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
The observatory is best noted for its research on the central region of the Milky Way Galaxy, the Magellanic Clouds, and high-energy cosmic radio and X-ray sources. In 1530 he finished his great book, 'Concerning the Revolutions of the Celestial Spheres'. Part FourThree Great Scientists Of The Past (In My Opinion) Based on my readings I believe that the following scientist have all made valuable contributions to astronomy :CopernicusGalileoKepler Here are some brief descriptions of their contributon to the understanding of astronomy:Copernicus (1473-1543) : Nicolas Copernicus is often considered the founder of modern astronomy. Copernicus apparently received the first copy as he was dying, on May 24, 1543. This is called the Cerro Tololo Interamerican Observatory or CTIO. Utilizing the newly developed concept that variable stars accurately reveal their distance by their period of variation and apparent brightness, he found that the clusters were distributed roughly in a sphere whose centre lay in Sagittarius. (3) The squares of the planets' periods of revolution are proportional to the cubes of the planets' mean distances from the sun. Curtis/Schmidt Telescope (0. The book opened the way to a truly scientific approach to astronomy.
Common topics in this essay:
Galaxies Evolve,
Hans Lippershey's,
Palomar Mtn,
Galileo Kepler,
Harold Johnson,
Sagittarius Utilizing,
German-born American,
Nicolas Copernicus,
Institution Washington,
Pasadena Calif,
centre galaxy,
earth planets,
radio sources,
angular momentum,
peak national observatory,
mount wilson,
sun lies,
deduced sun,
astronomical observatories,
light-years centre,
30000 light-years,
kitt peak national,
meter ritchey-chretien telescope,
shapley deduced sun,
tololo interamerican observatory,
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