The precession of the equinoxes occurs in...

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Question 1 of 2066636ee928f7522a1c519e92

The precession of the equinoxes occurs in which direction?

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66636ee928f7522a1c519e92

The precession of the equinoxes occurs in which direction?

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🔍 Key Concepts

• Precession of the equinoxes is a slow, circular wobble of Earth’s axis over about 26,000 years • This wobble makes the equinox points move along the ecliptic relative to the fixed stars • Think about how Right Ascension (RA) of stars and the First Point of Aries change over long time periods

💭 Think About

• Picture Earth’s axis as a spinning top: in which direction does the tip of the axis slowly trace a circle on the celestial sphere? • Over centuries, does the First Point of Aries appear to drift toward increasing or decreasing Right Ascension? Relate that to east or west on the celestial sphere. • Historically, why does the ‘zodiac sign’ where the Sun is at the March equinox slowly shift relative to the background stars?

✅ Before You Answer

• Be clear on what east and west mean on the celestial sphere as seen from Earth, not on a map of Earth. • Recall whether the equinox point moves with Earth’s orbital motion around the Sun or against it along the ecliptic. • Verify which direction on a star chart corresponds to increasing Right Ascension versus decreasing Right Ascension before you choose between westerly or easterly.

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Question 1 of 2066636ee928f7522a1c519e92

The precession of the equinoxes occurs in which direction?

Back

Question 1 of 20

66636ee928f7522a1c519e92

The precession of the equinoxes occurs in which direction?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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