Science & Medicine, Natural Sciences, Society & Culture, Technology

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Whether the topic is popcorn or particle physics, you can count on BrainStuff to explore -- and explain -- the everyday science in the world around us.

What is a lightyear?

November 10th, 2008

Episode 117 of 1055 episodes

A lightyear is a way of measuring distance -- specifically, the distance light can travel in one year. Just how far is that? Check out this podcast from HowStuffWorks to learn more about astronomy.