EclipsesLab Worksheet
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School
Clemson University *
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Course
103
Subject
Astronomy
Date
Dec 6, 2023
Type
Pages
4
Uploaded by ballerina15
Eclipses
Worksheet
III.
Lunar Eclipse May 15/16 2022
Load in the Eclipses.skyset file to Starry Night.
1)
Time and date when leading edge of moon enters penumbra:
May 15, 2022, 9:34 PM
2)
What is the time and date when about half of the Moon is in penumbra:
May 15, 2022, 10:03 PM
3)
What is the time and date when the trailing edge of the Moon enters the penumbra:
May, 15, 2022, 10:31 PM
4)
What is the time and date when the leading edge of the moon enters the umbra
May 15: 2022, 10:29 PM
5)
What is the time and date when about half of the moon is in the umbra
May 15, 2022, 11:01 PM
6)
When the Moon has entered the umbra halfway, sketch the moon with a line between
the penumbra and the umbra. (take a picture of a paper sketch or use a paint program
and insert picture here.)
7)
What is the time and date when the trailing edge of the moon enters the umbra:
May 15, 2022, 11:30 PM
8)
What is the time and date when the leading edge of the moon leaves the umbra
May 16, 2022, 12:56 AM
9)
What is the time and date when the trailing edge of the moon leaves the umbra
May 16, 2022, 1:55 AM
10) What is the time and date when the leading edge of the moon leaves the penumbra
May 16, 2022, 1:55 AM
11) What is the time and date when the trailing edge of the moon leaves the penumbra
May 16, 2022, 2:52 AM
12) Based on the times you recorded previously, what is the length of the total umbral lunar
eclipse?
One hour, 26 minutes
13) Based on the times you recorded previously, what is the length of the total penumbral
lunar eclipse? Four hours, 25 minutes.
14) Based on the times you recorded above, for how long was the moon experiencing at
least a partial eclipse? 5 Hours, 22 minutes.
15) Based on your drawing from question 6 what can you say about the shape of the Earth?
Because of the curve on the line down the middle, The earth seems to be slightly more oval
shaped than the moon.
16) In your own words describe who could see this lunar eclipse and who could not
Those who could see the lunar eclipse on earth would be those on the side of the earth facing
the moon. Those who would not be able to see it are those that are experiencing daytime on the
opposite side of the earth.
Return to the instructions to set up the program to answer the next set of questions.
IV.
Total Solar Eclipse August 21st 2017 Clemson SC
17) When did the eclipse begin? (At least some piece of the sun covered by the moon)
1:09 PM
18) What is the minimum separation of Moon and Sun in degrees:minutes:seconds format,
during the eclipse? (see instructions on how best to measure this)
3.2 arc seconds
19) What was the time of maximum eclipse? (Date and time of day of minimum angular
separation)
August 21, 2017, 2:38 PM
20) How long was the sun completely covered by the moon? (Define what you consider to
be completely covered and estimate a time based on that definition)
Three minutes
21) When did the eclipse end? (No part of the sun covered by the moon)
4:03 PM
22) How long did the eclipse last? (at least part of the sun covered by the moon)
About three hours
23) Describe the view of the sun during the totality of the eclipse.
The sun was not visible at all, but the sky around the moon was bright.
Return to the instructions to set up the program to answer the next set of questions.
V.
Annular Solar Eclipse of October 14, 2023 San Antonio TX
24) Start time of Eclipse:
10:25 AM
25) Time of maximum Eclipse:
11:54 AM
26) End time of Eclipse:
1:33 PM
27) Total time of at least partial eclipse:
About 3 hours.
28) In your own words describe an annular eclipse.
In an annular eclipse, the moon is at its closest point to the sun, so rather than be completely
covered by the moon, we can see a ring of the edge of the sun around the moon.
Return to the instructions to set up the program to answer the next set of questions.
VI.
Eclipse From Space August 21st 2017 Total Solar Eclipse
Load in the Eclipsefromspace.skyset file to Starry Night
29) What is creating the shadow you see on the far left side of the Earth?
The moon
30) When does the penumbra of the shadow reach the west coast of the United States?
12:11 PM
31) When does the umbra of the shadow reach the west coast of the United States?(This is
the very small darker circle in the center of the larger circle)
1:17 PM
32) When does the umbra reach the ocean on the east coast of the United States?
2:51 PM
33) When does the penumbra no longer touch any part of the United States?
4:22 PM
34) Describe who could see a total solar eclipse and who could see a partial solar eclipse
during this eclipse event. Support your answer with what you see in Starry Night.
Those who would see a total eclipse are those who are in the path of the Umbra, which goes
directly through the center of the United States. Those who would see a partial eclipse are
everyone in North America.
VII.
Eclipse Comparison and Review
35) Describe the alignment of the Earth, Moon and Sun during a lunar eclipse.
During a lunar eclipse the earth is in between the sun and the moon.
36) Describe the alignment of the Earth, Moon and Sun during a solar eclipse.
During a solar eclipse, the moon is in between the earth and the sun.
Go to this time and date site and scroll down, https://www.timeanddate.com/eclipse/
list.html
37) What is the average number of Lunar eclipses per year?
There are about two per year.
38) What is the average number of solar eclipses per year?
There are about two per year.
39) Look at the dates for the eclipses in 2025. How long after each lunar eclipse does the
solar eclipse occur? Does this make sense with what you know about the motion of the
moon? A solar eclipse occurs about two weeks after a lunar eclipse. This is because the
Moon will have gone from Full to New within that two week period, and thus an eclipse
can occur.
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40) Based on all the data you collected are you more likely to see a total solar eclipse or a
total lunar eclipse? Explain in detail. (Consider how often eclipses occur, how long they
last, and who is able to view them when they occur)
You are more likely to see a total lunar eclipse. Total solar eclipses are rarer to appear in a
specific location and have shorter durations, total lunar eclipses have longer durations and are
visible from a wider range of locations on Earth. Therefore you are more likely to witness a total
lunar eclipse.