1.35 recall that the solar system is part of the Milky Way galaxy

What is a GALAXY?
Which galaxy are we in?
What type of galaxy are we in?
How many galaxies are there is the Universe?

1.34 Describe how the orbit of a comet differs from that of a planet

Three differences between planets and comets are:
Comets are usually made from _________
Comets have highly elliptical _______  compared to planets
Comets usually travel _________ than ________
Comets usually have long _______ , made when the heat from the Sun which vaporises the comet

 

1.33 Use the relationship between orbital speed, orbital radius and time period:

This is a graph showing the relationship between orbital speed and distance of planets from the sun.

1.32 Gravitational force

1.32- Explain that gravitational force:

• Causes the planets to orbit the sun
• Causes the moon and artificial satellites to orbit the Earth
• Causes comets to orbit the sun