1

Physics, Astronomy & Cosmology / Re: How does rocket thrust work in the vacuum of space?

« on: 15/09/2020 01:06:30 »

Cool ; the thread "Can an Impulse-Engine be built ?" (74724.0) , is located in the New-Theories section . 
Also ; my post #1 in thread :
quora.com/How-can-rocket-fuel-be-changed-in-the-future/
P.M.

2

Physics, Astronomy & Cosmology / Re: How does rocket thrust work in the vacuum of space?

« on: 13/09/2020 16:04:16 »

I believe that you just hurt Doc Brown's (Professor Woodward) feelings !   .

》Prof. James Woodward , developer of the Mach-Effect Megadrive R-D .

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Physics, Astronomy & Cosmology / Re: How does rocket thrust work in the vacuum of space?

« on: 13/09/2020 11:18:15 »

My reference is to rockets proper , as discussed in Reply # 1 . An Impulse-Engine is another term for a reaction-engine , true , but is generally applied to space-based derivations .
*All of this has been discussed in depth with Mr. Kryptid and Bored Chemist , in my thread : Can an Impulse-Engine be built ?
> Note : The primary discussion there is about matter-ejecting engines, not R-Ds. However , I am still waiting for clear access to bring the "Red-shift of reflected light" thread back to life , in order to refine my latest engine concept with optical-physics aces who posted there . I think that trumps any pride involved here .
P.M..

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Physics, Astronomy & Cosmology / Re: How does rocket thrust work in the vacuum of space?

« on: 13/09/2020 02:18:58 »

Except that that would not give me the discussion with Mr. Romaniuk et al , that I was hoping for .
*Listening to myself yak just isn't the same , it's kind of like being pushed to the back of the bus !  .🤨

5

Physics, Astronomy & Cosmology / Re: How does rocket thrust work in the vacuum of space?

« on: 13/09/2020 01:29:08 »

Fair enough , mahn !  .

*You know that I was looking to rejuvenate this thread by starting a discussion of whether an Impulse-Engine is a rocket , but... I have to worry about someone objecting to that , so... best not to .  .

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Physics, Astronomy & Cosmology / Re: How does rocket thrust work in the vacuum of space?

« on: 13/09/2020 00:24:21 »

Actually , it's not the flame-front , it's the shockwave that goes supersonic .
P.M.  .😎

7

New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 08/07/2020 19:26:49 »

I would define infinite universes , living and dying eternally , as a multiverse .
P.M.

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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 01/07/2020 03:08:47 »

The energy bit is one thing , the other two will be a while .  .🤔

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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 30/06/2020 12:13:50 »

I 'spec the universe has an actual size , just far beyond our ability to observe .
I also expect that the universe will end at some point , but not the multiverse .
Finally , there's only so much energy in the 'verse , so... ratio .
👽

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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 30/06/2020 03:02:29 »

Sounds tricky ! 
Personally , I have a hard time believing in extant infinities .  .🤔

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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 30/06/2020 02:07:20 »

That make Entropy awful angry !  .🤨

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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 29/06/2020 05:05:29 »

That sounds like a perpetual-motion machine .
How's about "Each universe is a raindrop  , in an eternal rainstorm ." ? 
🤔

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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 28/06/2020 03:18:07 »

A "Crunchy-Roll" universe ?
Naah , I prefer an explicable process , even if it currently exceeds our grasp ! .🤔

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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 28/06/2020 00:56:23 »

...Bwaa-Haha-Haha...
I'm flattered !  .😅

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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 27/06/2020 22:26:14 »

So , it's infinitely relative !  .🤓

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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 23/06/2020 04:02:25 »

I'm a "Big-Rip" kinda guy , myself .
I think that whatever cycles are involved , are far grander than what you've referred to .
😬

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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 23/06/2020 02:08:55 »

Yeah but ...
Just like people , it develops , changes , and has a life-cycle .
A plasma-sea is not a spiral galaxy , for instance .
Perhaps the deep-past and deep-future had/will have very different physics than at present .
Maybe the multiverse ingests universes , and/or their energy .
It could take millions of years to answer these questions , then there'll be more .
Au revoir , Oz !
P.M.

18

New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 22/06/2020 22:12:40 »

Yah , it's right up there with that eternal injection of space, that we call "inflation"!
Well , Tommy can hear you !
P.M.  .

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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 22/06/2020 21:14:38 »

"Bogey at two o'clock !
Sorry , I just had to say that , at least once in my existence !
As to the thread subject ; I doubt that Mr. Lerner would claim to have a bead on the "Prime-Mover" , anymore than advocates of the Big-Bang Theory (or the TV. show).
I personally like the Big-Heat theory , where the universe had space first , then the ungodly-huge energy was injected in . However , there definitely could have been an intermediate plasma-state . It's possible that in future , some new math or observational evidence will become extant , but for now , we are the "...deaf , dumb , and blind kids..." !
Toodles , and watch your six !

P.M.

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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?

« on: 09/06/2020 17:23:17 »

*You sound like the Fusion-Chief !
https://en.m.wikipedia.org/wiki/Eric_Lerner   
》Indirect evidence ?
www.universetoday.com/143140/astronomers-uncover-dozens-of-previously-unknown--ancient-and-massive-galaxies/amp/ 
P.M.  .