Monday, February 13, 2012

Approximately how far in parsecs does a star moving at 1 km/sec travel in a million years?

I thought I was supposed to use the equation of parallax angle where

distance to star(parsecs)= 1/ parallex angle in arcseconds. But I'm at a total loss.Approximately how far in parsecs does a star moving at 1 km/sec travel in a million years?The angle formula doesn't come into this problem. A parsec is a distance, 30.86 脳 10^12 kilometers.



One million years is 10^6 x 365.25 x 24 x 60 x 60 seconds = 31.56 x 10^12 seconds.

So the star moves 31.56 / 30.86 = 1.023 parsecs.

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