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How Long Has It Been Since We Saw A Supernova?
Forbes ^
| 12/31/2019
| Kiona N. Smith
Posted on 01/04/2020 8:50:56 PM PST by BenLurkin
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1
posted on
01/04/2020 8:50:56 PM PST
by
BenLurkin
To: BenLurkin
Now wait a second here. If nothing can go faster than light, then how did those neutrinos get here before the light did?
To: ProtectOurFreedom
They took the express lane.
3
posted on
01/04/2020 8:57:17 PM PST
by
RandallFlagg
(Fact: Gun control laws kill innocents.)
To: RandallFlagg
Wow, what was the FastTrack fee for that? Those little buggers must be loaded.
To: RandallFlagg
5
posted on
01/04/2020 9:01:03 PM PST
by
Equine1952
((You can die on your feet or live down on your knees. You can not do both. Freedom Is not Free))
To: ProtectOurFreedom
Pulses of neutrinos released before the “explosion” Just a guess I don’t know what kind of convulsions a collapsing star goes through. The electromagnetic spectrum is much more than visible light.
6
posted on
01/04/2020 9:03:12 PM PST
by
gundog
( Hail to the Chief, bitches!)
To: ProtectOurFreedom
Along with the last light from before the star exploded.
7
posted on
01/04/2020 9:03:26 PM PST
by
BenLurkin
(The above is not a statement of fact. It is either opinion or satire. Or both.)
To: ProtectOurFreedom
They didn't. Neutrinos have almost no mass, so they travel extremely close to the speed of light.
8
posted on
01/04/2020 9:03:49 PM PST
by
Widget Jr
To: BenLurkin
There was a good episode back in the 70s...
Sorry.
9
posted on
01/04/2020 9:04:41 PM PST
by
dp0622
(Radicals, racists Don't point fingers at me I'm a small town white boy Just tryin' to make ends meet)
To: BenLurkin
?
10
posted on
01/04/2020 9:08:30 PM PST
by
Salamander
(Living On The Ledge....)
To: ProtectOurFreedom
Because they proceeded directly from the core at the moment of collapse, without getting absorbed or scattered by the outer layers of the star, without passing Go!, and without collecting $200. But photons are heavily scattered inside the star, and the expanding shock wave of pressure itself travels much slower than the speed of light, and has to reach the surface of the star before one sees it. (By which time the neutrinos are long gone.)
If you put a blasting cap inside the middle of a large sphere of explosive, you won’t see it the moment the cap goes off, but only when the shock makes it to the outside surface. But, supposing that blasting caps also made neutrinos (they don’t), the neutrinos would leave at the speed of light, and you’d see those first.
11
posted on
01/04/2020 9:09:35 PM PST
by
coloradan
(The Enemy Media isn't chartered to inform but rather to advance the interests of certain elites.)
To: ProtectOurFreedom
Now wait a second here. If nothing can go faster than light, then how did those neutrinos get here before the light did?
They were probably released by the dying star prior to the final explosion - presumably as part of its final death throes.
To: BenLurkin; Gamecock; SaveFerris
“preceded a few hours earlier by a series of neutrino bursts”
Aren’t neutrinos a kind of sable?
Comment #14 Removed by Moderator
To: Salamander
To: BenLurkin
Ask Sulu. He’s not afraid of them.
16
posted on
01/04/2020 9:16:35 PM PST
by
headstamp 2
(There's a stairway to heaven, but there's a highway to hell.)
To: BenLurkin
Something that “May have” happened 650 years ago is now something that Greta “May” be concerned about now and I may be blamed for?
HOW DARE YOU!
17
posted on
01/04/2020 9:17:08 PM PST
by
TexasTransplant
(Damn the Torpedoes! Full Speed Ahead!)
To: Larry Lucido
[[Arent neutrinos a kind of sable?]]
You are thinking of a purina.
18
posted on
01/04/2020 9:18:29 PM PST
by
headstamp 2
(There's a stairway to heaven, but there's a highway to hell.)
To: Widget Jr
The article says they beat the light getting here.
To: ProtectOurFreedom
Now wait a second here. If nothing can go faster than light, then how did those neutrinos get here before the light did? The neutrinos are emitted right when the nuclear reactions go out of control in the core. The rest of the star is transparent to neutrinos so they escape immediately.
The light has to propagate through the mass of the body, most of which is opaque so it aborbs light and then reemits it. That takes time. In the sun I've seen estimates of thousands to millions of years for a photon to get from the core to the surface. During a supernova it takes less time because the driving force is the explosion's compression wave destroying the star which can take hours.
In a supernova, why do we detect neutrinos before light?
20
posted on
01/04/2020 9:20:41 PM PST
by
KarlInOhio
(Cutest internet video: Charlie bit my finger. Creepiest internet video: Joe Biden bit my finger.)
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