Arsh Parekh-Virtual Lab 2
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School
Queens University *
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Course
101
Subject
Astronomy
Date
Apr 3, 2024
Type
Pages
6
Uploaded by LieutenantBoarPerson998
Your Submission Please provide the information requested on the following pages, and then submit, in electronic form, only the material from this point onward. (Do not submit a complete copy of the lab instructions.)
The submission should be done through the course website, following the
instructions there. PART I: Astronomy with the Human Eye (The Need for Telescopes) •
Attach a digital photograph of the page you have used for the resolution experiment (see page 6), and a second image showing the arrangement you adopted for its use
•
Fill in the following table of measurements as described on pages 7-8, expressing all units in centimeters (cm); and then, in the final column, calculate and enter the values of
‘Ratio’ requested
Text to be read Distance Size of print Ratio (R) Join the journal for open ed board 433.5
cm 2cm 217 BizSciTech 299.5 cm 0.7cm 328 Queens is 1/7 Partner Universities 127.5
cm 0.3cm 423 •
Enter here your adopted ‘representative’ value of R:
323 (see page 10) •
Question 1
from page 12: What size of feature would the astronauts be able to see?
(Show how you got that number) . Given that, would they be able to pick out Rogers Stadium, in Toronto? (Yes or no) The ISS orbits at about 400km above Earths sea level. Given the value of 323, they will be able to identify objects around 1238.39m in size (give or take). The stadium is 200m wide, they wont be able to identify it. ((400x1000))/323=1238.39m •
Question 2 from page 12: Do you think the Great Wall would be observable from the ISS? Justify your conclusion
, taking care to explain how the shape of the Wall may be important. Comment also on the question of the colour of the Wall.
The wall is 21,196.18km long and 7.8m high and the width is 4.5m, so it should be identifiable from space. The wall is not a consistent proper shape and its stretches across China, so because of its odd shape and long distance its not a complete flat plateau shape, making some parts harder to see or not visible at all. Since the wall is a dull toned colour and matches the colour and tone of its environment it may be missed or hard to single out from outer space. If it was a bright shining neon than it would be easy to locate.
https://www.thegaurdian.com/science/2003/oct/23/thisweekssciencequestions 27
•
Question 3 from page 12: How big would a feature on the Moon need to be if we are to discern it from the Earth with the unaided eye
?
((384x1000))/323=1188854.5m, that’s how big it would need to be.
•
Given that, would a patch the size of Lake Ontario be visible? (Briefly explain how you figured out the approximate size of Lake Ontario.) On the internet it shows that the lake is 311km long and 85km width, so it wouldn’t be visible. To be visible the feature on the moon would need to be 1,188,855m in length
•
Question 4 from page 13: if standing on the Moon, would you be able to pick out Lake
Ontario with the unaided eye? (No binoculars, no telescope…). Yes or no?
No because as previously mentioned any object must be 1,188,855m in length to be distinguished from the moon.
PART II: Kepler’s Laws in the Moons of Jupiter
Complete the entries
in the tables given here: Table 1 (from page 22) Moon Date and time of extreme Measured distance of moon from position the centre of Jupiter Io 01/24/24 (1:05:08PM) 1.5CM Europa 01/23/24 (10:05:08PM) 3.6CM Ganymede 01/23/24(12:05:08A
M) 5.8CM Callisto 01/24/24 (3:05:08PM) 7.71CM Table 2 (from page 22) Moon Date and time of Distance of moon from centre extreme position of Jupiter at that time, in I.U. Io 01/24/24 (1:05:08PM) 1.00 Europa 01/23/24 (10:05:08PM) 2.4 Ganymede 01/23/24(12:05:08
AM) 3.87
Callisto 01/24/24 (3:05:08PM) 5.14 Table 3 (from page 23) Moon Start time End time (1 full orbit later) Orbital Period in hours 01/24/24 (1:05:08PM) 01/26/24 (1:07:08)PM 36 Io 01/23/24 (10:05:08PM). 01/27/24 (11:05:08AM) 119 Europa 01/31/24 (06:05:08PM) 246 Ganymede 01/23/24(12:05:08AM)
01/24/24 (3:05:08PM). 02/09/24 (6:05:08AM) 375
Callisto 28
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Table 4 (from page 23) Moon Io Europa Ganymede Callisto Orbital period in I.M. 1.00 3.3 6.83 10.4 Table 5 (from page 24) Moon Distance from Jupiter, in I.U. Orbital period, in I.M. Io 1.00 1.00 Europa 2.4 3.3 Ganymede 3.87 6.83 Callisto 5.14 10.4 Table 6 (from page 24) Moon Distance from Orbital period in Distance cubed Period squared Jupiter in IU IM Io 1.00 1.00 1.00 1.00 Europa 2.4 3.3 13.8 10.89 Ganymede 3.87 6.83 58 46.65 Callisto 5.14 10.4 136 109
Final question/comment
: are you satisfied that the points plotted in your second simple plot indeed lie pretty much along a straight line? Do the moons of Jupiter seem to obey Kelper’s Third Law?
Yes because the graphs solidfy further that it’s a linear relationship and show that the moons of Jupiter obey the Third Law. 29
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