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Warp Drives and Negative Energy: Physicists Give Chances of Faster-Than-Light Space Travel a Boost
https://scitechdaily.com ^ | MAY 16, 2021 | By MARIO BORUNDA, OKLAHOMA STATE UNIVERSITY

Posted on 05/18/2021 12:11:52 PM PDT by Red Badger

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To: discostu

Military first, then hand-me-downs to police later?


41 posted on 05/18/2021 1:16:42 PM PDT by Ozark Tom
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To: ProtectOurFreedom

Flying cars. Get yours here: https://www.ehang.com/ehangaav/

Warp drives, well, the physics hasn’t gotten much past the point of hopeful misunderstandings.


42 posted on 05/18/2021 1:17:01 PM PDT by ctdonath2 (All worry about monsters that'll eat our face, but it's our job to ask why it wants to eat our face.)
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To: Renfrew
I feel there has to be some method of FTL travel that is possible.

It's called, "Ludacris Speed."
43 posted on 05/18/2021 1:17:04 PM PDT by RandallFlagg ("Okay. As long as the paperwork is clean, you boys can do what you like out there." -Fifi)
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To: Red Badger
Bobrick and Martire realized that by modifying spacetime within the bubble in a certain way, they could remove the need to use negative energy

I wonder what these guys talk about in the bar after bowling on Friday nights?

44 posted on 05/18/2021 1:17:40 PM PDT by Hot Tabasco
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To: Boogieman

Relativity gives me a headache.

You can only measure velocity relative to some other object, not relative to empty space itself, and you cannot move faster than the speed of light relative to any other object. So if you launch two spacecraft, each going 90% of the speed of light relative to you but in opposite directions, how fast are they going relative to each other?

I know there is a mathematical formula to calculate it (which is far beyond my recollection of my 40 year old college calculus and physics classes), but conceptually it makes my head hurt.


45 posted on 05/18/2021 1:22:49 PM PDT by kennedy (No relation to those other Kennedys.)
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To: Dutch Boy

There are lots of discussions about building spaceships which accelerate at just one G (or less), and approach light speed in a reasonable time. Problem seems how much fuel is required to maintain that acceleration that long; remember, it takes rockets a starting load of around a million pounds of fuel just to push a few G for a few minutes. After that first push, spacecraft just coast (taking clever advantage of orbital/gravity mechanics for further acceleration).


46 posted on 05/18/2021 1:25:34 PM PDT by ctdonath2 (All worry about monsters that'll eat our face, but it's our job to ask why it wants to eat our face.)
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To: Ozark Tom

Military would have no use for them. Your problem with a flying car is it’s a worst of both worlds scenario. In car mode you’re going to have these inconvenient wings to deal with, so either your vehicle will have a huge footprint or you’ll have to fold them up like the worst rag top ever. Either way they’ll add weight and drag. As a plane because the car body isn’t aerodynamic in the right way your lift will be limited and its carrying capacity will be low. Then of course you gotta find room for all that gearing to have the engine either turning wheels relatively slowly or a propeller really fast. That will take up space and weight. Rich collectors of oddities would be about the only market for the crappy plane/car.


47 posted on 05/18/2021 1:29:48 PM PDT by discostu (Like a dog being shown a card trick )
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To: ctdonath2

“Problem seems how much fuel is required to maintain that acceleration that long”

With our current understanding of physics the best way to get to the stars would be an array of solar powered lasers on the moon. They would be focused on light sails of a space craft. The craft could then steadily accelerate to a significant portion of light speed.


48 posted on 05/18/2021 1:39:42 PM PDT by Renfrew
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To: Renfrew
Otherwise why would everything out there exist?

More importantly, why do you exist?

49 posted on 05/18/2021 1:42:24 PM PDT by itsahoot (The election was stolen and there isn't a dang thang you can do about it. )
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To: NobleFree

Yes, he most certainly did. I believe he stated it in one of his New York Times articles, which they like to lock up behind a paywall, but I’ll try to find a link to it for you when I get a chance.

You may be confused because of course he talks about “length contraction”, but there is a very good reason that although he called the correlating effect “time dilation”, he did not use the term “space contraction”, but rather “length contraction” instead. That was a very deliberate choice on Einstein’s part.


50 posted on 05/18/2021 1:42:34 PM PDT by Boogieman
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To: Red Badger
Alcubierre estimated that a warp drive with a 100-meter bubble would require the mass of the entire visible universe.

No problemo. All you have to do is steal it from neighboring universes. But you can't just take big bites out of people's universes without making a lot of enemies. So be prepared for that.

51 posted on 05/18/2021 1:48:34 PM PDT by LibWhacker
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To: Boogieman

Bingo! This planet has spawned a bunch slugs compared to the intelligence needed to engage beings in other parts of the universe, should they exist.


52 posted on 05/18/2021 1:50:53 PM PDT by SgtHooper (If you remember the 60's, YOU WEREN'T THERE!)
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To: Red Badger
The author forgot about the Infinite Improbability Drive.

-PJ

53 posted on 05/18/2021 1:51:20 PM PDT by Political Junkie Too (* LAAP = Left-wing Activist Agitprop Press (formerly known as the MSM))
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To: Renfrew

Eventually, you’ll need to slow down and stop.


54 posted on 05/18/2021 1:54:21 PM PDT by SgtHooper (If you remember the 60's, YOU WEREN'T THERE!)
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To: SgtHooper

Correct, that is the big unsolved problem. The good news is once you launch you will have several years to figure that part out.


55 posted on 05/18/2021 1:57:10 PM PDT by Renfrew
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To: NobleFree
“he also agreed with you that space itself is not a physical thing that could be warped or compressed.”

------No he didn’t.

Well considering it was all at one time smaller than a BB wouldn't that be compressed and what it is now, be expanded? Where was space then since it wasn't needed?

56 posted on 05/18/2021 1:57:30 PM PDT by itsahoot (The election was stolen and there isn't a dang thang you can do about it. )
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To: Red Badger

There is a really cool freeware program out there called “Celestia” that allows you to travel around the universe with your computer. It is most excellent, though of late there seems to have been little development on the project. You really do not have any idea how freaking huge the universe is, until you start traveling around it, even going at hyperluminal speeds.

I did some experiments were I set it up to travel to one of the nearer stars at 1AU/sec. That is an insane speed, but it still took weeks.

Celestia is HIGHLY recommended for anyone with kids.


57 posted on 05/18/2021 2:00:56 PM PDT by zeugma (Stop deluding yourself that America is still a free country.)
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To: Renfrew

Light sails are interesting, but precision is presumed problematic.


58 posted on 05/18/2021 2:01:00 PM PDT by ctdonath2 (All worry about monsters that'll eat our face, but it's our job to ask why it wants to eat our face.)
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To: Boogieman

“So if spacetime is just a combination of time and space, and the space itself cannot be warped, then that only leaves the time element. That is the thing that is actually being warped to produce the effect we see as gravity. Gravity is an effect of warped time, not warped space.”

This is absolutely false. The three dimensions of length are altered by gravity just as surely as the fourth dimension of time; in special and general relativity, the only difference between length and time is their opposite signs in the distance metric.


59 posted on 05/18/2021 2:03:18 PM PDT by NobleFree ("law is often but the tyrant's will, and always so when it violates the right of an individual")
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To: Red Badger

Couple this with all the UFO stuff leaking out and I’d bet a big reveal is on the way.


60 posted on 05/18/2021 2:12:29 PM PDT by Georgia Girl 2 (The only purpose of a pistol is to fight your way back to the rifle you should never have dropped)
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