Cooper_Christian AST Lab 7

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School

Lehigh Carbon Community College *

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Course

106

Subject

Astronomy

Date

Oct 30, 2023

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pdf

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2

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Results Sheet#7: Precession 7-1 RESULTS SHEET# 7: Precession NAME ___________________________________ DATE ________________SECTION ___________________ PART 1: CHANGING THE POLE STAR Use the arrow just to the left of the Time button to click time back to about 3000 B . C . In the table below, enter the name of the pole star at that time. Now use the arrow just to the right of the Time button to advance time to the other dates on the Table. Enter the name of the pole star at that time. Finally, state whether you think the star was or was not a good pole star. Base this on how close it came to the north celestial pole. Consider only the stars that are labeled . Year Pole Star A Good Pole Star? ( Yes/ No) 3000 B.C. 1 A.D. 2000 A.D 7800 A.D. 9600 A.D. 13200 A.D. Which star from the above table do you think is the best pole stars? ______________________ Which star from the above table do you think is the worst pole stars? _____________________
Results Sheet#7: Precession 7-2 PART 2: POINTER STARS Current pole star: ___________________ Current pointer stars: ___________________ and ___________________ Pole star in 3000 B . C .: ________________________ Pointer stars in 3000 B . C .: ___________________ and ___________________ PART 3: PRECESSION THROUGH THE AGES Record the current, most recent, and next age in the table below. Age Constellation Most recent age Current age Next age On your Sky Chart carefully count the number of constellations in the Zodiac. Number of Zodiacal constellations = _______. Since precession takes about 26,000 years, about how long is an average age (about how many years will the vernal equinox occur in each Zodiacal constellation)? Average number of years/ age = __________________________.
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