People who use computers that linked to computers inside the rocket are called flight controllers.

They also have radio systems so they can talk to the astronauts inside the rocket even when it's in space.

Hello, astronauts.

This is the spaceport.

Can you hear me?

Hello?

Face board.

This is a rocket.

We can hear you loud and cliff the time before the rocket launches is called the countdown.

The countdown can last 4 to 5 days as the rocket gets ready to blast off into space.

But right at the very end, the spaceport counts down from 10 to 1.

Can you do the countdown with me?

Here goes time.

987 six.

Bye.

Cool.

Three to one way have lift off.