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Lecture 9

Lecture 9 - September 28-astronomy notes.docx

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Department
Natural Science
Course Code
NATS 1745
Professor
Robin Metcalfe

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September 28, 2011 Planet Venus 1. Next to the Sun and Moon, Venus is the brightest object in the sky Venus appears as a special pin point of light for two reasons: -other than the Sun or Moon, Venus is the brightest object in the sky because other than the Sun and Moon, it’s the closest to us 2. In a given night, Venus moves with the stars due to earth’s spin. But from night to night, Venus changes its position relative to the stars, revealing itself as a planet (Greek for “wanderer”). -if stars appear to be moving at night (which is when you can observe this), it’s due to its own motion, not that of the Earth 3. Every 584 days, Venus traverses a half-loop around the rising Sun, then disappears. When it reappears, it makes a half-loop around the setting Sun, then disappears again (this is what Maya wanted to know, when Venus will appear, disappear) -takes about 90 days for Venus to be blocked by sun 4. The Mayan Venus records: -6 pages of the Dresden Codex contain illustrations of the Maya war hero Kukulcan, who was Deified and link
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