Dying Stars May Transform

I found an article titled, “Dying Star May Transform Frozen World into Haven For Life”. This article stars off explaining when older stars reach a certain time in their life they begin to die or run out of energy. They swell up to hundreds of times of their actual size. And gulping themselves are the stars orbiting them. They ask two question many through this article and that is, can planets that escape fiery demise still support life?, and in this states can planets near the dying stars host life? Research has answer these question, saying yes it is possible. In roughly 1.5 billion years there will have begun to march to their graves and start expanding. It’s expected to expanded to 200 times its current size. It will also swallow many planets like Mercury and Venus, and probably making Earth unlivable.  Astronomers have proven that red giants can be stable for billions of years. There is new work providing a in-depth look at how long planets can remain stable around these red giants. In many cases for up to nine billions years. Which happens to be twice Earths current age. They way a star evolves and dies involves a couple of thing. First the luminosity is the amount of light it emits in any given time, is a big factor in defining the habitable zone. As a star swells up into becoming a red giant its luminosity increases. When stars swell up they lose luminosity, because of the high mass. This high mass gets blasted outward, which can cause a stellar wind. This new work shows that some of the planets, can lose their atmosphere during this evolution. When they are located close to these stars, along with contributing factors like low gravity.

The fourteenth conceptual objective is, I can describe how stars can evolving and die. After many years helium collects to each other in space called helium ash. With the helium ash the helium core becomes compressed together with electrons, Which only have  a few places they can go, which degenerates the amount of pressure resulting in an electron degeneracy. Which makes the helium flash, that can reach upward of 100mk in the core. The helium then becomes fuse together. With this process creates a supernova, which is created a neutron star which has three components. One the massive star is dense and has a hot core, second a supernova explosion blows off the outer layers. And finally the supernova expands forever. After this process the mass of the core is classified into three size groups. A white dwarf which is anything larger than 1.4. A Neutron star which is anything larger than 3.0. And lastly anything smaller than 3.0 gravity overcomes with the degenerate pressure. In class we did a lecture tutorial tilted “Stellar Evolution”. In this tutorial we learned which path a star can go after becoming a red giant. If it has a mass of 8Ms or smaller, it becomes a planetary nebula leaving behind a white dwarf. Also it is larger then 8Ms it becomes a type two supernova leaving behind either a neutral star or black hole. This is what happens when stars evolve and die within space.

This article relates to what we did in class because it tells us the story of how stars are dying and evolving. After learning about stars  are evolving and dyeing in class. It opened my eyes to what is truly going on in space. It may seem like stars does not do anything when you look up at the night sky. But after learning about them they are almost like a living creature. Being able to grow, expand, and eventually dieing and leaving behind ver few things.


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