Thursday, February 9, 2012

How do you get a star like Altair to spin at nearly 1% the speed of light?

Altair's observed rotation is about 11 hours, as opposed to Sol's rotational period of about a month. Given that Altair is a larger star than Sol (our sun), how do you impart a rotation on a body that size without destroying it?How do you get a star like Altair to spin at nearly 1% the speed of light?Altair must have been formed from a gas cloud that was spinning. Because angular momentum is conserved, a moderately fast moving cloud of dust could create a star that has an outlandish speed of rotation.



Edit: Think of spinning around on a chair with your arms out, and then pulling them in. It's the same idea.

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