Q More Stellarium I have a word document version if you would like to download it. Third hour J exerciseDownload Third hour J exercise The video presentation is on the Helpful Videos for Third hour J page. Assignment: We will use the free planetarium software Stellarium again. We used Stellarium back in Third Hour D, so you should already have it on your computer. If you do not, go to that Third Hour assignment to find out how to install it, and watch the videos in that Third Hour for an introduction to the software. To complete this Third Hour activity, I recommend you follow these steps. 1. Watch the Video in this week's Module as a refresher; the video in Module D is more in-depth. 2. Read through the steps below. Hopefully these defaults are already set from the last time you used Stellarium. 3. Submit your work! Remember...to turn in your answers for grading, hit the "Submit Assignment" Button in the top right and then submit all the work as text or a file upload. Make sure to number each answer. Stellarium Review You should make sure that your options are set correctly--location to Sacramento, and all the appropriate tools are selected on the lower panel. Review Third Hour D if you need to. Options you should have "turned on" are in white (from left to right): Constellation Labels, Constellation Boundaries, Ground, Cardinal points, Atmosphere, Planet labels, Full screen mode, and Stop Time. If you want to exit Full Screen display, select the option called "Full screen mode” and the program goes in a "windowed" display. Before we set the time and date, stop the clock from advancing. Remember to "Find" something, one can use Ctrl-F (or Command-F on a Mac). Once the dialogue box comes up, type in the object you want and then hit Return. Important caution... Stellarium is a different tool than the Skygazer's Almanac and Planisphere and the results will vary. So, to get the correct answers... use the tools below as indicated. Do NOT use Stellarium to answer Planisphere questions, and vice versa! Stellarium Questions for this Module Start by setting the date to May 18 and the time to noon (12:00:00). 1. Move the screen up some until you see the sun. Click on the sun and you will see information about the Sun. What time will the sun rise on this day? Note: Stellarium uses a 24-hour clock so the time as they list it will look something like 21h 33m which means 21:33 or 9:33 pm. 2. What constellation does the sun occupy at the time and date given in Question #1? Recall that you adjust the field of view (FOV), displayed on the Lower Panel, either by using the mouse wheel, or Ctrl-Up/Down, or Cmd-Up/Down (on a Mac). 3. Set the time to 1 hour before the sunrise time from Question #1. Look East to Southeast (by looking East to Southeast, I mean put the space between E and SE on the horizon at the bottom-middle of the screen), and set the FOV to approximately 60o. What planets, easily visible to the naked eye, are above the horizon in the East to Southeast Direction? 4. Double click on the brightest of the planets seen from Question #3. What time did it rise? 5. Now set the time to 3 AM (3h) but keep the date the same and Find Saturn. What constellation is this in? For questions 6 to 12 we will remain at the same time and date. 6. Double click on Saturn (to center on it, if you haven't already). Zoom in until the FOV is just less than 0.05 degree. Notice we can the moons of Saturn! Look at the moon alternatively labeled (SIII). What is its common name? 7. Double click on this moon. What is the diameter of the object (in km)? 8. Find our own Moon (you will have to zoom out quite a bit to see all of it - double click on the Moon to center it). When does it set? 9. According to Stellarium, what is the phase of the Moon? What is its phase age (Moon age)? Recall that to measure the angular distance between two objects in the sky, you either select the protractor tool in the lower panel, or toggle it with Ctrl-A (Cmd-A on the Mac). 10. Measure the angular distance between our Moon and Saturn. (Place your cursor on the center of the Moon and click and drag the cursor to Saturn. As you do this a blue line will appear and get longer as you get to Saturn. Release the mouse button when you are on top of Saturn.) What is their angular separation to the nearest degree? (Geek hint: the more you zoom in, the more precisely you can measure the distances between their centers!) 11. If a pair of binoculars has a field of view (FOV) of 5° and a telescope with a particular eyepiece has a FOV of 0.5°, which will give the best view of M3? Which will give the best view of NGC 7000? (Geek hint: Find the objects, then use the angular measure tool to measure their sizes---in each case, which instrument gives you the best match to the angular sizes of these objects?) 12. Locate the star at RA = 23h 05m and DEC = +15° on your SC001 chart. What is the name of the star? Using Stellarium, is the star above the horizon at 3 AM (03:00) ? Caution: remember my warning about Stellarium and the Skygazer's Almanac, given above! 13. Using the Skygazer's Almanac, which planets are above the horizon at 4:00 am on April 11? 14. Using Stellarium, which planets are above the horizon at at 11:00 pm on July 15? (Geek hint: set the time and date, then control-F each planet in turn to learn if it is above the horizon!) 15. Using the Planisphere, is Betegeuse above the horizon at 10 pm on May 5, 2022? Set Stellarium to that time and date...according to the Stellarium data table, what time does this object rise and set on this date? Cutting/pasting the following may help you when you are submitting your answers. 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) PreviousNext

View Related Questions