will the world end?

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there is so many theroies saying the world will end. some say a solor flare so high from the sun it will burn the earth. also a huge meterite is expected to hit. and eventually this will happen sooner or later but the sun will expand into a red giant and reach futher than earths orbit and if earth some how DOES survive the sun will shrink into a white dwarf and eventually wont be able to warm thus killing everything on the earth. how do you think the world will end and why?