# Telescopes - Modern astronomy began in 1610 when Galileo created a telescope and pointed it at the sun and Jupiter - Telescopes vary alot - You can change the light collector area - Modern optical telescopes are measured in metres - 4m largest in Aus - 8m is hard - how to keep it steady? - [Segmented mirror telescopes](Segmented%20mirror%20telescopes.md) - [Space telescopes](Space%20telescopes.md) - # References 1. https://youtu.be/85ls-FPOVWM # Footnotes