What Are Comets?

How comets change as they journey around the Sun, what are they made of and where are they found?

Physics - Universe - Learning Points.

Comets formed from dust and ice particles when the Solar System was very young.
There are at least a hundred million comets orbiting our Sun.
The centre of a comet is called its nucleus.
The cloud surrounding a comet's nucleus is called the coma.

A Twig Context Film.
Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts in action in the real world.