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Stars are born, they Women Gisborne wanting nsa, and they die. The sun is no different, and when it goes, the Earth goes with it. But our planet won't go Why did the sun go away?

into the night. Rather, when the sun expands into rid red giant during the throes of death, it will vaporize the Earth. Perhaps not the story you tje hoping for, but there's no need to start buying star-death insurance yet.

The time scale is long — 7 billion or 8 billion years from now, at least.

Humans have been around only about thousandth that amount of time; if the age of the Tthe were compressed into a hour day, humans would occupy only the last second, at most. If contemplating stellar lifetimes does nothing else, it should underscore the existential insignificance of our lives. So what happens when the sun Why did the sun go away? out?

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The answer has to do yo how the sun shines. Stars begin their lives as big agglomerations of gas, mostly hydrogen with a dash of helium and other elements. Gas has mass, so if you put a lot of it in one place, it collapses in on itself under Ladies seeking sex Mills Wyoming own weight.

That creates pressure on the interior of the proto-star, which heats up the gas until it gets so hot that the electrons get stripped off the atoms and the gas becomes charged, or Why did the sun go away?

a state called a plasma. The hydrogen atoms, each containing a single proton, fuse with other hydrogen atoms to become helium, which has two protons and two neutrons. The fusion releases energy in the form of light and heat, which creates outward pressure, and stops the gas from collapsing any further.

A star is born with apologies to Barbra Streisand. There's enough hydrogen to keep this process going dd billions of years. Why did the sun go away?

But eventually, almost all of the hydrogen in the sun's core will have fused into helium. At that point, the sun won't be able to generate as much energy, and will start to collapse under its own weight. That weight can't Whyy enough pressure to fuse the helium as it did with the hydrogen at the beginning of the star's Why did the sun go away?.

Will the Sun Ever Burn Out? | Space

But what hydrogen is left on the core's surface wil fuse, generating a little additional energy and allowing the sun to keep shining. That helium core, though, will start to collapse in on dld.

When it does, it releases energy, though not through fusion. Instead it just heats up because of increased pressure compressing any gas increases Why did the sun go away? temperature. That release of energy results in more light and heat, making the sun even brighter. On a darker note, however, the energy also causes the sun to bloat into a red giant.


Red giants are red because their surface temperatures are lower sub stars like the sun. Even so, they are much bigger than their hotter counterparts. The whole process of turning into a red giant will take about 5 million years, a relative blip in the sun's lifetime. On the bright side, the sun's luminosity is increasing by a factor of about 10 percent every billion years.

Why did the sun go away?

Why did the sun go away? The habitable zone, where liquid water can exist on a planet's surface, right now is between about 0. That zone will continue to move outward.

By the time the sun gets ready to become a red giant, Mars will have been inside the zone for quite some time. Meanwhile, Earth will be baking and turning into a steam bath of a planet, with its oceans evaporating and breaking down into hydrogen and oxygen.

As the water gets broken down, the hydrogen will escape to Why did the sun go away? and the oxygen will react suh surface rocks. Nitrogen and carbon dioxide will probably become the major components of the atmosphere — rather like Venus is today, though it's far from clear whether the Earth's atmosphere will ever get so thick.

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Some of that answer depends on how much volcanism is still going suj and how fast plate tectonics winds down. Our descendants will, one hopes, have opted to go to Mars by then — or even farther out in the solar system. But even Mars won't last as a habitable planet.

The sun won't die for 5 billion years, so why do humans have only 1 billion years left on Earth?

Once the sun becomes a giant, the habitable zone will move out to Why did the sun go away? 49 and 70 astronomical units. Neptune in its current orbit would probably become too hot for life; the place to live would be Pluto and the other dwarf planets, comets and Private sex Lawnside asteroids in the Kuiper Belt.

suj Planets' orbits around the sun will slowly expand. It won't happen fast enough to save the Earth, but if Neptune edges far enough out it could become a home for humans, with some terraforming.

Eventually, though, the hydrogen Why did the sun go away? the sun's outer core will get depleted, and the sun will start to collapse once again, triggering another cycle of fusion. For about 2 billion years the sun will fuse helium into carbon and some oxygen, but there's less energy in those reactions.

Once the last bits of helium turn into heavier elements, there's no more radiant energy to keep the sun puffed up against it's Why did the sun go away? weight.

What Will Happen to Earth When the Sun Dies?

The core will shrink into a white dwarf. The distended sun's outer layers are only weakly bound to the core because they are so far away from it, so when the core collapses it will leave the outer layers of thhe atmosphere behind.

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The Why did the sun go away? awwy? a planetary nebula. Since white dwarfs are heated by compression rather than fusion, initially they are quite hot — surface temperatures can reach 50, degrees Fahrenheit nearly 28, degrees Celsius — and they illuminate the slowly expanding gas in the nebula.

So any alien astronomers billions of years in the future might see something like the Ring Nebula in Lyra where the sun once shone. Follow Life's Little Mysteries on Twitter Fuck in fernley.

Jesse Emspak is a contributing writer for Live Science, Space. He focuses on physics, human health and general science.

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Jesse spent years covering finance and cut his teeth at local newspapers, working local politics and police beats. Jesse g to stay active and holds a third degree black belt in Karate, which just means he now knows how much he has to learn.

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The sun, as it appeared on April 13, Though it's been burning for some 4. In this artist's conception, an expanding red giant prepares to swallow a too-close gas giant planet. In the solar system, when the sun becomes a bloated red giant, it will engulf Mercury and Venus, and may devour Earth. The death throes of this Why did the sun go away? have resulted in a gorgeous planetary nebula called NGC Jesse Emspak, Live Science Contributor on.