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Artificial satellites are man-made satellites that revolve around the Earth and are different from the natural satellites. These man-made satellites are launched from the Earth and revolve around it in a much closer orbit than the moon.
Artificial satellite
Indian satellites:
India has launched many satellites and contributed to the development of various fields.
The first Indian satellite is Aryabhata, which was named after a famous ancient Indian Astronomer.
Aryabhata
Other Indian satellites:
- INSAT
- IRS
- Kalpana-1
- EDUSAT
Applications of satellites:
There are many practical applications of artificial satellites. Some of them are,
- Weather forecasting,
- Transmission of television and radio signals,
- Telecommunication, and
- Remote sensing.
Remote sensing:
The process of collecting information about an object without making any physical contact with the object is known as remote sensing.
Remote sensing satellite
Smallest satellite:
The world’s smallest satellite, Kalam Sat, was built by Rifath Sharook, a school student from Tamil Nadu. This 64\ -gram satellite was launched into space on June\ 22,\ 2017, by NASA.
Reference:
https://upload.wikimedia.org/wikipedia/commons/4/4c/Mec_aryabhatta.jpg
https://upload.wikimedia.org/wikipedia/commons/c/c8/RapidEye_Satellites_Artist_Impression.jpg
Kalamsat Image credit: 8th TN Science Textbook Page no 87
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