ASTRO120 Study Guide - Final Guide: Seafloor Spreading, Basalt, Escape Velocity
12 Jul 2013
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Document Summary
Ecliptic the path the sun follows as it appears to circle around the celestial sphere. Local sky the sky as seen from wherever you happen to be standing. North celestial pole the point directly over earth"s north pole. South celestial pole the point directly over earth"s south pole. Celestial equator projection of earth"s equator; complete circle around celestial sphere. Horizon boundary between the earth and the sky. Meridian imaginary half circle stretching from n to s through the zenith. Position of any object in the sky: direction (n, e, s, w, altitude (in degrees) Angular size of an object is the angle it appears to span in your field of view. Angular distance is the angle that appears to separate two items in the sky: 360 degrees in a full circle, 1 degree = 60 arcminutes, 1 arcminute = 60 arcseconds.
