ASTR 1P01 Lecture Notes - Lecture 5: Egyptian Pyramids, March Equinox, March 20

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ASTR 1P01 Full Course Notes
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ASTR 1P01 Full Course Notes
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On a clear night one observes: stars (deneb, vega, altair , constellations: groups of stars, which lie in approximately the same direction (the only thing which they have in common!) Ursa major (its brightest stars form an asterism big dipper) Ursa minor (its brightest stars form little dipper) There are 88 constellations, 44 of which were known in the ancient times (we take their names from greek version translated into latin) What one observes in the night sky depends on the (geographical) latitude (st. catharines latitude is 43. 167 degrees north) Point directly over top of an observer is called the zenith (altitude= 90 degrees) Horizon (altitude = 0 degrees) meridian altitude = 60 degrees direction se. Altitude of an object (or point) in the sky is its angle above the horizon. To describe the daily (and annual) motions of stars we use the concept of celestial.

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