---
title: Light seconds, light years, light centuries: How to measure extreme distances — HIGH T3CH
url: https://hight3ch.com/light-seconds-light-years-light-centuries-how-to-measure-extreme-distances/
date: 2015-03-30
---

# 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? Yuan-Sen Ting shows us how trigonometric parallaxes, standard candles and more help us determine the distance of objects several billion light years away from Earth.

via TED Ed