glacasa, 1 month ago

@poppastring
A light year is 9 461 billion km
A year is 31 557 600 s
(6x9461000000000)/(400x31557600)
-> Almost 4500 km/s

poppastring, 1 month ago

@glacasa I was a factor of 3 out for some reason :(

Thanks for the assist!

glacasa, 1 month ago

@poppastring
I thought of a simpler way to find the speed (and found the same result, which is a good thing)

The unit of the speed of light (c) is light-years per year
And because we know the distance in light-year and the duration in years, we know "their" speed is
6/400 c
= 0,015 c

According to wikipedia :
c = 299 792 458 m/s
0,015c = 4 496 887 m/s

still almost 4500 km/s

poppastring, 1 month ago

@glacasa 👍🏾