Some of the apparently still unidentified footage looked rather suspiciously like a combination of parallax/perspective effects of an actually slow moving object combined with lens & camera artefacts, not entirely sure why they didn't figure that out.
reohn2 wrote: ↑15 Sep 2021, 6:28pm
From what I understand there's a LOT humanity don't know,take dimensions,the ordinary wo/man on the street are only aware of three or four,from what I've read,and I lay no claim to understanding the theory behind it,there are many more dimensions eleven at last count I believe .
String/m theory remains theory only of course. The additional dimensions posited in most branches of these theories are effectively 'compactified' so are perhaps not 'true' human scale additional spatial dimensions as featured in some sci-fi.
Mick F wrote: ↑15 Sep 2021, 2:28pm
Nearest star (other than our sun) is 4.3lightyears away ............... meaning the light from it takes over four years to get here at the speed of light. Alpha Centauri has no planets.
Nearest habitable planet is how far away?
Potentially there's a couple of habitable ones in the 4.2ly of proxima centuri. Though the star might be pelting them with a few too many solar flares! There are a fair few other candidates in the sub 20ly range, over the last decade or so we've confirmed very rapidly that planets are actually common as muck throughout the galaxy.
Also perspective matters. With our current understanding whilst the fastest travel time as seen here on earth might be 4.2 years, if the travellers are moving fast enough it could be an an awful lot faster for them, such is the nature of time dilation, even if that would take a large amount of energy. Whilst star trek style system hopping is definitely not an option with our present physics, something like generation ships are a feasible, albiet one way option.