Precession Review

What is the period of precession?

• 26,000 years

• 12,000 years

• 30,000 years

• 40,000 years

What does the axis of Earth trace in the sky due to precession?

• A spiral

• A straight line

• A circle

• An ellipse

Which star is the current North Star due to precession?

• Betelgeuse

• Sirius

• Vega

• Polaris

What will be the North Star in the year 14,000 due to precession?

• Vega

• Polaris

• Sirius

• Betelgeuse

How does precession affect the seasons?

• It causes the seasons to disappear

• It changes the length of the seasons

• It has no effect on the seasons

• It causes the positions of the seasons to move slightly

What is the movement of Earth's axis due to precession similar to?

• The revolution of the planets

• The wobble of a spinning top

• The rotation of the Earth

• The orbit of the Moon

What will be the North Star in the year 28,000 due to precession?

• Betelgeuse

• Sirius

• Vega

• Polaris

How does the angle of tilt change due to precession?

• It becomes perpendicular to the orbit

• It changes only slightly

• It remains constant

• It changes drastically every year

What does the axis of Earth maintain despite precession?

• The same length

• The same direction

• The same angle of tilt

• The same speed of rotation