Re: APOD: M15: Dense Globular Star Cluster (2018 Oct 17)
Posted: Fri Oct 19, 2018 6:26 pm
And you can bet your anti-gravity boots they're working hard on Time Travel while they're at it.
APOD and General Astronomy Discussion Forum
https://asterisk.apod.com/
`Then you should say what you mean,’ the March Hare went on.BDanielMayfield wrote: ↑Fri Oct 19, 2018 3:29 pmSome, but not nearly as much as when our solar system formed. M15's metal content is now found to be -2.37 dec, or only 10^-2.37 = 0.00427 times the sun's value. My inference would be that it might well have been much harder for rocky planets to have formed out of material so thinly enriched with metals. It takes a lot of rocks to make rocky planets. Bruceneufer wrote: ↑Fri Oct 19, 2018 3:12 amThere wasn't hardly any heavy elements yetBDanielMayfield wrote: ↑Thu Oct 18, 2018 9:29 pm
An additional problem with having planets in and around globulars would be the extremely low metal content of the material that created these star systems. Way back when these star systems were forming there wasn't hardly any heavy elements yet, so forming rocky planets would have been much harder.
And that matters why? Even conventional encryption methods are not practically breakable now. Adding another isn't going to change much.coffeesippin wrote: ↑Fri Oct 19, 2018 6:24 pm I hope the NASA National Security Advisors are more up to date than a couple of participants here .. the Chinese are set to get non-local communication going soon. https://www.sciencemag.org/news/2017/06 ... d-distance
You reference an article that reports that photons have been quantum-entangled and then sent far apart and remained entangled. I don't see how this could ever help someone transmit information faster than the speed of light.coffeesippin wrote: ↑Fri Oct 19, 2018 6:24 pm I hope the NASA National Security Advisors are more up to date than a couple of participants here .. the Chinese are set to get non-local communication going soon. https://www.sciencemag.org/news/2017/06 ... d-distance
Indeed. Quantum entanglement provides opportunities for perfect encryption, but it does not violate the constraint on how fast information can be transmitted. It does not allow faster than light communications.MarkBour wrote: ↑Sat Oct 20, 2018 11:59 pmYou quote an article that reports that photons have been quantum-entangled and then sent far apart and remained entangled. I don't see how this could ever help someone transmit information faster than the speed of light.coffeesippin wrote: ↑Fri Oct 19, 2018 6:24 pm I hope the NASA National Security Advisors are more up to date than a couple of participants here .. the Chinese are set to get non-local communication going soon. https://www.sciencemag.org/news/2017/06 ... d-distance
Well, there's no telling what those National Security Advisors at NASA are doing. They are a pretty secretive bunch of people. In fact, I'm not sure how coffesippin even knows about them.Chris Peterson wrote: ↑Sun Oct 21, 2018 12:12 amIndeed. Quantum entanglement provides opportunities for perfect encryption, but it does not violate the constraint on how fast information can be transmitted. It does not allow faster than light communications.MarkBour wrote: ↑Sat Oct 20, 2018 11:59 pmYou quote an article that reports that photons have been quantum-entangled and then sent far apart and remained entangled. I don't see how this could ever help someone transmit information faster than the speed of light.coffeesippin wrote: ↑Fri Oct 19, 2018 6:24 pm I hope the NASA National Security Advisors are more up to date than a couple of participants here .. the Chinese are set to get non-local communication going soon. https://www.sciencemag.org/news/2017/06 ... d-distance