For some massive stars, gravitational collapse doesn’t stop until the density of the star becomes so enormous that even light cannot escape. Such a star becomes a black hole.

The earth and the sun pull on each other with the same amount of gravitational force.

Ocean tides are caused by differences in the gravitational pulls by the moon on opposite sides of the earth.

The gravitational force of Earth on an object increases as the object moves farther from Earth.

If Earth were its present volume but with more mass, we would weigh more.

The gravitational force between two massive spheres

The gravitational field strength at the center of Earth is

If you were to weigh yourself in an elevator that is accelerating upward, compared to your ordinary weight you would weigh

By what factor would your weight be multiplied if Earth’s diameter shrank to half and Earth’s mass doubled?