Here's how it works:
* Orbital Motion: Satellites don't simply float in space. They are constantly falling towards the Earth due to gravity. However, their horizontal velocity is so great that they constantly "miss" the Earth as they fall. This creates a curved path around the Earth, which we call an orbit.
* Balance of Forces: The satellite's forward momentum (inertia) wants to keep it moving in a straight line, while gravity pulls it towards Earth. The perfect balance between these two forces is what keeps the satellite in orbit.
* Orbital Velocity: The speed a satellite needs to stay in orbit is called its orbital velocity. This velocity depends on the satellite's altitude above Earth. Higher orbits require slower speeds.
* Circular vs. Elliptical Orbits: While we often imagine orbits as perfect circles, most are slightly elliptical. This means the satellite's speed varies slightly as it moves closer to and farther from Earth.
So, while it might seem like a satellite is just "floating," it's actually constantly falling towards Earth, but its forward motion keeps it in a continuous orbit.
