1 AST114 Notes (Birth of Astronomy) - AST114 Notes Birth of Astronomy Picture of the day http\/antwrp.gsfc.nasa.gov\/apod\/astropix.html Celestial Sphere

1 AST114 Notes (Birth of Astronomy) - AST114 Notes Birth of...

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AST114 Notes Birth of Astronomy Picture of the day: Celestial Sphere: Imaginary sphere around the Earth on which objects in the sky reside. - Celestial Poles (Polaris) (when the north pole extends into the celestial sphere) - Celestial Equator Zenith: The point directly above your head. Horizon: Where the celestial sphere meets the ground. It goes 360 degrees around. ***The altitude of north pole will be equal to the altitude of the observer*** TERMS: Circumpolar zone: Area around the north/south celestial pole. Constellations: Star patterns – the sky is now broken into 88 sectors. Planets: Wanderers in the sky. Ecliptic: Apparent path of the sun through the stars. It is inclined at the 23 degrees due to the earth’s axis. Zodiac: 18 degree wide belt centered on the ecliptic. ***KNOW THE ZODIAC SIGNS: - Capricornus - Aquarius - Pises - Aries - Taurus - Gemini - Cancer - Leo - Virgo - Libra - Scorpius - Ophiuchus - Sagittarius ANCIENT ASTRONOMY

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