Why does Astronauts float like Super Man in the International Space Station ?

Even if the Microgravity present in the space, the question comes in Our Mind That why the Astronauts Float In The International Space Station like  Superman.
Lets Consider an example, when a person on the earth surface, throw a stone up in the sky with an angle the stone falls on the ground after sometime by following parabola path. Suppose you are falling with the stone. According to Gravitational Law  you and the stone will fall together irrespective of the mass. While you are falling, from your perspective you can see the stone is floating with you. It is similar to free fall. When a skydriver perform a free fall, he can able to do many stunt as he is like floating in the sky.
Similarly our space station are kept in such a position in the space that it want to fall but its  like its revolve around our earth. But in reality it is Actually in free fall position. So the Astronauts in the Space station are actually free fall around the earth. It doesn't fall vertically downward directly but it follows a parabola path which at such a height makes the space station to revolve around the Earth and the Astronauts to look like floating in the space.

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