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. Whether the topic is popcorn or particle physics, you can count on the HowStuffWorks team to explore - and explain - the everyday science in the world around us on BrainStuff. Watch More BrainStuff on TestTube testtube.com/brainstuff Subscribe Now! www.youtube.com/subscription_center?add_user=brainstuffshow Watch More www.youtube.com/BrainStuffShow Twitter twitter.com/BrainStuffHSW Facebook facebook.com/BrainStuff Google+ gplus.to/BrainStuff

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