Why is there no gravity?

Answer 1

Gravity is invisible. Imagine a table cloth held on by each corner above the

ground. This is the universe. Put an apple on it. This is a planet. The apple

makes a dent. This is gravity. Put grapes on the cloth. These are smaller

planets. They are drawn to the apple. Put a soccer ball on the cloth. This is a

very large planet. Everything moves towards it. Gravity.

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To answer the question:

There's no 'why', because there IS gravity, everywhere and at all times.

Answer 2

There is gravity present everywhere in the universe, including on Earth. Gravity is the force that attracts objects with mass towards one another. If it appears as though there is no gravity, it could be due to other forces counteracting its effects, such as the centrifugal force from the rotation of a planet.