p1t1o

Saw this very cool music video and wanted to share it, so lets share lots of very cool music videos

As far as I know, current science has gravity in all its forms travelling at c. But mixing in gravity with relativity, special relativity and quantum weirdness is definitely where things start to get sticky. Google "quantum gravity" and see how far down the rabbit hole you can make it <bit'o'googlin'> The speed of gravity has been measured: "As Jupiter moved between Earth and the quasar, the gravitational bending of Jupiter allowed us to measure the speed of gravity, ruling out an infinite speed and determining that the speed of gravity was between 2.55 × 10^8 and 3.81 × 10^8 meters-per-second, completely consistent with Einstein's predictions." **edit** This might also have been one of the things that has been firmed-up by observing that black hole merger a little while back: https://en.wikipedia.org/wiki/Speed_of_gravity

Time is RELATIVE. If it ever seems like something ought to be travelling >c, adjust the flow of time in the relevant frames of reference to taste and you will find you fall into line with theory very quickly.

Correct

For a split second around 00:25 you see the full profile of the missile after the fins deploy, definitely a Brahmos/P-800 (essentially the same thing, probably impossible to differentiate visually without a flag being painted on something)

I've had this before where I've rewatched a movie from a while ago, and Ill get to one scene and be like "Thats weird, it happened differently last time I watched this" like a different line in the dialogue or something. Apparently memory is quite variable and not terribly reliable. Basically every time you recall a memory, its different. Maybe you heard someone say "88.8mph" at some point in your life and your brain sewed it into a memory of actually watching the movie, or almost any other similar confluence of events.

Copying in @Green Baron Found it, its a sail. A"photonic thruster" is a photon sail concept, where the photons are reflected back and forth between stationary start point and the "thruster" itself. Photon sails have their advantages, but also disadvantages.

Unfortunately the laws of physics means that you need 300MW per Newton, and no amount of fancy new materials or research can improve that due to conservation laws. The equation boils down to a very simple form: Power = Force * c Watts = 1N * c = 300,000,000W/N source: http://www.projectrho.com/public_html/rocket/enginelist.php#photon Which is confusing because 14mN from 500W is only 35.7kW/N... (and I think with that ratio, you could do a HECK of a lot already) What am I missing? But I just screwed up my decimal points in a previous calculation, so Im not really sure of anything anymore.

Yes, thats the figure I showed as well. However, I have made a mistake and a few times have said 0.1c instead of 0.01c (referring to 3000km/s), thats embarrassing , taints all my cool points!! @Green Baron maybe thats where your factor of ten came from (with the 2.72 result)?

I've just noticed that - though it seems like an obvious thing, you dont often see the numbers: if we "merely" double the above exhaust velocity from 0.1c to 0.2c, we can reduce the required reaction mass (to accelerate 1t to 0.2c) from 1billion tons...to 1ton.

lol I have recently been doing some work with the Istituto Superiori di Sanita (https://www.iss.it/)

If you stare at the pic long enough, it turns into a creepy smiley face, half shrouded in shadow....watching your demise. Yeah you dont think your demise is happening? Thats what is making it smile

Do we know that it is a water cloud?

A town in Norway named: (pronounced "Aw" like in "Awful")

Welcome to the party pal! Project Pluto comes up on here quite often, and yes, it is ultra cool. Some extra FunFacts: Cruising at Mach 3 at low altitude, it would have glowed cherry-red. It was cancelled for being "destabilising", that is, it was such a powerful weapon system that if put into produciton, would have risked starting WW3 simply by existing. (Adversary would be encouraged to launch a first strike as once the Pluto's went up, they would have been impossible to stop [at the time]) The ceramic fuel inserts for the reactor were made by Coors - yes the beer company. It actually makes sense as they had (have?) a large glass-handling plant for production of beer bottles, and I guess they had the expertise to make whatever ceramic component Pluto needed. The nuclear ramjet was built and tested full-scale: Those rows of things? Those are compressed air cylinders, connected in parallel, so that Mach 3 airflow could be provided to the intake for about 1minute.

