JSS1 Basic Science Lesson Note on Satellite

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TOPIC: FORCE

SUB-TOPIC: SATELLITE

MEANING OF SATELLITE

A satellite is a natural body that revolves round the earth or another planet. As we have learned earlier, the earth has one satellite which is the moon.       Scientist have launched artificial satellites (like space shuttle, rockets etc) into space to carry out experiments, collect information and learn more about other space.

Types of Satellite

1-Communications Satellite

Satellites floating in space have made communication over long distances easier and cheaper. A communications satellite receives a signal from Earth and then sends the information—a phone call, fax, or e-mail message—where it’s supposed to go.

GPS Network

The Global Positioning System (known as GPS) is a network of satellites that orbit Earth. A person with a GPS receiving device can determine his or her exact location anywhere on the planet!

Sputnik 1

The first artificial satellite was Sputnik 1, launched by the Soviet Union in 1957. It orbited Earth about once every 90 minutes for two months before it burned up in the atmosphere.

Nigeria launched its first satellite called NIGERCOMSAT1 on 27^th September 2003 and its communication satellite called SAT2 on 13^th May 2007

2-Weather Satellites

Some satellites are used to gather information about the weather. This satellite photo shows the swirling clouds of Hurricane Mitch, which hit Central America in 1998 and killed more than 11,000 people.

They help meteorologists to forecast weather.

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