Unformatted text preview: constellations and hence twelve divisions called signs of the zodiac. Each division, however, because of the precession of the equinoxes, now contains the constellation west of the one from which it took its name. Meridian- the great circle of the celestial sphere that passes through its poles and the observer's zenith. Transit- the passage of a heavenly body across the meridian of a given location or through the field of a telescope. Midday- the middle of the day; noon or the time centering around noon. Local (Apparent) Solar Noon- number of hours before or past meridian (noon) Sidereal Time- meridian hours (when local time is noon) Zenith- The point on the celestial sphere that is directly above the observer (90 degrees above the celestial horizon ). (the disco ball point) North Celestial Pole- the celestial pole above the northern hemisphere; near Polaris Celestial Equator- the great circle of the celestial sphere, lying in the same plane as the earth's equator....
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- Fall '07
- Astronomy, Celestial equator, Celestial coordinate system, Polaris Celestial Equator