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Unformatted text preview: Rises in evening; sets at dawn Phases of Moon and Time o Go over diagram in PowerPoint Lunar Eclipse (around Full Moon) o Umbra and Penumbra – total or partial obscuration o Umbra – dark part of the shadow o Penumbra – lighter part of the shadow o Earth’s maximum umbra at Moons’ distance is 9200 km; penumbra is 16000 km across Total Solar Eclipse: total obscuration of the Sun by the Moon, possible because the angular size of Moon equals Sun’s Solar eclipse (new moon): visible from a narrow ‘band’ across the Earth Annual solar eclipse: when the tip of moon’s umbra doesn’t quite reach the earth Eclipses occur on Line of Nodes: Earth-Moon-Sun must be in line Solar and Sidereal Day o How long is one day? 24 hours; 1 rotation of Earth on its axis o From noon (Sun directly overhead) to noon? o How long does it take for the Earth to complete one rotation on its axis?...
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