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Thread: UFOs: Threat or Menace?

  1. #136
    Senior Member Baron Scarpia's Avatar
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    Quote Originally Posted by Luchesi View Post
    And if you fell into a black hole you'd realize that the computations of all that, couldn't keep up.

    If you got run over by a bus, you'd continue to be 'sentient' as a simulated ghost.
    You'll forgive me if I leave it to you to test that theory.

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  3. #137
    Senior Member Jacck's Avatar
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  5. #138
    Senior Member Luchesi's Avatar
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    I only started space exploration this week and already I've colonized Venus and Mars!

    V:e:n:u:s:a:n:d:M:a:r:s
    "We only become what we are by the radical and deep-seated refusal of that which others have made us." -Jean-Paul Sartre

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  7. #139
    Senior Member Bwv 1080's Avatar
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    Due to time dilation, interstellar travel is feasible within human life times, sustaining 1g acceleration, a human could even make it to Andromeda within their lifetime. The issue, of course, is an energy source to sustain this acceleration.

  8. #140
    Senior Member Dim7's Avatar
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    Quote Originally Posted by Bwv 1080 View Post
    Due to time dilation, interstellar travel is feasible within human life times, sustaining 1g acceleration, a human could even make it to Andromeda within their lifetime. The issue, of course, is an energy source to sustain this acceleration.
    Which is why I think it's probably more feasible to extend human lifetime than to reach those speeds.
    ​​​​​​​​​​​​​​​

  9. #141
    Senior Member Luchesi's Avatar
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    deleted --- I don't think my post was correct so I don't want to mislead anyone.
    Last edited by Luchesi; Oct-16-2019 at 05:00.
    "We only become what we are by the radical and deep-seated refusal of that which others have made us." -Jean-Paul Sartre

  10. #142
    Senior Member KenOC's Avatar
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    A NASA scientist has created a new concept for an engine that he says can move "close to the speed of light" – all without any moving parts or need for fuel.

    "A new concept for in-space propulsion is proposed in which propellant is not ejected from the engine, but instead is captured to create a nearly infinite specific impulse," David Burns wrote in the paper's abstract. "The engine accelerates ions confined in a loop to moderate relativistic speeds, and then varies their velocity to make slight changes to their mass. The engine then moves ions back and forth along the direction of travel to produce thrust.”

    "It could also propel spacecraft across interstellar distances, reaching close to the speed of light. The engine has no moving parts other than ions traveling in a vacuum line, trapped inside electric and magnetic fields."

    Burns modestly notes that he’s not sure this will work…


  11. #143
    Senior Member Strange Magic's Avatar
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    Quote Originally Posted by KenOC View Post
    A NASA scientist has created a new concept for an engine that he says can move "close to the speed of light" – all without any moving parts or need for fuel.

    "A new concept for in-space propulsion is proposed in which propellant is not ejected from the engine, but instead is captured to create a nearly infinite specific impulse," David Burns wrote in the paper's abstract. "The engine accelerates ions confined in a loop to moderate relativistic speeds, and then varies their velocity to make slight changes to their mass. The engine then moves ions back and forth along the direction of travel to produce thrust.”

    "It could also propel spacecraft across interstellar distances, reaching close to the speed of light. The engine has no moving parts other than ions traveling in a vacuum line, trapped inside electric and magnetic fields."

    Burns modestly notes that he’s not sure this will work…
    I also invented something like that, and sold it to General Motors years ago. But the check bounced and they don't return my calls.

  12. #144
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    Quote Originally Posted by KenOC View Post
    A NASA scientist has created a new concept for an engine that he says can move "close to the speed of light" – all without any moving parts or need for fuel.

    "A new concept for in-space propulsion is proposed in which propellant is not ejected from the engine, but instead is captured to create a nearly infinite specific impulse," David Burns wrote in the paper's abstract. "The engine accelerates ions confined in a loop to moderate relativistic speeds, and then varies their velocity to make slight changes to their mass. The engine then moves ions back and forth along the direction of travel to produce thrust.”

    "It could also propel spacecraft across interstellar distances, reaching close to the speed of light. The engine has no moving parts other than ions traveling in a vacuum line, trapped inside electric and magnetic fields."

    Burns modestly notes that he’s not sure this will work…
    Sounds like perpetual motion to me.

  13. #145
    Senior Member Strange Magic's Avatar
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    Quote Originally Posted by MarkW View Post
    Sounds like perpetual motion to me.
    Or a variation of "Centromat Drive", an automobile propulsion system invented by Car & Driver Magazine decades ago when the first Mazda Wankel engine was introduced into the marketplace. Their tongue was firmly in their cheek.

  14. #146
    Senior Member Baron Scarpia's Avatar
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    Quote Originally Posted by KenOC View Post
    A NASA scientist has created a new concept for an engine that he says can move "close to the speed of light" – all without any moving parts or need for fuel.

    "A new concept for in-space propulsion is proposed in which propellant is not ejected from the engine, but instead is captured to create a nearly infinite specific impulse," David Burns wrote in the paper's abstract. "The engine accelerates ions confined in a loop to moderate relativistic speeds, and then varies their velocity to make slight changes to their mass. The engine then moves ions back and forth along the direction of travel to produce thrust.”

    "It could also propel spacecraft across interstellar distances, reaching close to the speed of light. The engine has no moving parts other than ions traveling in a vacuum line, trapped inside electric and magnetic fields."

    Burns modestly notes that he’s not sure this will work…
    I read something about this somewhere, something to the effect that the ions undergo faster helical motion when hitting one end of the containment field than the other, causing a net momentum impulse due to the difference in effective mass.

    The problem is not that it is a perpetual motion machine, but that it seems to violate momentum conservation, since the vessel achieves a net momentum and there is not canceling momentum. (A jet engine works because the engine moves one way while the exhaust goes the other way so the net momentum change is zero.)

    I'd bet any sum of money that the thing doesn't work. Perhaps they are calculating using special relativity when something resembling general relative is needed to get the right answer.

  15. #147
    Senior Member Flamme's Avatar
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    Probably a deceit...I want them 2 b real but its all just smoke and mirrors.
    'Listen, Mister god!
    Isn't it boring
    to dip your puffy eyes,
    every day, into a jelly of clouds?'

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