Satellite

satellites zoom around the earth high above us, held in orbit by gravity. Satellite Technology that’s OUT OF THIS WORLD !

Space tower

Russian scientist Konstantin Tsiolkovsky came up with the idea of building a tower into space, with a satellite at the top that could be used by spaceships on their way to oTher planeTs. He worked out the math to make it happen, but his ideas never got off the ground.

Sputni k 1 was t h e si ze of a b each ball .

Space Race

By the way... I was way ahead of my time: I developed an equation about rockets in 1903 that’s still used today!

The world’s first satellite, Sputnik 1, was rocketed into orbit by the Soviet Union in 1957. The country’s bitter rival, the United States, had been developing its own satellite and was furious to have lost the first episode of what became known as the Space Race. The first US satellite, ExplorEr 1, was launched just three months later. It couldn’t have happened without … Radio signals are used both to direct Alessandro Volta satellites and to invented the world’s receive information first batteRy, the voltaic from them. pile, in 1800.

Sputnik’s four antennae sent information on Earth’s atmosphere back to the surface.

The satellite contained a battery to power it and a radio transmitter. Solar panels power the majority of satellites.

Some satellites look like slowly moving stars. Did you know? Laika the dog became the first animal to orbit Earth when she zoomed into space on Sputnik 2, a month after Sputnik 1.

Modern satellites

There are now thousands of artificial satellites in orbit above our heads, transmitting signals or taking pictures for use in communication, navigation, research, and even spying. We have also sent space probes into orbit around other bodies in our Solar System: They are now satellites of the Moon, Mercury, Venus, Mars, Jupiter, Saturn, and the Sun.

HOW Satellites use radio waves to transmit information. IT WO R KS Communications satellites receive a radio signal beamed up to them from Earth and transmit it to another point on Earth’s surface. In this way, a signal—such as a television broadcast—can be sent over a very long distance almost instantaneously. The satellite picks up the signal, amplifies it, and sends it to Dish 2.

Dish 1 sends a signal to the satellite.

Dish 2 receives the signal many miles away from Dish 1. Satellites allow us to communicate instantly. They also warn us about wild weather, keep us from getting lost, and—experts believe—help keep the world at peace. How it changed

the world

The world’s first programmable computer was the Z3, invented in 1941. The V-2 rocket was developed by German Wernher von Braun in the 1940s.