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Astronomy vs. Astrology • Astronomy - ______________ The branch of ________________________ science dealing with the ________________________ objects and phenomena that ________________________ lie beyond the Earth’s ________________________ atmosphere. mythical belief • Astrology – ______________ that stars rule your life ________________________ Why is Astrology not a science? 1. The star patterns that from constellations have ______________________ different meaning in ______________________ different cultures. Asterism – a pattern in • ___________ the sky made from a subset of stars within an official constellation or a pattern in the sky made from stars that are in different constellations. Constellation Ursa Major Asterism Big Dipper Winter Triangle 2. Over 100,000 years the placement of stars change Precession – slow conical – ___________ – motion of the Earth on its axis cause by the gravity of the Sun and Moon on the Earth “Signs” off by 1 month 12 zodiac 3. Astrology uses ___ constellations, when there 13 are actually ____. Ophiuchus “The Serpent Holder” Dec 1st – Dec 19th Not included Ophiuchus 12 Zodiac Signs in Horoscopes 13 Zodiac Signs 4. Constellation vary in _____. size - The Sun spends different amounts of time in each constellation. 45 days 7 to ____ - From ___ Constellation Dates • • • • • • • • • • • • • Sagittarius Dec 18 - Jan 18 Capricorn Jan 19 - Feb 15 Aquarius Feb 16 - Mar 11 Pisces Mar 12 - Apr 18 Aries Apr 19 - May 13 Taurus May 14 - Jun 19 Gemini Jun 20 - Jul 20 Cancer Jul 21 - Aug 9 Leo Aug 10 - Sep 15 Virgo Sep 16 - Oct 30 Libra Oct 31 - Nov 22 Scorpius Nov 23 - Nov 29 Ophiuchus Nov 30 - Dec 17 Number of Days 32 28 24 38 25 37 31 20 37 45 23 7 18 weak at great 5. Gravity is _________ distances.