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Nicolaus Copernicus was a Renaissance mathematician and astronomer who formulated a heliocentric model of the universe which placed the Sun, rather than the Earth, at the center.
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first man in space and on the moon
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A comet is an icy small Solar System body that, when passing close to the Sun, heats
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.This group deciided that Pluto was not really a planet because of its size and location in space. .Pluto is no longer a planet, according to a new official definition. Instead the icy sphere will be considered one of more than 40 "dwarf planets.
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CSIRO stands for Commonwealth Scientific and Industrial Research Organisation.
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"NASA" stands for National Aeronautics and Space Administration. The term Aeronautics comes from the Greek words for "air" and "to sail