With the level of knowledge and wisdom of Prince William and Anya, it is not enough to imagine what power an asteroid with a diameter of 400 meters will release when it hits the earth at high speed.

But listening to Han Xuan's tone, he could slightly realize the seriousness of the matter, and when he learned that such an asteroid could destroy the entire London or New York, he couldn't help but show a look of fear.

A few years ago, the large meteorite that accidentally fell in the snow-capped mountain pasture could already make the surrounding ground tremble, and now the one flying at high speed in the depths of the universe is much larger than it......

"Seventy-one percent of the planet is covered by seawater, along with the South and Arctic continents and sparsely populated Africa, central Australia, the Siberian plains, and so on.

If the fall falls in these places, it will not cause too many casualties, and the impact can be eliminated in a short time.

In terms of probability, there should be no need to worry too much, we still have enough time to prepare for it, and when the asteroid slowly approaches, scientists can calculate the exact place of its fall.

As it stands, it is most likely that it will pass away from the Earth, or unfortunately pass by the Earth through the gravitational keyhole, and then, if we are lucky, we will be able to see a second moon. ”

The probability of hitting the Earth is still quite low, and even if it is successfully affected by the gravitational keyhole outside the Earth, it may deviate from the Earth's orbit and not hit the Earth until the next cycle, or other cycles, and it is likely that humans will have the ability to withstand an asteroid impact of this magnitude.

Han Xuan's vigilance against this is not high, everything remains to be seen, in recent years, the earth is still safe.

As soon as he finished shrugging his shoulders, Prince William raised his own question: "But it can also fall in densely populated areas, can't it?" ”

"yes, that's why the U.S. is setting off the alarm and preparing the rest of the world for the crisis.

When I return to the United States, I will learn more about Apopel's situation and tell you later.

Let's not talk about it, let's have dinner first, I'm a little hungry.

I like to see the night sky of these desert countries the most, the lack of water vapor and pollutants to block the breathtaking.

Every summer, I can see a similar scene from my farm......"

Hearing Han Xuan's words, Anya looked up, and Fat Ding also raised his head.

The Milky Way is clearly visible, with a large cluster of stars in the shape of long strips, and other places are also covered with stars, and the presence of a near-Earth moon can be seen with the naked eye, which is brighter than Venus, moving across the sky......

When it comes to satellites, we have to talk about the recent big moves made by Motorola.

In the past few years, it has been stumbling vigorously, and it seems that it is about to ban the major telecommunications operators and seize half of the world's telecommunications market.

It all starts with Motorola's "Iridium Project" with a total investment of nearly $5 billion.

Since the late 80s, the top management of Motorola has started the idea of dominating the telecommunications operation industry, and in 1991 set up the Iridium company, planning to launch a total of 66 near-Earth satellites into outer space, with an estimated service life of five years, in an attempt to establish the best satellite communication service channel.

In fact, just like in its previous life, it did.

In the two years from 1996 to the present, Motorola has spent nearly $5 billion to send 66 satellites into space, successfully established a global satellite communication system, and in order to win over operators in various countries, it has also loaned $3 billion to banks as a follow-up investment, resulting in the Iridium project being burdened with a heavy burden as soon as it was born.

Han Xuan has been paying close attention to this "spectacular" plan, which can be called "spectacular", last month, US Vice President Mr. Gore, just became the first user of the Iridium satellite communication system, and successfully used it to get through his wife's phone, and the live picture was seen by countless families through live broadcast.

As a modern person who has experienced the future, it is difficult for Han Xuan to understand Motorola's behavior as a mobile communication network composed of 66 low-orbit satellites, which aims to break through the limitations of terrestrial mobile communication and realize the globalization of personal communications.

In fact, in the early nineties, the entire mobile communication system was still very imperfect, and it was in the era of transition from analog signals to digital signals, and people's demand for real-time communication was becoming more and more intense.

The cost of building a terrestrial communication network covering the world is simply astronomical, referring to the investment of hundreds of billions of yuan in the future of China Mobile, you can roughly know that Motorola believes that no company has the strength to lay hundreds of thousands of base stations, so it began to set its sights on the sky.

At the time, this idea was not wrong, but fate played a joke on Motorola.

The development of digital signals is much faster than expected, almost every year, and with the investment of funds, breakthroughs have been made in various technologies, forcing the Iridium plan to go to market ahead of schedule, resulting in the entire Iridium global satellite communication system, which is actually not stable.

When users use it, the drop rate is as high as about 10%, which is higher than the drop rate of ordinary mobile phones, and in underdeveloped areas, the drop rate when communicating with blueberry mobile phones can be controlled within 6 percent, and the quality is commendable.

According to expectations, Iridium must have at least 500,000 customers to ensure profitability, and when the pre-investigation was conducted, the number of customers who were interested in using it far exceeded this number, reaching about 2 million, making Motorola tempted by the profit prospect and making it out of the head.

In Han Xuan's view, this is a project that is destined to lose money, except for some special industries, no customer will want to use an antique sky-high mobile phone that weighs a catty, costs $3,000, and costs up to $7 per minute call.

At the end of last year, Iridium also approached the Snow Mountain Group, tried to cooperate with him, and successfully persuaded Anthony to execute, but the investment plan was decisively rejected by Han Xuan, this plan deviated from the development direction of the communication system in later generations, its initial investment is too large, and the service life of the satellite is only a few years, if it is not known in advance, maybe Han Xuan will really take a fancy to it, and become a sad "pick-up man".

It is precisely because of the limitations of satellite lifespan that major communication operators would rather spend a lot of money to build base stations on the ground than take Motorola's ready-made global satellite communication system.

In the face of the imminent big crisis of competitors, Han Xuan only wants to say three words: hahaha!

Burdened with huge debts, the capital chain may break at any time, and when people find out that the Iridium plan will not work, Motorola's stock price will inevitably fall sharply, coupled with the encirclement and suppression of the Blueberry Group, maybe it will fall into bankruptcy in advance in this life......