🚀 go-pugleaf

>>>Speed relative to Earth is 50 km/s
>>Lord Almighty! 1/6 the speed of light!!!!!! ???????
>
>In your dreams, the last I heard about the speed of light is roughly
>299,792 km/s. As somebody would say (?) what is a factor of 1000 
>between friends.

Arthur C. Clarke, I think... (I saw it in somebody's .sig on this
group.)

>One can extrapolate on this one since the shuttle is rougly doing 
>28,000 km/hr, is NASA taking into account the time distortion  between
>the crew and JSC?

Shuttle velocity = 28000 km/hr = 7.78e3 m/s
Lightspeed = 3.00e8 m/s

v/c = 2.60e-5

Time dilation formula:
T = T0 / sqrt(1 - (v/c)^2)

(v/c)^2 = 6.73e-10

(1 - x)^(1/2) = 1 - (1/2)x for x << 1

so dilation factor = 1 - 3.37e-10

Mission duration = 10 days = 8.64e5 sec

so Shuttle clocks will lag JSC clocks by 2.91e-4 sec at mission end.

A third of a millisecond? Significant? Some timing links might
conceivably get thrown off by a deviation of this magnitude. But
presumably they resync throughout the mission...


-- 
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  Bradford B. Behr
  bbbehr@sunspot.sunspot.noao.edu
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