We live on a planet called the Earth that orbits the Sun once every 365 days. The Earth is one of nine known planets, while...

Physics Narrative 11-14

Much of the information about the planets in the solar system has been determined by observation. The planets Venus, Mars...

Physics Narrative 11-14

The history of how our view of the heavens changed is fascinating. This is a reconstruction, identifying some salient points...

Physics Narrative

Copernicus was born in 1473 and went to university at Cracow before becoming a canon in a cathedral in Germany. One of his...

Physics Narrative 11-14

Comets appear to be relics from the formation of the solar system. Unlike the planets, they are on highly elliptical orbits...

Physics Narrative 11-14

Beyond our solar system there are millions and millions of stars, but the nearest star to us is our own Sun.

Physics Narrative 11-14

Different kinds of objects in the solar system are known to exist. How we know that they exist is often due to a long chain of...

Physics Narrative 11-14

We live on a planet called the Earth that orbits the Sun once every 365 days. The Earth is one of eight known planets, while...

Physics Narrative 5-11