use decimal time
100 seconds per minute		0.864 seconds
100 minutes per hour		1.44 minutes
10 hours per day		2.4 hours
10 days per week
10 weeks per month
10 months per year


C = 299 792 458 metres per second
one light year = 9 454 254 955 488 000
time dilatation = deltaT / (sqrt(1-(v**2/C**2)))
one metric year in one metric hour @ 0.99999999499987424 C


human live 25-35 metric year
our day is separated in 10 year, mean day/year time dilatation and matching our day to them
human will die in 2-3 days of our
 their light year take 25 902 068 371 200 000.0 meter
 their year/our year convertion = 2.73972/1
 alpha centaurie is 4.24 light year from sun (our)
 alpha centaurie is 1.5476 light year from sun (their)
 trip to alpha centaurie will only take 1.55 hour let say 4 hours to turn around both (their)
 human can biologicly reproduce @ 5 year (their)
 human become productive @ 7 year (their)
 @ 20 human can think of retirement (their)