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The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way.
bymedv4380 ( 1604309 ) writes:
but doesn't it correlate to any possible event yet, or are we just guessing about were it came from?
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byPhxBlue ( 562201 ) writes:
If it's a supernova event, hopefully we'll spot it in the next day or two.
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byfemtobyte ( 710429 ) writes:
Actually, neutrinos do arrive slightly faster than light from supernovae. Space isn't completely empty --- tiny amounts of interstellar gas give it a refractive index slightly higher than "perfect" vacuum, which ever-so-slightly slows down light. Neutrinos interact far less than light with matter; so, a supernova neutrino going at very nearly the speed of light can outrun a photon through space. In Supernova 1987A [wikipedia.org], neutrino detectors saw neutrinos about three hours before light reached earth's telescopes.
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byAnonymous Coward writes:
Actually, neutrinos do arrive slightly faster than light from supernovae. Space isn't completely empty --- tiny amounts of interstellar gas give it a refractive index slightly higher than "perfect" vacuum, which ever-so-slightly slows down light.
While I'm sure that effect plays a part, the more obvious reason is that a supernova releases a burst of neutrinos long before the light produced can escape.
byTheInternetGuy ( 2006682 ) writes:
Actually, neutrinos do arrive slightly faster than light from supernovae. Space isn't completely empty --- tiny amounts of interstellar gas give it a refractive index slightly higher than "perfect" vacuum, which ever-so-slightly slows down light. Neutrinos interact far less than light with matter; so, a supernova neutrino going at very nearly the speed of light can outrun a photon through space. In Supernova 1987A [wikipedia.org], neutrino detectors saw neutrinos about three hours before light reached earth's telescopes.
Very informative, thank you. (No mod points today)
byAnonymous Coward writes:
The neutrinos arrived before the light, because the neutrinos come directly from the centre of the collapsing star and the photons came from the surface once the shockwave arrived there. The difference is not due to the interstellar medium. Which is of course also written in the wikipedia article you linked.
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