---
title: Finding Earth’s Twin — HIGH T3CH
url: https://hight3ch.com/finding-earths-twin/
date: 2015-11-07
---

# Finding Earth’s Twin

Among the methods astronomers have used to discover extra solar planets, the most successful is a technique called transit photometry. It measures changes in a star’s brightness caused when a planet crosses in front of its star along our line of sight.