The fusion reaction inside the sun has been increasing, on average, every 1 billion years, it will release about 10% more energy, according to this calculation, in 1 billion years, the temperature of the earth's surface will rise to more than 50 degrees Celsius, then the earth will no longer be suitable for human survival, and in 5 billion years, the sun will also be because the core "fuel "The exhaustion of the core "fuel and expand into a red giant ......
In short, the Earth will not always be suitable for human habitation, sooner or later, humans must leave the Earth, or even leave the solar system, otherwise, human civilization will completely disappear from the universe. But it seems that the sun leaves a lot of time for human beings, and perhaps we can be optimistic that in a few hundred million years, human beings will have developed into a super civilization that can traverse the universe.
However, the sun is not the only threat from the universe, we should know that there are 200 to 400 billion stars in the Milky Way galaxy, they and the sun together around the galaxy's center of mass, although the stars in the galaxy as a whole are moving in the same direction, because of the large number of stars in the galaxy, their rotation speed is not uniform, coupled with the role of gravity, so the stars and The stars are not all moving in the same direction.
Confirmed again! Our solar system will be invaded by a star
Scientists have been concerned about the future invasion of our solar system by other stars, and by analyzing data from satellites, they can calculate the future trajectory of many stars in the region near the Sun.
In 1989, Hipparchus, a satellite designed to measure the parallaxes and motions of stars in our galaxy, was launched, and based on updated measurements from Hipparchus in 2007, scientists have calculated that one star, Glimpse 710, will be in the vicinity of the Sun in about 1.5 million years. The star will be unusually close to the Sun in about 1.5 million years when it is calculated to be within 1.1 light-years of the Sun.
In 2013, Gaia, the "successor" to the Iva Valley satellite, was launched, offering greater precision and a larger detection range than its "predecessor. It has higher accuracy and greater range than its predecessor. Recently, a team of researchers from the Pullover Observatory in St. Peters burg reconfirmed that Glimpse 710 will be near the Sun in the future, according to the "Gaia Early Data Release 3" (GAIA EDGER) updated on Dec. 3, 2020. Anomalous proximity.
According to the researchers, Glimpse 710 is currently 62 light-years away, and according to their calculations, the star will invade our solar system in about 1.32 million years, when the star will be much closer to the Sun than previously calculated, with a calculated value of 0.020 ± 0.007 seconds difference.
The difference of 1 second is about 3.26 light-years, which means that the closest distance between "Glimpse 710" and the Sun can reach 0.065 light years (about 4100 astronomical units), relatively speaking, the radius of the solar system is about 1 light year (using the Otter Nebula as the boundary).
Not much time left for humans
Observations show that "Glimpse 710" is an orange dwarf, located in the sky in the direction of the constellation Serpens, with a mass of about 60% of the Sun's mass and a diameter of about 800,000-900,000 km. It is easy to guess what will happen when such a huge star invades our solar system.
We know that there are a large number of small objects in the Oort Nebula, Kipper Belt, and Asteroid Belt, which are small in mass and fast in speed and are very susceptible to the gravitational pull of other objects. It is conceivable that when "Glimpse 710" comes, its huge gravitational force will cause a large number of small objects to deviate from their original stable orbits, thus increasing the risk of Earth being hit by small objects.
In addition, in the scale of astronomy, 0.065 light years is already very close, when a star with more than half the mass of the Sun appears in such a close position, its gravity will also affect the eight planets of the solar system, in this case, although the eight planets will still be firmly bound by the Sun's gravity, their orbits will be more or less certain shift, and the consequences of this will be unpredictable. The consequences will be unpredictable.
In short, there is not much time left for mankind, and if we do not prepare well before the arrival of "Glimpse 710", we may face a huge crisis. The good thing is that mankind still has 1.32 million years, according to the current pace of development of human technology, which should be enough for mankind to develop a powerful technology to resolve this crisis.
It is conceivable that humans in the future can change the orbit of the sun through stellar control devices, so that the sun and "Glimpse 710" at a safe distance miss each other perfectly, and if then the human technology is strong enough, and can even directly destroy this threat to human stars.
About the Creator
SPACE OF EARTH
Humans are filling up the area round Earth with trash. ARCHIVE: “three, two...” Decades of house exploration that started with a single satellite tv for pc launch in 1957... ARCHIVE: “One of the splendid scientific feats of the age.” Have left discarded rocket bodies, mission-related particles and heaps of satellites – many of them lengthy deserted and no longer useful – crisscrossing at excessive speeds simply above Earth's atmosphere. And with a booming house enterprise launching extra objects into orbit than ever before, this crowding is progressively growing the chance of catastrophic in-orbit collisions. Scientists fear that a runaway chain response of collisions and fragmentation may want to one day fill Earth's orbit with so lots particles that area will end up unusable to humans. It's why the world's main area businesses and some for-profit businesses are working on massive thoughts to restore our house particles problem. From trash accumulating spacecraft armed with harpoons and nets... to a large cloud of steel dust. And there may be one answer it is been proposed for years to halt these unsafe bits of rubbish in their tracks. Lasers. Because if we get innovative and begin addressing this trouble proper now, we can nevertheless repair it earlier than it is too late. The sizeable majority of human-made objects surrounding Earth are right here – in a area referred to as “low Earth orbit.” It's the place we have verbal exchange satellites, plus spacecraft like the International Space Station. And our big quantity of house trash. The extra objects we put in house capacity greater possibilities of these objects smash into every other, smash apart, and multiply. And all it takes is a handful of fragmentation occasions to dramatically make bigger the whole variety of objects orbiting Earth. Like in 2009, when a defunct Russian satellite tv for pc by accident collided with a industrial satellite, exploding into hundreds of trackable fragments. And in 2007, when China deliberately destroyed one of its very own satellites in a weapons test. Which additionally resulted in tens of heaps of fragments of various sizes of debris. A theoretical cascade impact known as the "Kessler syndrome," delivered in the 1970s, warned that if sufficient incidents like these occur, the fragments of particles they create ought to set off an uncontrollable variety of catastrophic collisions. Exponentially growing the subject of particles round Earth. But we can nonetheless repair this earlier than it is too late. And there is a few methods it should happen. The way to get rid of most area particles is to sluggish it down adequate to fall out of orbit and into Earth's atmosphere, the place it burns up and is destroyed. But exceptional sized area junk requires unique methods to do this. The largest bits of house particles measure greater than 10 centimeters in dimension This consists of lifeless satellites, rocket our bodies and huge portions of particles created in the course of house missions. These are massive sufficient to be tracked from Earth. And scientists are creating tiny spacecraft that can attain these objects and sluggish them down, the use of more than a few techniques to both push or pull them. Guiding them down to Earth's environment to be destroyed. Commercial agencies like Europe's ClearSpace and Japan's Astroscale are working with international house businesses on this tech. Hoping to reveal the elimination of massive particles someday in the subsequent decade. The two smaller classifications of house particles typically come from fragmentation activities like explosions and collisions.
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