### Theory:

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