Gravity is a physical force that exists between any two objects in the universe. It is the force that keeps us all firmly rooted to the ground and is responsible for the motion of celestial bodies in the night sky. It is also the force that keeps the planets and stars in their orbits.
Gravity is one of the four fundamental forces of nature, along with the strong and weak nuclear forces and electromagnetism. It is the weakest of the four forces, but it is also the most pervasive, affecting every object in the universe.
The force of gravity is determined by the mass of the two objects. The greater the mass of the two objects, the greater the force of gravity between them. It is also inversely proportional to the square of the distance between the two objects. This means that the force of gravity decreases as the distance between the two objects increases.
The most familiar manifestation of gravity is its effect on the motion of objects on or near the Earth’s surface. It is the force that causes objects to fall to the ground when they are dropped. It is also the force that causes objects to be attracted to the Earth’s surface, such as the Moon, which orbits the Earth.
Gravity is also responsible for the tides. The gravitational pull of the Moon and the Sun cause the oceans to rise and fall twice a day. Without gravity, the world would be a very different place.