What is the Geocentric model?

What is the Heliocentric model?

Which model of the solar system was believed to be correct until the 1600s?

What invention caused new ideas about the solar system?

How are we able to study distant objects?

Who was the first to back up Copernicus' model after the invention of the telescope and why?

What happened to Galileo Galilei with his support of Copernicus' model?

How can photographs help observe the universe (compared with telescopes or naked eye)?

How did Galileo's observations of Jupiter (using the telescope) provide evidence for the heliocentric model of the Solar System?

Suggest one way in which our current model of the Solar System is different from Copernicus's

How does a refracting telescope work?

What is refraction and where does it happen?

What is the focal length of a lens?

What is a convex lens and how does it work?

When are waves reflected?