The force that stops us from floating into space is gravity.

Here's why:

* Gravity is a force of attraction between any two objects with mass. The Earth has a lot of mass, so it exerts a strong gravitational pull on everything around it, including us.

* This pull keeps our feet firmly planted on the ground. Without gravity, we would simply float away into space.

* Gravity is also responsible for keeping the moon in orbit around the Earth, and the Earth in orbit around the sun.

So, gravity is the unsung hero that keeps us grounded and prevents us from becoming space travelers without a spacecraft!