5 ms·
>Modern astronomers now consider its distance from Earth to be about 7,200 light-years or 2,200 parsecs. >SN 1006 lies well beyond 1 kiloparsec, and it did not
by asicsp 3y ago
>Modern astronomers now consider its distance from Earth to be about 7,200 light-years or 2,200 parsecs.
>SN 1006 lies well beyond 1 kiloparsec, and it did not appear to have significant effects on Earth. However, a signal of its outburst can be found in nitrate deposits in Antarctic ice.
Something from 7200 light years had an effect on Earth!
- throwbadubadu 3y agoAnd at below 160 light years it could already show damaging effects (earthsky.org)
- rnk 3y agoI searched there and found this interesting article https://earthsky.org/astronomy-essentials/safe-distance-from-a-supernova-earth/ https://earthsky.org/astronomy-essentials/safe-distance-from...
- qubex 3y agoThis is part of why I laugh like crazy whenever in Star Trek something is presented as being an instantaneous existential threat to the whole galaxy.
- Physkal 3y agochuckles at the thought of Star Trek: Generations 7200 year runtime.
- poszlem 3y agoIn a world with faster than light drive, isn't that a possibility, though?
- heinrich5991 3y agoFaster-than-light travel is basically ruled out by our current understanding of physics, AFAICT.
- trey-jones 3y agoKeeping an open mind about it, our understanding of physics is based on light-enabled observations, so if there is something that moves faster than light, we wouldn't be able to detect it anyway, yes?
- simonh 3y agoIf it can have causal effects then we can detect it. If it can't, who cares.
- AnimalMuppet 3y agoIf there was something that moved faster than light, that still interacted with regular matter in some way, then yes, we would be able to detect it by the effects.
- roywiggins 3y agoYou can hear things that are going faster than the speed of sound, so I don't see why something that is outrunning its own light would be invisible. You wouldn't see it coming, but you would see it leaving. If it's not transparent then you'd see its shadow, if it smashed its way through a planet you'd see the hole, etc.
- lloeki 3y agoYou would actually see it departing both forward and backwards. https://en.m.wikipedia.org/wiki/Tachyon https://en.m.wikipedia.org/wiki/Tachyon
- Retric 3y agoFTL is baked in to the expansion of the universe. Just not in a useful way so you can’t get somewhere faster than light could.
- Tagbert 3y agothere is the proposed Alcubierre drive that would allow you to get from point A to point B faster than light. The reason is that you are not traveling through space-time but you are causing space-time to move. It is a clever way around "the rules" but it does require some exotic (and unproven) concepts like negative energy to work. It even sounds like a "warp drive". https://en.wikipedia.org/wiki/Alcubierre_drive https://en.wikipedia.org/wiki/Alcubierre_drive
- qubex 3y agoWell yes and no… though there’s a deliberate faster-than-light mode of travel, we see no evidence of natural disaster phenomena propagating faster than the speed of light (obviously), so… let’s say that this places the absurdity of the notion into perspective.
- moffkalast 3y agoIf you mean in ST specifically, there are plot phenomena propagating at warp speeds on numerous occasions. That ENT episode comes to mind: > Enterprise is hailed by a trio of aliens, who warn that a deadly neutronic wavefront, many light years across, is approaching at a speed close to warp 7. Since the ship is capable of only warp 5 and cannot outrun the storm, everyone must shelter in order to survive the storm's radiation. https://en.wikipedia.org/wiki/The_Catwalk https://en.wikipedia.org/wiki/The_Catwalk Also the plot speed radio of course: > By transmission of a subspace radio signal, which travelled through subspace rather than normal space, subspace communication permitted the sending of data and messages across interstellar distances faster than the speed of light. https://memory-alpha.fandom.com/wiki/Subspace_communication https://memory-alpha.fandom.com/wiki/Subspace_communication
- qubex 3y agoYeah… I’m a trekker… but stuff like this really riles me up… ‘neutronic’ radiation sounds a lot like neutron radiation, and neutrons are massive and cannot travel at the speed of light far less exceed it.
- moffkalast 3y agoClearly an omega molecule has pushed the neutrons' mass out of phase and the released chroniton particles resulted in the neutrons experiencing no passage of time. It's just basic warp theory :P
- qubex 3y agoI say we use the hallowed Navigational Deflector to emit a tachyon pulse.
- mseepgood 3y agoIt had an effect on the astrologers/astronomers who observed and recorded it. While doing that they didn't make love with their wives, and the ancestor of a person who would have killed Hitler was not conceived.
- malfist 3y agoHow do you Godwin in the second comment on an astronomy thread?
- deleted 3y ago[deleted]