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1.7k shares, 326 points

Light seconds, light years, light centuries: How to measure extreme distances

When we look at the sky, we have a flat, two-dimensional view. So how do astronomers figure the distances of stars and galaxies from Earth? in this post we shows us how trigonometric parallaxes, standard candles and more help us determine the distance of objects several billion light years away from Earth.

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326
1.7k shares, 326 points

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