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Chapt.3 - science
| Term | Definition |
|---|---|
| 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
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