PHY121 Ch 2 Notes

PHY121 Ch 2 Notes - Astronomy Chapter 2: The Sky...

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Astronomy Chapter 2: The Sky Astronomers divide the sky into 88 constellations, a loose grouping of stars. Although the constellation originated in Greek and Middle Easter mythology, the names are Latin. Even the modern constellations, added to fill in the spaces between the ancient figures, have Latin names. Of the 88 constellations, 48 are still used today. Modern constellations are well-define regions of sky, irrespective of the presence or absence of bright stars. Named groups of stars that are not constellations are called asterisms , less formally defined star groupings that may overlap one or more constellations. The names of stars usually come from ancient Arabic, while the constellation name is Latin. Stars are also designated by a Greek letter (α, β, γ,) according to their relative brightness within a given constellation plus the possessive form of the name of the constellation Astronomers refer to the brightness of stars using the magnitude scale
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This note was uploaded on 12/11/2011 for the course PHY 121 taught by Professor Weinstein during the Fall '08 term at SUNY Buffalo.

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PHY121 Ch 2 Notes - Astronomy Chapter 2: The Sky...

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