Question 1

How does "gibbous" differ from "crescent"?

Accepted Answer

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Question 2

On which great celestial circle(s)on the celestial sphere would you find the position of the autumnal equinox?

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Question 3

Approximately how often do lunar eclipses occur?
A) twice every year
B) once per month
C) twice every 11 months
D) once every 11 years

Accepted Answer

Lunar eclipses occur approximately twice every 11 months.

Question 4

The figure below shows the different phases of the Moon.Label each phase of the Moon.What time would the full Moon be on your meridian? The new Moon?

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Question 5

The figure below shows four locations of the Sun on the ecliptic.Label each appropriately with the labels: autumnal equinox,vernal equinox,summer solstice,and winter solstice.

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Question 6

Earth experiences seasons because of the tilt of its axis.What are the two consequences of this tilt that contribute to the seasons?

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Question 7

Explain why we always see the same side of the Moon from Earth.

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Question 8

The center of the Milky Way lies approximately 30° south of the celestial equator.From what latitudes on Earth is it impossible to view the center of our galaxy?

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Question 9

What would be the effect on the seasons if the tilt of Earth's axis were 10° rather than 23.5°?

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Question 10

On what place(s)on Earth can you stand and have the great circle of the celestial equator be at the same height relative to your horizon for all 360° of its circumference?

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Question 11

For an observer in Seattle,Washington,which is located at latitude = +47°,what is the minimum height above the southern horizon that the Sun will have throughout the year,and approximately when will this occur?

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Question 12

What is the length of day during the equinoxes and solstices? Does it matter if you are in the Northern or Southern Hemisphere?

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Question 13

The figure below is a time exposure of the sky,showing the motion of the stars through the night.What is the name for the stars that never rise or set below the horizon?

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Question 14

Explain how you could use the stars to navigate a ship from northeast to southwest in the Northern Hemisphere.

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Question 15

How is the observed height of Polaris above the horizon related to an observer's latitude? (Hint: Consider three cases of observers located at the equator,the North Pole,and latitude = +45°.)

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Question 16

For the following figure,label the north and south celestial poles,the celestial equator,and the ecliptic.

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Question 17

The figure below shows the different phases of the Moon.Label each phase of the Moon.Approximately what time would the full Moon rise above your horizon? The third quarter Moon? The new Moon? The first quarter Moon?

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Question 18

The figure below shows the different phases of the Moon.Label each phase of the Moon shown.

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Question 19

Solar and lunar eclipses are rare because the Moon's orbital plane is tipped by:
A) 5.2° relative to the plane defined by Earth's equator.
B) 5.2° relative to Earth's orbital plane.
C) 23.5° relative to the plane defined by Earth's equator.
D) 23.5° relative to Earth's orbital plane.

Accepted Answer

The Moon's orbital plane is tipped about 5.2° relative to Earth's orbital plane around the Sun, not the plane defined by Earth's equator or any other angle. This inclination means that the Moon's shadow does not always fall on Earth during new moons (solar eclipses) nor does Earth's shadow always fall on the Moon during full moons (lunar eclipses), making such eclipses relatively rare events.

Question 20

Earth has an average radius of approximately 6.4 × 10³ km.What is the average speed of the ground due to the rotation of Earth at its equator in kilometers per second (km/s)if there are 8.64 × 10⁴ seconds per day?

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Quiz 2: Patterns in the Skymotions of Earth and the Moon

How does "gibbous" differ from "crescent"?

On which great celestial circle(s)on the celestial sphere would you find the position of the autumnal equinox?

Approximately how often do lunar eclipses occur?

The figure below shows the different phases of the Moon.Label each phase of the Moon.What time would the full Moon be on your meridian? The new Moon?

The figure below shows four locations of the Sun on the ecliptic.Label each appropriately with the labels: autumnal equinox,vernal equinox,summer solstice,and winter solstice.

Earth experiences seasons because of the tilt of its axis.What are the two consequences of this tilt that contribute to the seasons?

Explain why we always see the same side of the Moon from Earth.

The center of the Milky Way lies approximately 30° south of the celestial equator.From what latitudes on Earth is it impossible to view the center of our galaxy?

What would be the effect on the seasons if the tilt of Earth's axis were 10° rather than 23.5°?

On what place(s)on Earth can you stand and have the great circle of the celestial equator be at the same height relative to your horizon for all 360° of its circumference?

For an observer in Seattle,Washington,which is located at latitude = +47°,what is the minimum height above the southern horizon that the Sun will have throughout the year,and approximately when will this occur?

What is the length of day during the equinoxes and solstices? Does it matter if you are in the Northern or Southern Hemisphere?

The figure below is a time exposure of the sky,showing the motion of the stars through the night.What is the name for the stars that never rise or set below the horizon?

Explain how you could use the stars to navigate a ship from northeast to southwest in the Northern Hemisphere.

How is the observed height of Polaris above the horizon related to an observer's latitude? (Hint: Consider three cases of observers located at the equator,the North Pole,and latitude = +45°.)

For the following figure,label the north and south celestial poles,the celestial equator,and the ecliptic.

The figure below shows the different phases of the Moon.Label each phase of the Moon.Approximately what time would the full Moon rise above your horizon? The third quarter Moon? The new Moon? The first quarter Moon?

The figure below shows the different phases of the Moon.Label each phase of the Moon shown.

Solar and lunar eclipses are rare because the Moon's orbital plane is tipped by:

Earth has an average radius of approximately 6.4 × 10³ km.What is the average speed of the ground due to the rotation of Earth at its equator in kilometers per second (km/s)if there are 8.64 × 10⁴ seconds per day?