I am the centre of the Solar System., Mars, Mercury, Sun, Which is the smallest planet?, Mercury, Venus, Pluto, I am the natural satellite of Earth., Pluto, Moon, Mars, How many types of satellites are there?, THREE, TWO , FOUR, __________ are self - luminous bodies, Satellites, Stars, Planet, How many planets are there in our solar system?, 7, 9, 8.

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