HONORLOCK This is a CLOSED note exam. Using your e-book or textbook is NOT ALLOWED. You must remain in front of your computer for the duration of the exam. NO BATHROOM BREAKS. Cell phones, tablets, laptops, smart watches, and any other electronic devices are NOT PERMITTED – only the computer used for taking the exam is allowed. Failing to follow these instructions could result in a violation. This exam will be recorded and you will take it through HonorLock. EXAM FILE The exam file is located at https://bryantharden.com/wp-content/uploads/2025/05/ids-2431_final-exam_spring-2025-pdf.pdf.  If that link does not work, you can visit www.bryantharden.com > travel to the page titled “Other” > enter the password “Theory”.  The PDF will be linked on the page that you are then able to access. SUBMITTING YOUR ANSWERS You will type out your answers in this quiz.  There will be 6 places to write your answers: 5 spaces to write your short answer responses and 1 space to type out your multiple choice answers.

The Galilean moon with the shortest orbital period is

Use the space below to type out your answers to the 25 multiple choice questions. EXAMPLE: 1. A2. D3. C4. A5. B

Type your response to Short Answer #3.

Type your response to Short Answer #5.

Using the Method of Lab 6, we will measure the mass of Saturn in Solar Masses. We will use only 2 of Saturn’s Moons in this problem due to shortage of time. Make sure that your observations are from the North Pole, and use the angular diameter of Saturn as 0.00522o The steps are identical to Jupiter’s Moons but I have completed the data and the basic calulations for the Rhea. Note that the orbital radius is in Saturn diameters, DS.  I measured the maximum angular distance of Rhea from Saturn as 0.0228o which gives an orbital radius, R = 0.0228o0.00522o= 4.368 DS. Note that 1 Astronomical Unit (AU) = 1285 DS. Thus the orbital radius of Rhea in AU is R = 4.368/1285  = 0.003399 AU. You need to do the same series of measurements for the largest moon of saturn, Titan and then use the data of both moons to calculate the mass of Saturn in Solar Masses. Make sure to answer the questions below. Moon Start Date and Time End Date and Time Period T (days) Period T (Earth years) Orbital Radius, R (DS) Orbital Radius, R (AU) Rhea 08/04/23, 03:00 08/08/23, 13:00 4.417 0.0121 4.368 0.003399 Titan             Using Mass of Saturn = R3T2  = 0.000268 Solar Masses using Rhea’s Data Fill out the responses to these questions in the answer space below. 1.a. What was the Start Date and Time of Titan’s orbit? b. What is the End Date and Time of Titan’s orbit?  c. What is the period T of Titan in Earth years? d. What is the maximum angular distance of Titan from Saturn? e. What is the Orbital Radius R of Titan in AU?  2.  What is the Mass of Saturn as measured using the Data of Titan?

When an object is placed between the focal point and the coverging lens, which of the following is not a property of the created image? 

Decreasing the size of the objective lens in a refractor telescope does what to the image formed by the telescope?

A star has an apparent magnitude of 2.5 and an absolute magnitude of -4.0. What can be said about its distance from Earth?

All of the following are true about the Sun’s solar cycle except for?