What is gravity

In this post i am gong to tell you about the gravity what is it where it comes from what is its work. First i want to explain that gravity is a natural thing which every planet every star have take the example that how it works it works like that if i jump from anywhere i will be fall down its is the work of gravity, but in the space there isn't any gravity so if i jump from any spaceship into space i wont be fall down but i will be be having no any mass in space because in space their isn't gravity gravity gives us power to go to run if there won't be any gravity on planets life cannot grow up and also gravity do another thing it keeps all planets in orbit around sun like earth do with moon.