Voyager 2, which is 20 billion kilometers away from the earth, sends back signals in the so-called "space"?

On August 20, 1977, NASA's Voyager 2 probe was sent for liftoff on its ascent to the solar system.

After traveling 4.1 billion light-years, Voyager 2 reached the limit of the solar system's heliosphere, the tail end of the solar wind, in November 2018. Since then, Voyager 2 has entered interstellar space, where cosmic radiation is stronger than that of the sun.

Today, the Voyager 2 probe is about 20 billion kilometers away from us. At such a great distance and after 43 years of voyage, it can still yield some important information about the surface of the solar system. And, as it sailed farther and farther, the content of information it could give became more and more precious and astounding.

Recently, the elite team of the new Voyager 2 project found based on the content of the information sent by the probe: as it increasingly avoids sunlight, the detected indoor space density shows an increasing trend. It is not the first time that such a situation has been discovered. In 2012, when the Voyager 1 probe lifted the heliosphere, a similar regularity in the direction of the density gradient was also detected on the other side of the solar system. The discovery this time is a confirmation of the results of the Voyager 1 test. Biologists speculate that this density increase may be a very large-scale feature of the very local interstellar medium (VLIM).

Although there are reports that the Voyager 2 probe flew to the edge of the solar system in 2018, it is not serious and meticulous, in other words, it is simply called. In fact, it flew out of only the heliosphere of the solar system. We know that in the case of nuclear reactions, sunlight will release a lot of radiation sources. In addition to radio waves, this radiation source also has many higher-energy plasma technologies, that is, the solar wind, which shoots into outer space at a very fast rate, and may travel far.

In addition, there is also cosmic radiation from other stars in outer space. The solar wind is stronger in the area close to the sun, and the compressive strength of the solar wind decreases as the distance increases, and it equalizes with the cosmic radiation in a certain area. All of these equilibrium points are joined together and is the heliopause of the solar system. Inside the heliopause is the heliosphere of the solar system, flanked by the VLIM, and Voyager 1 and 2 are actually only as high as this limit.

In theory, the radiation sources released by sunlight in every direction are all symmetrical, so the heliosphere should be a perfect sphere. However, because the solar system is still traveling through the solar system, this is like a bubble that has just been blown, and the direction of the driving force is very obvious——

Therefore, at this stage, biologists widely agree that the heliosphere looks somewhat like a meteorite. Fortunately, both Voyager 1 and 2 lifted the heliosphere in the direction of the driving force, but only with a certain perspective in between. If they were sailing towards the tail of the heliosphere, it might not be clear which lifetime would be thrown out.

However, Merav Opher, a professor of astronomy at Boston University, released his new scientific research results, showing that the heliosphere of the solar system should be similar to a croissant, and that's it--

This scientific research we published not long ago, "You Don't Understand Wrong, This Is What Biologists Made of the Heliosphere of the Solar System, Is It Weird?" "There is a certain detailed introduction in the article, and interested pot friends can move to read the article. All in all, for what you are going to introduce in detail today, you can temporarily ignore what the heliosphere looks like.

Generally speaking, everyone thinks that the universe is a vacuum pump, but this is not serious and meticulous. To put it bluntly, outer space is only a high-to-width ratio vacuum pump, and it is impossible to achieve a certain vacuum pump. Although the density of chemical substances is shockingly low, it is still not considered zero.

In the heliosphere, the density of protons and electronic devices carried by the solar wind is about 3 to 10 particles per cubic decimeter, with decreasing spacing. In addition, biologists estimate that the interstellar space of the solar system has an average of about 0.037 particles per cubic decimeter. At the perimeter of the heliopause where the two meet, the density of plasma technology is about 0.002 electronic devices per cubic decimeter.

Although the Voyager probe power source is lacking, the instruments and equipment for detecting plasma technology have not been turned off. With this instrumentation, biologists precisely measure the density of plasma technology at their location.

Voyager 1 passed through the heliopause of the solar system on August 25, 2012, at a distance of about 121.6 AU, or about 18.1 billion kilometers. One year later, on October 23, 2013, Voyager 1 detected the plasma density outside the heliopause for the first time at a distance of 18.3 billion kilometers (122.6 AU), and the obtained data information was about 0.055. Electronics/cubic decimeter.

One year after Voyager 2 crossed the heliopause, that is, on January 30, 2019, it also detected the plasma technology density data information of the geographic location at a distance of 17.9 billion kilometers (119 AU). , the result is about 0.039 electronics/dm3, which is basically the same as its brethren.

After the next two years of voyage, the two probes again accurately measured this data. At that time, Voyager 1 flew another 2.9 billion kilometers (nearly 20 astronomical units), and the data showed that the density of plasma technology increased to about 0.13 electronic devices per cubic decimeter.

After Voyager 2 traveled about 600 million kilometers (about 4 AU) again, it checked the density of about 0.12 electronic devices per cubic decimeter. By dividing with the previous data information, it can be found that the density increase detected by Voyager 2 is more significant.

Compared with the plasma density of the Earth's atmosphere, this data is really small. However, this is still enough to cause experts to attach great importance to it, and it may also be the key content for everyone to master interstellar space in the future. At this stage, experts are unable to clarify where exactly this density gradient direction comes from? .

Regarding the boundaries of the solar system, everyone's grasp is still very limited. It is far from the sun and the earth, and receives too little natural light. Even if people's astronomical observation ability has developed to this day, the observation of that area still has a very high degree of difficulty.

As the only probes to have flown beyond the heliosphere, Voyager 1 and 2 are key dedicated tools for our scientific study of interstellar space. As everyone knows, because the electric energy will be exhausted, the sight they can give people may not last long. According to NASA's calculations, the two probes may consume all their electrical energy in about 2025, and finally fade into the endless universe.

If we want to see more long-term interstellar space, we must have fast probes and more long-term electrical energy. The solar system is so large that we cannot ascend from beginning to end, it is like a prison. When will people completely break out of the solar system? Maybe only time will tell.