1.33 explain that gravitational force:  causes moons to orbit planets  causes the planets to orbit the sun  causes artificial satellites to orbit the Earth  causes comets to orbit the sun

If an object is within the field of another objects gravitational force then it will travel around it in a path known as an orbit. In this way:

moons to orbit planets
the planets to orbit the sun
artificial satellites to orbit the Earth
comets to orbit the sun