Question

why the space have zero gravity..?

Answer 1

Gravity from Earth keeps the Moon and human-made satellites in orbit. It is true thatgravity decreases with distance, so it is possible to be far away from a planet or star and feel less gravity. But that doesn't account for the weightless feeling that astronauts experience in space.

Answer 2

Gravity causes every object to pull every other object toward it. Some people think that there is no gravity in space. In fact, a small amount of gravity can be found everywhere in space. Gravity is what holds the moon in orbit around Earth.