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A dead star's dusty ring.(Spitzer Space Telescope finds dead star )
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In 5 billion years, the sun will swell into a huge ball that will fry Earth or even swallow it up. Our star's outer layers will then fly off, and its core will shrink into a dense, fading object called a white dwarf.
Then what? New images of a dead star are giving scientists a glimpse of what might happen to our solar system when its time comes.
[ILLUSTRATION OMITTED]
The observations come from the Spitzer Space Telescope, which recently focused on a huge, eye-shaped cloud of gas and dust called the Helix nebula, 700 light-years from Earth.
The Helix nebula ...
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