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Districts of Tamilnadu at 1956 1.) Chennai 2.) Coimbatore 3.) Kanniyakumari 4.) Madurai 5.) Nilgiris 6.) Ramanathapuram 7.) Salem 8.) Thanjavur 9.) Tiruchirapalli 10.) Tirunelveli

Galaxy  System of billion stars, stellar remnants, interstellar gas,dust and dark matter. Milky way galaxy contains our solar system. Three major forms of Galaxy 1.Spiral 2.Elliptical 3.Irregular

There are 8 planets in our solar system.  All the planets are moving (revolution) around the Sun through its path( orbit).  First 4 planets are called "Inner planets".  Last 4 planets are called " outer planets". Except Uranus all planets are rotating from West to East. 1.) Mercury   Nearest to the Sun 2) Venus    Brightest and hottest    Seen from Earth    Called as "Earth twin","Morning Star","Evening Star" 3) Earth   Blue planet   Supports life  4) Mars     Red planet   Has polar ice caps  5) Jupiter    Largest planet    Has great red spot 6.) Saturn    Rings planet    2nd largest planet 7) Uranus   3rd Largest planet  Greenish in colour ( meethane gas)  Rotates East to West 8) Neptune   Extremely cold To remember these 8  planets I have created a mnemonic.  M y V ehicle E ngine M aintenance J umbs S lowly U p N owadays.  ...