Oh its not an app to make things difficult, its literally my phones default thing and you just swipe right straight off the front screen. But Im not sure I even understand the concept of "an icon" when Im still in boot-up. But my fiance does (she just like WAKES up, how do people DO that?!) and she a much lighter sleeper, so sometimes shes shouting "TURN IT OFF TURN IT OFF" and she pushing my phone into my hands and shes shouting and my phone is blaring some saccharine tweetle-twotter at max volume and Im pawing at my phone feebly, trying to figure out what the noises coming out of my finace's mouth mean. Life's a wild ride sometimes.

https://www.merriam-webster.com/dictionary/hangry

I like the idea that there might be countless billions of alternate universes where the only difference is the precise configuration of the twisted paperclip on my desk.

Lorentz factor at 0.2c is almost negligible (about 1.02), the figures should be ok? Lorentz factor doesnt even hit 1.1 until you get to 0.4c but starts to rise rapidly soon after that. Ref: https://www.fxsolver.com/solve/ https://www.fxsolver.com/browse/formulas/Lorentz+Factor

<tappity tappity tap tap on a calculator> So....to accelerate 1t to 0.2c with a much more manageable, mere 1billion tons of reaction mass, the exhaust velocity needs to be around 3000km/s or 0.1c 0.01c (god-DAMNit!) So in order to make an object reach relativistic speeds, we need to be able to make matter reach...relativistic speeds. Who doesnt love a bit of circular logic ****** edit: 0.01c not 0.1c, so the "relativistic" exhaust velocity is somewhat more underwhelming now, but you only need to tweak the numbers slightly to reveal the point I was getting at.

I think it comes down to resources and priorities. For a hardcore flight sim, a great deal of coding is required to simulate the realistic avionics and flight model, which takes time (and obviously, money) away from developing graphics or terrain. This is not the case with space sims or other non-real-world titles, where the "avionics" and "flight model" are, comparatively, extremely rudimentary. Having said that, DCS has released some new terrains, but I havnt got them so dont know exactly where they come on a quality scale (other than they are at least as good as default DCS terrain, probably a bit uprated) I'll go on record to say that the actual aircraft in DCS, are the highest quality graphical objects I have seen in ANY game, but then I am a bit of a DCS fanboy

On myphone, I swipe an icon to the right to turn off the alarm. Unfortunately, in my 70%-still-asleep state that I am in for the first few mins of waking up, I find this an impossibly difficult task. Its so weird that you can be awake but, like, not fully awake, trying to operate with severely compromised faculties. ***edit*** Holy poop! I read this short story last week (Edgar Allen Poe, about being buried alive): https://poestories.com/read/premature ...and it contains this passage: "Apart from the tendency to trance, however, my general health appeared to be good; nor could I perceive that it was at all affected by the one prevalent malady -- unless, indeed, an idiosyncrasy in my ordinary sleep may be looked upon as superinduced. Upon awaking from slumber, I could never gain, at once, thorough possession of my senses, and always remained, for many minutes, in much bewilderment and perplexity; -- the mental faculties in general, but the memory in especial, being in a condition of absolute abeyance." Weird huh?

What is the reduction if you, say, double exhaust velocity?

What you refer to as "the multiverse theory" is actually called "the many worlds interpretation". It does NOT simply state that "anything and everything you can possibly concieve and anything and everything that you cant possibly concieve, literally exists in reality somewhere" What it states - or more accurately, IMPLIES - is that "all POSSIBLE timelines exist" Ergo, if a timeline is IMpossible, it need not be present in a multiverse. And I would have thought that the paradox you mention above, is exactly that. It also does not stipulate that there must be infinite universes, there may be a limit (in fact there is universal doubt surrounding infinity as a concept and if it can really exist in reality under ANY context). And if there is a limit, then there must be things left out of the multiverse, things which do not happen anywhere. The many worlds interpretation is NOT a "theory", its nowhere near that solid. Its much closer to being a thought exercise, like the rubber sheet analogy for distortion of space by gravity, which in fact, breaks down if translated literally into the real world (ie: space/time is not really a stretchy sheet).

Are you sure...I dont think so...both are still in active development. If you mean the starting core engine code, maybe, but what matters is "does it do what you are looking for?" What is it that you are looking for? Just smoother framerates? Higher detail? I think less "niche" than we are "demanding"