Force of gravity is what keeps the planets form colliding.
As the planets orbit the sun, its gravity keeps them from colliding
As the planets orbit the sun, its gravity keeps them from colliding
The inertia of earth combines with gravity to keep it from colliding with the sun
The planet's gravity.
the suns gravity keeps the planets in orbit
Gravity and its velocity
gravity :)
the forse of gravity keeps it floating in space like the moon orbits our planet
gravity
Gravity
gravity
It keeps the ecosystem from flying off the face of the planet