Rocket propulsion what alternatives could there ever be?

Sbb1413

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my post was meant to clarify to soumya-8974, that it doesn't have to take a millenium to develop advanced propulsions.
I meant that it would take a millenium to fly from Earth to Proxima using your hypothetical anti-gravity machine, far slower than lightspeed drives.
 

NonHumanOnboard

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Not necessarily, Proxima is about 4.24 ly (268 AU) from the sun. New Horizons took 10 years to reach Pluto (39 AU), so it would take 70 years to reach Proxima given it's speed.
Now, let's say that we would use the sun for a good slingshot, it would take less then a year for that, but afterwards we would aquire enough speed (probably at least more then twice that of New Horizons).
To reach (almost) lightspeed, one would require a lot of fuel, and to slow down, the double. And ion-like engines have a too slow acceleration/deceleration, which too must burn constantly.
Anyway, to get into orbit alone, rockets would suffice, but to go out there, something else would be required. Otherwise we would have to send drones and probes to be our eyes.
As far as physics go, it is not possible to go beyond lightspeed using conventional acceleration, due to inter-atom bonds becoming weaker due to their relative speed and also the friction with radiation pressure outside of the solar system. I also suspect that the void isn't really a void but some kind of super liquid, which is influenced by gravity, just like a vortex in water. And if it's true, then this also would have to be taken into account.
 

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runaway star (stellar kinematics) form a shock wave in front of them this clearly shows that the vacuum is just a very rarefied gas this makes it impossible for a spacecraft to reach the speed of light
P.S. maybe this is the notorious dark matter
 

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Not necessarily, Proxima is about 4.24 ly (268 AU) from the sun. New Horizons took 10 years to reach Pluto (39 AU), so it would take 70 years to reach Proxima given it's speed.
Now, let's say that we would use the sun for a good slingshot, it would take less then a year for that, but afterwards we would aquire enough speed (probably at least more then twice that of New Horizons).
To reach (almost) lightspeed, one would require a lot of fuel, and to slow down, the double. And ion-like engines have a too slow acceleration/deceleration, which too must burn constantly.
Anyway, to get into orbit alone, rockets would suffice, but to go out there, something else would be required. Otherwise we would have to send drones and probes to be our eyes.
As far as physics go, it is not possible to go beyond lightspeed using conventional acceleration, due to inter-atom bonds becoming weaker due to their relative speed and also the friction with radiation pressure outside of the solar system. I also suspect that the void isn't really a void but some kind of super liquid, which is influenced by gravity, just like a vortex in water. And if it's true, then this also would have to be taken into account.
Not sure how that would work... ?
 

Sbb1413

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This is why I don't recommend interstellar travel. Our sphere should only be limited to the solar system until lightspeed drives are available, but the drives would be exclusively used for faster travel in the solar system similar to aeroplanes on Earth.
 

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They may never be available, you know...

Indeed.

It's interesting to consider UFOs here. Let's say they are real and technologically advanced.
If they came from other star systems we'd detect their FTL drives or wormholes. Our science is advanced enough.
UFOs seem limited to our atmosphere or LEO :)
So even considering unexplained pseudoscience, there no evidence for FTL travel.

If anything the UFOs come from parallel universes where the para-earths are on the same place as ours...
Let's say a para-earth that diverged from ours 2000 years ago. The landmasses would be the same, so no worry about crashing into a mountain when swapping universes.
But there's no distance involved (you simply swap universes) and most importantly FTL travel ;)

;)
 

Sbb1413

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Let's say a para-earth that diverged from ours 2000 years ago. The landmasses would be the same, so no worry about crashing into a mountain when swapping universes.
I believe that there are multiple Earths in multiple worlds, while our universe travels thru only one world. Worlds diverge at every Planck time*. There are infinite amounts of worlds and our universe choose the world with highest probability, altho exceptions are possible and hence the Holmesian Maxim†. I think there are other universes choosing different worlds.

* Planck time: 5.39 × 10-44 second
Holmesian Maxim: When you have eliminated the impossible, whatever remains, however improbable, must be the truth.
 
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