How Do Satellites Use Magnets to Turn Without Fuel?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. How do satellites use magnets to turn without fuel?

The Big Idea

How do you turn a satellite in space, where there is nothing to push against? One answer is magnets! It sounds like a trick, but engineers really use it. Many small satellites carry special coils that push against Earth's own magnetic field.

Magnetorquers

Step one: magnetorquers. Many small satellites carry coils of wire called magnetorquers. When electricity flows through a coil, it becomes an electromagnet.

Pushing on Earth's Field

Step two: pushing on Earth's field. The coil pushes against Earth's magnetic field, like a compass needle trying to line up. The push gently turns the satellite, a little at a time, until it faces the right way.

No Fuel Needed

Step three: no fuel needed. The coil uses only electricity from solar panels. It needs no rocket fuel, so the satellite can last longer.

A Closer Look

Let's take a closer look! The coil gets electricity. It becomes a magnet. It pushes against Earth's field. The satellite slowly turns.

Quick Facts

Quick facts! Magnetorquers work well in low orbit, where Earth's field is strong enough. They need no rocket fuel. Solar panels provide the power. Satellites can last longer this way.

Think Like a Scientist

Now, think like a scientist! Sit on a swivel chair with a grown-up nearby. Swing your arms to turn yourself. Satellites also turn slowly with gentle pushes. Notice how little push it takes. Share your results with someone you love.

Outro

Small satellites turn by pushing electromagnets against Earth's field, without any rocket fuel. Science is amazing! Keep asking questions! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!