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s&s Chapter 5
The Cycle of the Year
| Question | Answer |
|---|---|
| Tropical year | Measured from time when Sun crosses celestial equator. Occurs around March 21st |
| Vernal equinox | A point of intersection on western half of celestial sphere between circles of ecliptic and celestial equator |
| Equinox | Comes from Latin word "aequus" which means equal and "nox" which means night |
| Summer solstice | When the Sun reaches the northern extreme of the ecliptic |
| Arctic Circle | A circle of continuous daylight around the North Pole |
| Tropic | From Greek word "tropos" which means turning |
| Insolation | From Latin word "insolatio", which means to expose to the Sun |
| Autumnal equinox | A point of intersection on eastern half of celestial sphere between circles of ecliptic and celestial equator |
| Armillary sundial | A circular sundial. Best sundial design. Imitates shape of firmament and best corresponds to Sun's path |
| Winter solstice | When the Sun reaches the southern extreme of the ecliptic |
| Constellations associated with months | Pisces (March), Aries (April), Taurus (May), Gemini (June), Cancer (July), Leo (August), Virgo (September), Libra (October), Scorpius (November), Sagittarius (December), Capricornus (January), Aquarius (February) |
| Time zones | Pacific, mountain, central, eastern |
| Tropic of Cancer | Defines northern extreme of tropics, zone of warm climate |
| Tropic of Capricorn | Other end of tropics from Tropic of Cancer |
Created by:
Jer Stephens
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