# What is gravitational attraction

## Gravity

Gravity is the force with which an object is pulled to the ground. It is also called weight force or gravitation. Gravity is also the force with which an object or person presses on a scale. Gravity is therefore related to the term weight. Since we are on earth, gravity is also referred to here as gravity.

On earth, gravity causes all bodies to fall down. That is towards the center of the earth. In space, gravity determines the orbits of celestial bodies, i.e. planets, moons, satellites and comets and so on. These bodies attract each other and this is how their trajectories arise.

### Is an object equally heavy everywhere?

Gravity depends not only on the weight of an object, but also on the celestial body on which it is located. On earth, an astronaut presses a scales with a much greater force than on the moon. The gravity is much stronger than that of the moon.

That's because the earth is much heavier than the moon. The attraction of the earth is about six times greater than that of the moon. If an astronaut were to step on a normal scale on the moon, it would show a weight that is six times smaller than on earth. If the astronaut weighs 60 kilograms, the scales would only show 10 kilograms there. But that is only due to the scales, which were built for the much stronger gravity of the earth. The mass of the astronaut is the same, regardless of whether it is on earth or on the moon.

The further away a planet or other object is from another celestial body, the less the celestial body's gravity acts on it. If gravity can no longer be determined at all, one speaks of weightlessness.

• When rocks fall, gravity pulls the chunks down into the valley.

• You are weightless not only in space, but also when an airplane flies in a certain way, in parabolic flight.