Lecture08 - CelestialPole(inBerkeleyNorthCP)thepointonthe (...

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Sky based coordinates- same for every observer Celestial Pole  (in Berkeley - North CP) - the point on the  sky around which all stars turn  (Does Earth rotate or does  the sky? - How do you know?) Celestial Equator  - the great circle that is 90 from the  celestial poles Right Ascension (RA)  - great circles through the north  and south celestial poles (like longitude on the Earth) Declination (Dec)  - lines (but not straight ones) at regular  intervals perpendicular to lines of RA (like latitude on the  Earth) Ecliptic  - path of the sun on the celestial sphere Vernal and Autumnal Equinox   - location where the Sun  crosses the celestial equator.  Vernal: when the Sun goes  from below to above the ecliptic.  Autumnal: from above  to below. (places on the sky and times of the year)  Solstices  - Summer: location where Sun is farthest above  the celestial equator. Winter: farthest below.  (places and 
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Lecture08 - CelestialPole(inBerkeleyNorthCP)thepointonthe (...

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