Gravity is a fundamental force that exists throughout the universe. It is the force that attracts objects with mass towards each other. It is what keeps us grounded on Earth and is responsible for the motion of planets, stars, and galaxies.
No, gravity is not exclusive to Earth. Every object with mass, regardless of its size, has gravity. However, the strength of gravity depends on the mass of the object. So, larger objects like planets and stars have stronger gravitational pulls compared to smaller objects.
For example, the gravity on Earth is stronger compared to the gravity on the Moon because Earth is much more massive. The gravity on the Moon is about 1/6th of Earth's gravity, which is why astronauts can jump higher on the Moon.
Similarly, the gravity on other planets in our solar system varies due to differences in their mass. For instance, Jupiter, the largest planet, has a stronger gravitational pull compared to Mars, a smaller planet.
In summary, gravity is a force that exists everywhere in the universe, not just on Earth. The strength of gravity depends on the mass of the object, with larger objects having stronger gravitational pulls.