How Do Satellites Get & Stay in Orbit?

The video explains how artificial satellites are launched and maintained in orbit around Earth. It begins with a discussion of their functions and introduces Newton's cannonball thought experiment as a precursor to understanding satellite orbits. The video details the process of launching satellites using rockets and the importance of achieving the right orbital velocity to balance gravity and speed. It also covers the challenges of orbital decay due to atmospheric drag, particularly in low Earth orbit, and the methods used to counteract these effects. Finally, it discusses the end-of-life options for satellites, including de-orbiting and moving to disposal orbits.

What was the initial thought experiment by Isaac Newton that contributed to our understanding of satellite orbits?

• A balloon floating in the atmosphere

• A cannonball fired horizontally from a mountaintop

• A stone thrown into a pond

• A rocket launched vertically into space

What is the main challenge in keeping a satellite in orbit?

• Protecting against solar radiation

• Balancing gravity and velocity

• Avoiding collisions with other satellites

• Maintaining communication with Earth

Why do satellites in lower orbits need to travel faster?

• To reach higher altitudes

• To communicate with ground stations

• To maintain a stable orbit

• To avoid atmospheric drag

What causes orbital decay in satellites?

• Collisions with space debris

• Atmospheric drag

• Solar flares

• Gravitational pull from the Moon

What is a disposal orbit?

• An orbit where satellites are repaired

• An orbit where satellites are stored after decommissioning

• An orbit where satellites are launched

• An orbit where satellites are tested