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Chapt.3 - science

coordinate a set of 2 numbers that specifies the location of a point on graph on a graph
celestial equator the projection of the earth’s equator onto the celestial sphere
declination (DEC) celestial latitude; angular distance north or south of the celestial equator measure in degrees
right ascension (RA) celestial longitude; measured in hours, minutes, and seconds east of the prime hour circle
prime hour circle the reference line for celestial longitude, extending from the north to the south celestial poles through the point of the vernal equinox
magnitude the measure of the brightness of a star; a measure of the amount of energy released by an earthquake
red shift - the difference in the observed wavelengths of light from a celestial body compared to the wavelengths emitted at the source
proper motion - the portion of a star’s motion that is perpendicular to an observer’s line of sight - the portion of a star’s motion that is perpendicular to an observer’s line of sight
radial motion the portion of a star’s motion that is either directly toward or away from the observer
temperature a measure of the average energy of motion of the atoms or molecules of a substance, stated in degrees; the measure of the hotness or coldness of an object
supergiant classify the largest and most luminous stars
white dwarf a very dense, very bright star of about the same mass as the sun but only about a hundredth of its diameter
Created by: elle_cottrell