astronomy
AstronomersPart OneBrief Descriptions of the Following Astronomers:Walter Baade : Baade was a German-born American, whose work gave new estimates for the age and size of the universe. During the wartime, blackouts aided his observatons and allowed him to indentify and classify stars in a new and useful way, and led him to increase and improve Hubble's values for the size and age of the universe (to the great relief of geologists.) He also worked on supernovae and radiostars.Milton Humason : Humason was a colleague of Edwin Hubble's at Mt. Wilson and Palomar Mtn. who was instrumental in measuring faint galaxy spectra providing evidence for the expansion of the universe.Jan Oort : In 1927, this Dutch astronomer proved by observation (in the Leiden observatory) that our galaxy is rotating, and calculated the sirance of the sun from the centre of the galaxy and the period of its orbit. In 1950 he sugested the exsistence of a sphere of incipent cometary material surrounding the solar system, which is now called the 'Oort cloud.' He proposed that comets detached themsleves from this 'Oort-cloud' and went into orbit around the sun. From 1940 onwards he carried out notable work in radio astronomy.Harlow Shapley : Shapley deduced that th
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Some common words found in the essay are:
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Approximate Word count = 1877
Approximate Pages = 8 (250 words per page double spaced)
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