Surface gravity

What is Surface Gravity?

Surface gravity tells us how strong the pull of gravity is on the surface of a planet, moon, or star. It is how fast things would fall if you dropped them. This pull depends on how big the object is and how fast it spins.

On Earth, things fall at about 9.8 meters every second squared. This is why things here fall the way they do. Scientists like to compare other objects to Earth by saying how many times stronger or weaker their gravity is.

Fun Facts About Gravity

Some objects in space have very strong gravity. For example, a white dwarf is a small, dense star left after a normal star burns out. It has a surface gravity much stronger than Earth’s. Neutron stars are even smaller and denser. Their surface gravity can be trillions of times stronger than Earth’s!

The pull of gravity on a planet or star depends on two things: its mass and its size. A bigger mass means stronger gravity. But if the object is also larger, the gravity might not feel as strong.

Gravity on Different Worlds

Here is a table showing how strong gravity is on different worlds in our Solar System:

Big planets made mostly of gas, like Jupiter, Saturn, Uranus, and Neptune, have surface gravity close to 1 g. This means it feels almost the same as standing on Earth!