An generated by the combustion of an

An asteroid, therefore, by its fall into the sun developes sic from 4600 to 9200 times as much heat as would be generated by the combustion of an equal mass of coal. In 1613 Galileo “Letters on Sunspot” was published in Rome where he discovered sunspots which are dark area of irregular shape on the surface of the Sun, he prove Aristotle view on the sun was incorrect and it wasn’t a perfect sphere without imperfection.

He did this by visual proving it by using his telescope where he projecting the sun image through it onto a sheet of paper which had a circle drawn on it already and then lined this up to the imaged and then traced the spots directly on the paper(Winkler and Helden,1992)cite{Sunspots}. Figure 1 below show Galileo sunspots drawing.

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