Name any two artificial satellites.

43 Classify the following into planets, satellites, stars and constellation. Moon, Alpha Centuri, Neptune, Orion, Mercury, Ursa Major, Sun, Phobos 44 Which of the following is not a star?(i) Alpha century (ii) Pole Star (iii) Shooting Star(iv) Sun 46 What is the difference between a natural and an artificial satellite? 47 Why is moon not suitable as a communication satellite?