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| a number of heavenly bodies associated and acting together according to certain natural laws |
| the figure of the moon in its first or last quarter, resembling a segment of a ring tapering to points at the ends |
| absolute magnitude | |
| —n | |
| the apparent magnitude a given star would have if it were situated at a distance of 10 parsecs (32.6 light years) from the earth | |
| absolute magnitude
See under at magnitude. |