Question 1

A(n) _______________ occurs when the Moon moves between Earth and the Sun.

Accepted Answer

The answer of A(n) _______________ occurs when the Moon moves...

Question 2

Total lunar eclipses tend to be darkest when the Moon's orbit carries it through the center of the _______________.

Accepted Answer

The answer of Total lunar eclipses tend to be darkest...

Question 3

A(n) _______________ can occur only at a full Moon if the Moon's path carries it through the shadow of Earth.

Accepted Answer

The answer of A(n) _______________ can occur only at a...

Question 4

What does a waning crescent moon mean?

Accepted Answer

A)  The changing Moon between full moon and third quarter 
B)  The changing Moon between third quarter and new moon 
C)  The changing Moon between first quarter and full moon 
D)  The changing Moon between new moon and first quarter 
E)  The changing Moon between first and third quarters 
A)  The changing Moon between full moon and third quarter 
B)  The changing Moon between third quarter and new moon 
C)  The changing Moon between first quarter and full moon 
D)  The changing Moon between new moon and first quarter 
E)  The changing Moon between first and third quarters

Question 5

Calculate the angular diameter of the Moon with these known facts: Moon's linear diameter = 3480 km
Moon's average distance from Earth = 384,000 km
Number of arc seconds in 1 radian = 2.06 × 105

Accepted Answer

A)  31 arc seconds 
B)  187 arc seconds 
C)  1750 arc seconds 
D)  1870 arc seconds 
E)  1910 arc seconds 
A)  31 arc seconds 
B)  187 arc seconds 
C)  1750 arc seconds 
D)  1870 arc seconds 
E)  1910 arc seconds

Question 6

What is an eclipse season?

Accepted Answer

An eclipse can occur only in a period ca

Question 7

At what point is the Moon closest to Earth?

Accepted Answer

A)  apogee 
B)  perigee 
C)  umbra 
D)  penumbra 
E)  prominence 
A)  apogee 
B)  perigee 
C)  umbra 
D)  penumbra 
E)  prominence

Question 8

To see a solar eclipse, you have to be in Earth's shadow.

Accepted Answer

A) True 
 B)False

Question 9

The Moon moves slowly against the background of the constellations.

Accepted Answer

A) True 
 B)False

Question 10

What is a new moon?

Accepted Answer

A)  The lunar phase in which the first-quarter moon approaches full moon 
B)  The lunar phase in which Earth's shadow is cast on the Moon 
C)  The lunar phase in which the Moon's shadow is cast on Earth 
D)  The lunar phase in which sunlight illuminates only the far side of the Moon 
E)  The lunar phase in which sunlight illuminates the Earth facing side of the Moon 
A)  The lunar phase in which the first-quarter moon approaches full moon 
B)  The lunar phase in which Earth's shadow is cast on the Moon 
C)  The lunar phase in which the Moon's shadow is cast on Earth 
D)  The lunar phase in which sunlight illuminates only the far side of the Moon 
E)  The lunar phase in which sunlight illuminates the Earth facing side of the Moon

Question 11

Match between columns
                        Premises: The region of total shadow
A completely eclipsed Moon
The farthest point in the Moon's orbit
The orbital period with respect to the stars of about 27 days
The closest point in the Moon's orbit
A complete cycle of lunar phases of 29.53 days
The two points at which the Moon's orbit crosses the ecliptic
The illuminated portion of the Moon decreases
The region of partial shadow where sunlight is dimmed
The illuminated portion of the Moon increases

Accepted Answer

The Answer of sidereal period and umbra and synodic period is...

Question 12

What happens during a penumbral lunar eclipse?

Accepted Answer

A)  Earth only partially enters the penumbra. 
B)  Earth enters the entire penumbra. 
C)  The Moon partially enters the penumbra. 
D)  The Moon only partially enters the umbra. 
E)  Earth only partially enters the penumbra 
A)  Earth only partially enters the penumbra. 
B)  Earth enters the entire penumbra. 
C)  The Moon partially enters the penumbra. 
D)  The Moon only partially enters the umbra. 
E)  Earth only partially enters the penumbra

Question 13

Why can't a lunar eclipse happen at every full moon?

Accepted Answer

Most full moons pass too far n

Question 14

There is one side of the Moon that can never be seen directly by observers on Earth.

Accepted Answer

A) True 
 B)False

Question 15

How many times does the Moon cross the ecliptic each month?

Accepted Answer

A)  none 
B)  once 
C)  twice 
D)  three times 
E)  four times 
A)  none 
B)  once 
C)  twice 
D)  three times 
E)  four times

Question 16

If the Moon crosses Earth's shadow at the center of the umbra, how long will the entire eclipse last from start to finish?

