Download PDF by Indumati Rao;C.N.R. Rao: Learning science Part 1 : Universe, solar system, earth

By Indumati Rao;C.N.R. Rao

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Extra info for Learning science Part 1 : Universe, solar system, earth

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Could Jupiter have become a star? The mass of the sun is 99% of the total mass of the solar system. The mass of Jupiter is 99% of the remaining 1%. This is the only reason why the sun became a star and Jupiter remained a planet. Astronomers believe that if the mass of Jupiter had been 100 times more than its actual mass, the temperature in its core would have been high enough to start nuclear fusion. 6 billion years ago, when the solar system began to form, Jupiter was a huge ball of cosmic cloud and dust.

They are: Rotation on its axis and Circular movement among its neighbouring stars and constellations. Its rotation period at its equator is 25 earth days and at its poles, it is 35 earth days. (1 earth day = 24 hours) The sun seems to be in a hurry to visit its friends, for, it travels at 250 km per sec. The sun does not move across the sky from sunrise to sunset. 41(water = 1) Waist (diameter at the equator) 1,400 million km. Average distance from earth ~150 million km. Surface temperature 60000C Core Temperature ~15 million 0C Rotation period at the equator 25 Earth days at the poles 35 Earth days Learning Science 31 Planets - chips of the old block Planets are made of the same elements as the sun.

Learning Science 57 Escape from earth’s gravity To escape the pull of the earth’s gravity, we must reach the limits of the atmosphere. Then, we have to enter into space. 2 km per second! This speed is called the escape velocity. The earth - our home planet We have explored space successfully. We have gathered evidence of what lies beneath the waves. It is strange but true that we know little about what lies beneath our feet. Getting to know our planet It is now known that the radius of the earth is ~6400 km.

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Learning science Part 1 : Universe, solar system, earth by Indumati Rao;C.N.R. Rao

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