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The Hindu Speaks On Scientific Facts - Volume II

Physical Sciences: Astronomy

With what material are Saturn's rings made up of? 115 Does solar eclipse occur during every new moon day? If so, can it be seen from some part of the earth? 116 How can scientists determine the temperature of planets or stars? 117 How can we measure the mass of a cometary nucleus? 118 Why are asteroids not sphere shaped? 118 What makes the earth rotate? 119 Why are all the planets in the universe spherical in shape? 119 Why does the colour of a star become red when it enters the red giant phase? Can we identify the stars which are going to end their life as supernova? 120 What is the difference between a shooting star and a comet? 121



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