Discussions about why the sun appears to be so small compared with its actual size.
Can this theory be shown using classroom equipment?
Make models of the planets (to scale if possible) and compare the size of the sun and earth with other planets.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.