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lundi 7 octobre 2013

How Do Astronomers Measure Distance?





howstuffworks:

Since astronomers can’t actually travel to a star, they rely on two ingenious methods to measure a star’s distance from earth. Watch BrainStuff break down the science of space measurement in this episode.

(via osastar)

Oct 7, 2013 1:36 am by: kenobi-wan-obi

http://scinerds.tumblr.com/post/63352810750/howstuffworks-how-do-astronomers-measure

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