GALEX Blue Ring Nebula model

November 18, 2020
by
TheBadAstronomer
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GALEX Blue Ring Nebula model

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A thousand years ago, two huge thick-shelled cones of gas were expelled from the star TYC 2597-735-1, with one headed toward us and the other away. The shells are cold molecular gas that glows in the UV, and the open ends glow red as hydrogen gas hits the thin material between stars. This animation starts with observations of the object, then fades into a model of the open cones which spins around to show the true geometry. The blue ring we see is actually where we see the cones overlap.

\r\rThere’s a funny illusion that you may experience watching this where, as the structure rotates, it looks like the cones are suddenly moving in opposite directions. Our brains have a hard time interpreting symmetric structures like this and can be fooled that way. Another example of this that makes ...

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