Term
3B-1
What two methods do astronomers have for describing where in the sky an object may be found? |
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Definition
1) by what constellation the star is on
2) by its coordinates |
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Term
3B-1
What do astronomers call a named area in the sky with imaginary boundaries running north, south, east, and west? |
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Definition
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Term
3B-1
Who introduced an orderly system for identifying particular stars within a constellation? |
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Definition
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Term
3B-1
How many modern constellations are there? |
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Definition
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Term
3B-1
How did Bayer generally designate the brightest or principal star in a constellation? |
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Definition
| by assigning Greek letters to the most prominent, alpha (a) is the brightest |
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Term
3B-1
What is the proper name for Delta Ursae Majoris? |
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Definition
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Term
3B-1
(True or False) The collection of ancient constellations completely covers the entire area of the sky. |
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Definition
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Term
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Definition
| distance in degrees north or south of the equator |
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Term
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Definition
| distance in degrees east or west of the prime meridian passing though Geenwich, England |
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Term
3B-1
What were constellations originally patterned after? |
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Definition
| they formed pictures that were similar to familiar objects, people or animals |
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Term
3B-2
Celestial latitude, or the angular distance between the celestial equator and a celestial object in degrees north or south, is called by what other name? |
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Definition
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Term
3B-2
What math symbol is used for celestial coordinates north of the celestial equator? south? |
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Definition
| + sign for north; - minus sign for south |
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Term
3B-2
What is the term that refers to celestial longitude? What units is it measured in? |
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Definition
| right ascension (RA); it is measured in hours |
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Term
3B-2
From what reference point is RA measured? Where is this point located in the sky? |
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Definition
| prime hour circle; vernal equinox |
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Term
3B-2
As the earth turns one hour, how many degrees does it turn? |
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Definition
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Term
3B-2
What is the approximate declination of Polaris, the North Star? |
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Definition
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Term
3B-2
(True or False) The earth's revolution around the sun changes both the right ascension and the declination of a star. |
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Definition
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