Here's why:
* Inertia is a fundamental property of matter. It's the tendency of an object to resist changes in its motion.
* Mass is the measure of inertia.
* Your mass doesn't change just because you're in space.
What changes in space is the *force of gravity*. In outer space, you are much further away from large gravitational bodies (like Earth), so you experience less gravitational pull. This makes you feel weightless.
Here's the key difference:
* Weightlessness is a feeling of having no weight. It's caused by the lack of a normal force pushing you up, like the ground does on Earth.
* Inertia is a property of your body that remains constant, no matter where you are.
So, even though you might feel weightless in space, you still have the same inertia. This means you'll still resist changes in your motion - if you're moving, you'll keep moving at the same speed and direction unless a force acts on you.
