The Moon's appearance changes in a regular way, moving through a sequence of phases in one lunar month.

Physics Narrative 11-14

This episode brings together ideas about movement with ideas about illumination–so drawing on the work on seeing things. The...

Physics Narrative 5-11

One place where it's hard to imagine movement is that our entire planet is moving. On the simplest description the Earth...

Physics Narrative 5-11

The cycle of day and night is caused by the rotation of the Earth as it spins on it axis once every 24 hours. Because of this...

Physics Narrative 5-11

The Moon is a sphere and it orbits the Earth. It is quite safe to look at the Moon, even through a telescope, because the...

Physics Narrative 5-11

Perhaps the first question to think about is how they get into orbit in the first place. Try a thought experiment that was...

Physics Narrative 5-11