Re: search for second earth
Originally Posted by
gumbud
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love your positivity fender - the reports of 'seen spacecrafts' fits your ideas - people describe them as able to move very quickly in the sky - 'one minute they were hovering over here and the next had just moved almost invisibly over to there?"
Oh, I'm sure we'll find a way one day.
I studied astrophysics for a bit, but that was 25 years ago!
Some laws stand firm though - hence thinking outside the box.
For example, a craft will never match or exceed the speed of light. You could get close, but that's it.
Reason being.
A craft is mass, light is pure energy.
As you accelerate mass, it gains more effective mass. As the craft accelerates, it gets heavier requiring a more powerful engine to push it faster, as it gets faster, it gets heavier requiring a more powerful engine - ad infinitum! Therefore, you'd need an engine of infinite power, which to our current knowledge is not possible, although it has been theorized using an ion drive.
With the other methods you are kind of cheating. If you warp time and space around an object, it's no longer a mass moving through space. It's kinda like space (or energy) moving through space.
That along with bending the fabric of space, have been investigated many times and never been really discounted as being plausible.