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Old June 22nd 20, 09:22 PM posted to alt.astronomy
Porcospino
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Posts: 7
Default Travel Among Stars Will Never Happen !

On 2020-06-22, Whisper wrote:
Interstellar, not intergalactic. The fact that you treat them as if they
were interchangeable says a lot.


Both impossible. Voyager would take 73,000 yrs to get to nearest star.
Jesus was alive only 2,000 yrs ago for some perspective. You'd need
1,000 generations to make 1 way trip if average life span is 73 yrs.
That's impossible.


Voyager is a terrible example because you're assuming that that peak of
possible propulsion technology was reached in the 1970s (which is a
ridiculous assumption). There have been papers detailing the engineering
requirements for decades-long trips to the nearest stars for a while
now, for example using laser-pushed light sails.

They are unfeasible from the point of view of present human society's
energy availability (but that should keep growing unless we go extinct
very soon or we abandon all our spacefaring ambitions) but there should
be no engineering showstopper, much less a physics breakthrough
required.

http://www.niac.usra.edu/files/studi...rt/4Landis.pdf

This study details a fly-by of Alpha Centauri lasting 44 years, but
there are plenty similar ones with shorter travel times depending on the
assumed sail diameter and energy output of the lasers.
And this is just one propulsion system among others that have been
studied.

Will this happen today or within this century, then? Should we try to
build this now? No, but only because a developed space presence is
required, and that will take decades or centuries to build up.

The main obstacle probably isn't even travel time itself.


I don't think the fact that we haven't gone beyond the Moon in fifty
years is significant, because technological development (and economic
growth) of this kind won't happen within decades.



It will never happen. 100% money back guarantee. Sorry to burst you
bubble but you need to grow up sometime.



"Never" is an awfully long time to bet something on.