Astro 127_Activity #4_Phases of the Moon
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University of Michigan *
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Course
127
Subject
Astronomy
Date
Dec 6, 2023
Type
Pages
7
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ACTIVITY#4—PHASES OF THE MOO
N
(EXERCISE
PORTIO
N
)
From the
NAAP Labs
list click on # 6
LU
N
AR PHASES
;
Then on the display that comes up, look under
Simulators
;
Find and click on the
Lunar Phase Simulator
to bring up the
Lunar Phase
Simulator
Applet
shown in
Fig. 1
Figure 1-Lunar Phase Simulator
As the Moon orbits Earth, the sides of both objects that are facing the Sun
will be illuminated; the sides that are opposite the Sun will be dark. How
much of the Moon’s illuminated side is facing toward Earth is what
determines the Lunar Phase that an observer on Earth will see.
Figure 2
-Postions 1-8 in the Moons orbit around Earth as viewed from
above the North Pole
.
PART 1-APPEARA
N
CE OF MOO
N
FROM EARTH
The large display window in the
Lunar Phase Simulator
in
Fig. 1
and
Fig. 2
are both views of
the Moon
’
s orbit around Earth from above Earth’s
North Pole. The
Moon Phase
display, the upper right display,
Moon Phase
shows you what an observer sees from Earth when they look at the Moon
and gives you the
name
of the
Moon Phase
.
Make sure that the position of the Moon in the
Lunar Phase Simulator
is
the same as in
position 1
in
Fig. 2.
In
Tab. 1
,
completely color in the image
of the Moon in the
Appearance
column in row 1 to indicate that the side of
the Moon facing you is all dark. Also record the
name
of phase of the Moon
from the
Moon Phase
display in
N
ame of Moon Phase
column in row 1 of
Tab. 1
.
Now click and drag the Moon in the large dispaly window of the
Lunar
Phase Simulator
to
position 2
in
Fig. 2
, you should see a little sliver of
light appear on the right side of the Moon in the
Moon Phase
display. Color
in the rest of the Moon,
the portion
that is in the dark in the image, of the
Moon in row 2 of
Tab. 1
. Also record the
name
of the phase of the Moon
from the
Moon Phase
display in
N
ame of Moon Phase
column in row 2 of
Tab. 1
.
Continue by successively moving the Moon in the large display window of
the
Lunar Phase Simulator
to each of the rest of the
positions
(
3-8
) in
Fig.
2
and in each numbered row of
Tab. 1
color in the portion of the image of
the Moon that is dark in the
Appearance
column and record the
name
of
the phase of the Moon from the
Moon Phase
display in the
N
ame of Moon
Phase
column.
PART 2 –RISE , TRA
N
SIT A
N
D SET TIMES
In this part you will use the
Lunar Phase Simulator
to determine the times
that the Moon will be visible to observers on Earth while in each of
its
different phases.
Again
make sure that the position of the Moon in the
Lunar Phase
Simulator
is the same as in
position 1
in
Fig. 2.
In
Tab. 1
,
use the
Animation and Time Controls
to advance time forward (the +
button) using the
increment animation:
hour
. As you advance
time, carefully watch the Moon in the
Horizon Diagram
(lower
right) display window of the
Lunar Phase Simulator
and use the
observer’s local time
to see what time the moon
rises (first appears from
below the Eastern Horizon) and
sets (first disappears below the Western
Horizon).
You can adjust your view of
the
Ho
rizon Diagram
display
by
clicking and dragging. Repeat the repeat the procedure described in the
above (previous) paragraph for
each of the rest of the
positions
(
2-8
) in
Fig.
2
.
and record
rise time
and
set time
of the Moon in their columns for each
Phase in in
Tab. 1
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The Moon’s
transit time
(the time it reaches its highest
altitude
for the day,
when it crosses the
meridian
and is above due south on the horizon) is the
time
halfway
between the moon’s rise and set times. Also record the
Moon’s transit time for each Moon Phase in the
transit time
column in
Tab. 1
.
Table 1
N
ame of
Moon Phase
(PART 1)
Appearance
(PART 1)
(color in the
part of the
Moon’s disk
that appears
dark to an
observer on
Earth)
Rise
Time
(PART 2)
Transit
Time
(PART 2)
Set
Time
(PART 2)
1
2
3
4
newmo
!
GAM
IPM
OPM
waxing
crescent
AM
4PM
9PM
First
avarter
IZOM
FOM
12AM
waxing
Gibbous
5
6
7
8
USE
TAB. 1
TO ANSWER THE FOLLOWING QUESTIONS
During which
phase
will you see the Moon first during the second half of
the night (that starts at midnight) and then for the first half of the day
(remember that the day is the time from sunrise to sunset and the night is
the time from sunset to sunrise)?
·
3PM
IOPM
3AM
Full
Moon
GPM
IAM
GAM
wantons
9PM
HAM
GAM
iniraavarter
IAM
AAM
ILPM
wargent
SAM
IOAM
SPM
Third
Quarter
During which
phase
will you see the Moon first for the second half of the
day then for the first half of the night?
During which
phase
will you not see the Moon at all? Explain your
reasoning.
During
which
phase
could a solar eclipse (the Moon blocking out the Sun as
seen from Earth) occur?
During which phase could a lunar eclipse (the Moon being covered by
Earth’s shadow as seen from Earth) occur?
NOW UPLOAD YOUR COMPLETED
EXERCISE
TO CANVAS
& MAKE SURE TO TAKE THE
ACTIVITY #
4 QUIZ
BY ITS DUE DATE/TIME
First
Quarter
During
the
new
Moon
.
During
this
phase
,
the
Moon
is
between
the
Sun
and
the
Earth
,
which
causes
the
unlit
side
of
the
Moon
to
face
Earth
.
New
Moon
Full
Moon
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