What is the purpose of life? Everyone has an answer to this kind of question. In general, when talking about life on Earth, scientists believe that in the future, there are many scenarios for Earth. It could crash into another planet, be swallowed by a black hole, or be killed by an asteroid. We cannot be sure which one is the end of the world scenario will lead to the destruction of our planet, but one thing is certain: even if the earth is in the rest of the raw from alien attack, escaping space rocks and avoiding disaster, one day we will eventually destroy our own sun, and today we're talking about topics related to the sun!
The sun is a star, and like all stars, it's essentially a ball of hot plasma around which the other planets orbit. However, a recent mysterious discovery on our sun that has astronomers worried about our safety involves the burning of hydrogen. We know that the sun survives by burning hydrogen atoms into helium atoms at its core. In fact, the sun burns about 600 million tons of hydrogen per second, and when the sun's core becomes saturated with helium, it contracts, causing the nuclear fusion reaction to accelerate, which means the sun releases more energy.
In fact, every billion years, the sun burns about 10 percent more energy for hydrogen, and while 10 percent doesn't seem like much, the difference could be disastrous for our lives and could even cause the sun to become a red giant earlier! Jillian Scudder, an astrophysicist at the University of Sussex, said: "Predictions of what will happen to Earth over the next billion years as the sun brightens are quite uncertain, but overall the increased heat from the sun will cause more water to evaporate from the surface and be retained in the atmosphere.
Instead, water acts as a greenhouse gas, it traps more heat and speeds up evaporation, but before it runs out of hydrogen, the sun's high-energy light bombards our atmosphere, splitting the molecules and allowing water to escape as hydrogen and oxygen, eventually drying up the planet's water 39bet-đua chó-game giải trí -đá gà-đá gà trực tuyến-đánh bài. Not only that, but a 10-fold increase in brightness every billion years means that 3.5 billion years from now, the sun will be nearly 40 percent brighter, which will evaporate Earth's oceans, melt Earth's ice caps and take all the water out of the atmosphere.
Our planet will become as hot, dry and barren as Venus, and it will become more and more difficult for us to survive as time goes by. A tower of tropical electric particles called the solar wind pours out of the sun and hits our planet at about two million kilometers per hour. Fortunately, Earth's magnetic field deflects and dissipates the strongest of these winds, leaving only a warm blast of wind to penetrate the Earth's atmosphere. But in recent years, the Earth has shown some signs!
In one published study, the colorful Northern Lights, or Aurora borealis, are seen flashing in the sky as runaway solar particles fly toward Earth's magnetic poles. But new research suggests that our planet's magnetic shield may not always be so strong, and that the solar wind is only getting stronger with the eventual demise of our native star. On July 21, in the journal Monthly Notices of the Royal Astronomical Society, a team of astronomers calculated how the strength of the solar wind will evolve over the next five billion years or so, as our star runs out of hydrogen fuel and burns and expands into a giant red giant.
By then, the solar wind would be so strong that it would erode the Earth's magnetic shield, and from there, much of the Earth's atmosphere would be blown out into space, while any life on Earth that could survive that long would be rapidly wiped out. We know that solar winds have eaten away Mars' atmosphere in the past, but unlike Earth's, Mars' atmosphere is not large. Future solar winds could do the same to planets protected by magnetic fields.
About four or five billion years from now, the sun will burn off the last of its hydrogen and start burning helium. Instead, as the sun sheds its outer layers, it loses mass, reducing its gravitational pull on all the planets and causing them to drift farther away. But its atmosphere would extend beyond Mars' current orbit, engulfing Mercury and Venus. Earth, on the other hand, has two options: escape the expanding sun or be swallowed by it. But even if our planet slipped out of the sun's reach, it would still face heat!
After billions of years, scientists believe our Sun will eventually run out of hydrogen for nuclear reactions at its core, according to a new study. Without this fuel, the sun's core would begin to contract under its own gravity, while the outer layers of the star would begin to expand. Eventually, the sun will become a red giant - a giant red sphere with a radius tens of millions of kilometers beyond its current boundary. As the sun's outer atmosphere expands, it will devour and burn every planet in its orbit. Mercury and Venus would almost certainly be destroyed, and the Earth would probably be destroyed.
According to NASA, after one billion years of expansion, the sun will collapse into a wizened dwarf, then burn billions of years at this time again, before the energy completely extinguished. If the earth is able to in the process of the sun into a red giant hard to survive, our planet will remain very different from today in the solar system. As the sun's core shrinks, its gravitational pull on the planets will weaken, causing any planets that aren't swallowed to drift about twice as far away. According to NASA, the radiation emitted from the sun would be the same as it is today, and the radiation seeping from the red giant sun would be much stronger than it is today. So how intense is the radiation going to be? Could the Earth's magnetosphere withstand the impact?
The researchers simulated winds for 11 different types of stars, ranging in mass from one to seven times the mass of the Sun. The researchers found that as the diameter of the sun at the end of its life, the solar wind speed and density will be volatile, alternately any planet's magnetic field near the expansion and contraction, is the only way to resist in the evolution of stars and planets in the whole process of maintain its magnetic field, but it is a pity that the planet is very difficult to maintain its protective magnetosphere, in other words, Life on Earth will eventually disappear!
So the search for alien life has been going on, and some astronomers think white dwarfs may have habitable planets in their orbits, in part because these death stars don't generate solar wind. So if life does exist on Earth-like planets around white dwarfs, it must have evolved after the star's intense red phase ended. In other words, it's unlikely that life on any planet will survive the death of its son, but once the sun contracts and shuts down its fierce winds, new life may emerge from the old ashes!