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Comment: Re:Gravity Waves (Score 1) 383

by KasperMeerts (#28312963) Attached to: Could Betelgeuse Go Boom?

p>But a serious question: Over distance, wouldn't the visible light catch up to the neutrinos?

Sure, but over what distances are we speaking here? A neutrino created in a supernova would go about a trillionth of a meter per second slower than light, so even if they did a race across the universe( 80 billion lightyears), the neutrino would only be 60 km behind!

Comment: Re:Gravity Waves (Score 2, Interesting) 383

by KasperMeerts (#28307455) Attached to: Could Betelgeuse Go Boom?

The fact that light from the core takes a lot more time to reach the surface than from the surface to the earth has a completely different reason.

In fact, neutrinos aren't massless which means they are slower than light. The only reason the neutrinos arrived first is because of the way supernovas work. The neutrinos get emitted as soon as the core collapses but the first visible light only appears as soon as the shockwave from the collapse gets to the surface.

Disclaimer: I'm not yet an astrophysicist, but I did ace my cosmology exam yesterday

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