Accepted Answer

A)  2 to 3 minutes 
B)  7 minutes 
C)  1 hour 45 minutes 
D)  2 hours 
E)  6 hours 
A)  2 to 3 minutes 
B)  7 minutes 
C)  1 hour 45 minutes 
D)  2 hours 
E)  6 hours

Question 17

What happens every 29.5 days?

Accepted Answer

A)  The Moon's Saros cycle 
B)  The Moon's synodic cycle 
C)  The Moon's sidereal cycle 
D)  The Moon's ecliptic season 
E)  The Moon's chance for a partial eclipse 
A)  The Moon's Saros cycle 
B)  The Moon's synodic cycle 
C)  The Moon's sidereal cycle 
D)  The Moon's ecliptic season 
E)  The Moon's chance for a partial eclipse

Question 18

As the illuminated part of the Moon grows larger from new to full, it is said to "wane".

Accepted Answer

A) True 
 B)False

Question 19

Since the Moon is about 0.5 degrees in angular diameter, about how far does it move in 24 hours across the background of the constellations?

Accepted Answer

A)  0.5 degrees 
B)  1.0 degree 
C)  2 degrees 
D)  9 degrees 
E)  13 degrees 
A)  0.5 degrees 
B)  1.0 degree 
C)  2 degrees 
D)  9 degrees 
E)  13 degrees

Question 20

Predicting an eclipse is easy because all you have to do is keep track of where the Moon crosses the ecliptic.

Accepted Answer

A) True 
 B)False

A(n) _______________ occurs when the Moon moves between Earth and the Sun.

Total lunar eclipses tend to be darkest when the Moon's orbit carries it through the center of the _______________.

A(n) _______________ can occur only at a full Moon if the Moon's path carries it through the shadow of Earth.

What does a waning crescent moon mean?

Calculate the angular diameter of the Moon with these known facts: Moon's linear diameter = 3480 km Moon's average distance from Earth = 384,000 km Number of arc seconds in 1 radian = 2.06 × 10⁵

What is an eclipse season?

At what point is the Moon closest to Earth?

To see a solar eclipse, you have to be in Earth's shadow.

The Moon moves slowly against the background of the constellations.

What is a new moon?

What happens during a penumbral lunar eclipse?

Why can't a lunar eclipse happen at every full moon?

There is one side of the Moon that can never be seen directly by observers on Earth.

How many times does the Moon cross the ecliptic each month?

If the Moon crosses Earth's shadow at the center of the umbra, how long will the entire eclipse last from start to finish?

What happens every 29.5 days?

As the illuminated part of the Moon grows larger from new to full, it is said to "wane".

Since the Moon is about 0.5 degrees in angular diameter, about how far does it move in 24 hours across the background of the constellations?

Predicting an eclipse is easy because all you have to do is keep track of where the Moon crosses the ecliptic.

Here and Now

A Users Guide to the Sky

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Interstellar Medium

Formation and Structure of Stars

Stellar Evolution

Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Astrobiology

Filters

Exam 3: Moon Phases and Eclipses

A(n) _______________ occurs when the Moon moves between Earth and the Sun.

Total lunar eclipses tend to be darkest when the Moon's orbit carries it through the center of the _______________.

A(n) _______________ can occur only at a full Moon if the Moon's path carries it through the shadow of Earth.

What does a waning crescent moon mean?

Calculate the angular diameter of the Moon with these known facts: Moon's linear diameter = 3480 km Moon's average distance from Earth = 384,000 km Number of arc seconds in 1 radian = 2.06 × 105

What is an eclipse season?

At what point is the Moon closest to Earth?

To see a solar eclipse, you have to be in Earth's shadow.

The Moon moves slowly against the background of the constellations.

What is a new moon?

What happens during a penumbral lunar eclipse?

Why can't a lunar eclipse happen at every full moon?

There is one side of the Moon that can never be seen directly by observers on Earth.

How many times does the Moon cross the ecliptic each month?

If the Moon crosses Earth's shadow at the center of the umbra, how long will the entire eclipse last from start to finish?

What happens every 29.5 days?

As the illuminated part of the Moon grows larger from new to full, it is said to "wane".

Since the Moon is about 0.5 degrees in angular diameter, about how far does it move in 24 hours across the background of the constellations?

Predicting an eclipse is easy because all you have to do is keep track of where the Moon crosses the ecliptic.

Here and Now

A Users Guide to the Sky

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Interstellar Medium

Formation and Structure of Stars

Stellar Evolution

Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Astrobiology

Filters

Calculate the angular diameter of the Moon with these known facts: Moon's linear diameter = 3480 km Moon's average distance from Earth = 384,000 km Number of arc seconds in 1 radian = 2.06 × 10⁵