SATELLITE :
2. Moon is a natural satellite, while INSAT-B is an artificial satellite of Earth.
3. The period of revolution of satellite revolving near the surface of earth is 1 hour 24 minutes (34 minutes).
4. Geo-stationary satellite revolves around the Earth at a height 36000 km (approx).
5.Time period of rotation of geo-stationary satellite is 24 h.
6. The Earth rotates on its axis from West to East. This rotation makes the Sun and the stars appear to be moving across the sky from East to West.
7. Geo-stationary satellite is used to telecast. TV programmes from one part of the world to another, in weather forecasting, in predictions of floods and droughts.
8. Polar Satellite Revolves around the earth in polar orbit at a height of 800km (app.) Time periods of these satellites is 84 min.
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