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Scientists Now Searching for "Alien Transit Systems"

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posted on Aug, 25 2015 @ 02:05 AM
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One cool idea to increase sail efficiency at low speed (start phase) is to let the beam bounce between sail and emitter. This would mean a (large) reflector at emitter site.

This might be something to look for, just in case the aliens had the same idea.




posted on Aug, 25 2015 @ 02:07 AM
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a reply to: MystikMushroom

Well, we are currently searching for gravitational waves, actually. The problem is that we think we can only 'maybe' detect waves from incredibly large events, such as two singularities merging, or something along those lines. That's the purpose of the LIGO detectors, and the planned gravitational wave detector to be set up in space.



posted on Aug, 25 2015 @ 02:07 AM
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a reply to: moebius
How would that work?
A light sail works by absorbing the energy of photons. Wouldn't reflecting from the sail be counterproductive?


edit on 8/25/2015 by Phage because: (no reason given)



posted on Aug, 25 2015 @ 02:09 AM
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a reply to: Phage

Things always get more logicy when you're around.



posted on Aug, 25 2015 @ 02:11 AM
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a reply to: Phage

Though, with our current level of tech, we are far from 100% efficiency. So that may be a useful idea for now.



posted on Aug, 25 2015 @ 02:12 AM
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a reply to: pfishy
It would have to be a pretty damned good reflector at the source, as well.



posted on Aug, 25 2015 @ 02:13 AM
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I wonder if we could detect artificial wormholes?

Would we even know what they look like, what energy they'd give off? If they even have a spectral signature?

That might be another way ET gets around.



posted on Aug, 25 2015 @ 02:15 AM
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a reply to: Phage

Well, a damned good sail to usefully reflect back enough of the unused energy in a coherent direction. But yes, at the source as well.
edit on 25-8-2015 by pfishy because: (no reason given)



posted on Aug, 25 2015 @ 02:16 AM
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a reply to: MystikMushroom

Seems like it would be a transient em signature accompanied by equally transient gravitational waves.



posted on Aug, 25 2015 @ 02:16 AM
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originally posted by: Phage
a reply to: moebius
How would that work?
A light sail works by absorbing the energy of photons. Wouldn't reflecting from the sail be counterproductive?


That would be a rather inefficient light sail. A perfect reflector gives you two times more thrust.

What would it do with the absorbed energy btw? Go up in flames?



posted on Aug, 25 2015 @ 02:16 AM
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originally posted by: MystikMushroom
Why not look for gravitational disturbances and/or warping of spacetime? (assuming we can even somehow watch for that). I would assume that "light sails" wouldn't be used by a truly interstellar alien civilization. We should be looking for the equivalent of a "warp signature" from Star Trek, no?



Humans barely cover the concept of gravity or warping spacetime. The current theories are thinly woven and controversial at best. If alien spacecraft generate their own artificial gravity bubble, as many ufologists imply, the whole point is a system like that is essentially immune and invisible to "gravatational" forces, hence little or no signature. Even if a signature was detectable, what do you think the shelf life is on such a disturbance of that magnitude imposed over the vast canvas of the cosmos?



posted on Aug, 25 2015 @ 02:20 AM
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a reply to: trifecta

Even a contained gravitational bubble should have an effect on the area around it. Theoretically similar to a wake, I would think. They may be able alter the physics immediate to their craft, but the energy differential would have to appear somewhere.



posted on Aug, 25 2015 @ 02:21 AM
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a reply to: trifecta

As far as it's scale, and our ability to detect it...
I got nothing.



posted on Aug, 25 2015 @ 02:23 AM
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a reply to: moebius



A perfect reflector gives you two times more thrust.

How so? Where does the thrust of a perfect reflector come from? There's no such thing as a free ride, right?



posted on Aug, 25 2015 @ 02:28 AM
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I think we should start with something simple and obvious like a big flashing sign out in space that says "Free Booze for all Space Travelers".

Just have that floating around in space for a while with an arrow pointing to earth and you'll get them to stop. That or there just isn't anyone else out there.



posted on Aug, 25 2015 @ 02:31 AM
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a reply to: mOjOm

You may have just either saved SETI a TON of money, or inadvertently started an interstellar war with a bunch of teetotaller prudes from Altair 6. Either way, ought to be an interesting show...



posted on Aug, 25 2015 @ 02:41 AM
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originally posted by: Phage
a reply to: moebius



A perfect reflector gives you two times more thrust.

How so? Where does the thrust of a perfect reflector come from? There's no such thing as a free ride, right?


Conservation of momentum.

Absorption: sail momentum new = sail momentum old + light momentum
Reflection: sail momentum new = sail momentum old + 2 * light momentum



posted on Aug, 25 2015 @ 02:43 AM
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a reply to: moebius

Provided the sail is reflecting 50% of the light back, and said light is being reflected with 100% efficiency.



posted on Aug, 25 2015 @ 02:49 AM
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a reply to: moebius

If there is no loss of light momentum when it encounters the sail, where does the thrust come from?

Every time the light is reflected from source to target, the effective distance doubles. Are you also assuming that a laser with no divergence is involved? A perfect laser along with a perfect reflector?


edit on 8/25/2015 by Phage because: (no reason given)



posted on Aug, 25 2015 @ 02:57 AM
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originally posted by: pfishy
a reply to: trifecta

Even a contained gravitational bubble should have an effect on the area around it. Theoretically similar to a wake, I would think. They may be able alter the physics immediate to their craft, but the energy differential would have to appear somewhere.


The "rubberband" theory or the "Star Trek wake", are a bit of a stretch (no pun intended), and not plausible in the material universe unless you somehow leash to a non-corporeal, parallel substrate with a whole new set of physics aND potential. Scientists are still debating whether gravity is even a legitimate force. But that's another thread.



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