The Greenwich Guide to Day and NightExplains how the rotation of the Earth causes the cycle of day and night. |
Common terms and phrases
24 hours 400 times wider amount of daytime appear to move Berkeley Heights Big Dipper Cardiff circumpolar stars clear night clocks and watches clockwise direction constellation counterclockwise direction crossed the meridian daylight each day daylight saving December Earth spins equator facing the Sun full moon gnomon gravity half always points Hemisphere 9 highest point hours of daylight imaginary line light and energy lit face meteoroids midday Sun Moon looked Moon not visible Moon Phases night sky nighttime North Pole North Star Stars north-south direction Northern orbits Earth orbits the Sun Orion passes between Earth planets Proxima Centauri quarter one week reaches its highest Rio de Janeiro rises and sets Science Project Ideas seen set their clocks Shadow sticks side of Earth solar eclipse South Pole Southern Hemisphere Sun crosses Sun has crossed Sun The Sun Sun's path sundial in London sundial says 12:00 sunspots temperature total eclipse Tropics western half zones