Comets

What are comets made of? What is the structure of a comet (nucleus, coma, two tails)

Why do comets and their tails "shine"?

Their orbits are very "eccentric and retrograde". What does this mean?

What is the connection between comets and meteoroids?

Find the names of 3 comets and what their periods are.

Why do comet tails always point away from the Sun?

Create a table to summarise the differences between short and long period comets, including where they come from.

What was the mission of the spacecraft Giotto?

What and where is the Kuiper belt?   What evidence is there that Pluto originated as a Kuiper belt object?

What and where is the Oort cloud (possibly)?