make generators or develop asteroids directly into space to obtain materials. They estimate that the cost of building their shield is similar to that of building the International Space Station. This method is feasible, and the cost is much lower than the loss caused by coronal mass ejection. But the most interesting part of this article is the supplementary explanation at the end of the article. They pointed out that M-type and K-type dwarfs are the most abundant stars in the universe, and K-type dwarfs are widely considered to be more suitable for life than our own G-type stars. At the same time, with the increasing dependence of human beings on electricity and cosmic infrastructure, we are more vulnerable to extreme weather events. In fact, if the Carrington incident happened today, it is expected to cause global losses to power grid, satellite communication and global supply chain.

According to the report of the Cosmic Research Council in 2009 ("Serious Cosmic Meteorological Event 3354 Understanding Social and Economic Impact"), it is estimated that the global economic loss will reach 10 trillion US dollars, and it will take several years to recover. The threat from the universe is far less than other possible threats. Judging from the dangers in the sky, most of the attention in the past was focused on asteroids. The physical influence of the past is just like the future. However, unless their orbit deviates from the orbit. However, the biological impact of solar flares is very small, mainly affecting technology. But a century ago, there was not much technical infrastructure, and technology was multiplying. Therefore, the past and future losses are very asymmetric.

To be sure, on a longer time scale, very powerful rare solar flares will become more possible. Coupled with the increasing existence of human beings and dependence on spacecraft and satellites, there will be more and more dangerous connections somewhere in the future. In the next 150 years, there will be a loss equivalent to the current US gross domestic product (GDP) of 20 trillion US dollars, and the loss will increase exponentially until the technological development is saturated. These predictions have never been tried before, and a new idea of how to reduce the damage of high-energy particles through magnetic shielding is put forward.