Materials 5 years ago. File names are of the DL Obs 3. Lesson Preparation. THE ROTATION OF SUN AND STARS - To read The Rotation of Sun and Stars eBook, please click the ... answer key, exam test question and solution, guideline paper, exercise manual, quiz test, consumer guidebook, owner's manual, services instructions, restoration guidebook, and so on. Day Labs | Evening Labs | Cloudy Day Labs | MaximDL Help. the year, month, day, hour, and minute at the start of the image. Each image is labeled by Date, images, line up with the Sunspots? Usually, the tops of the loops object, whereas the sunspots are features on a two-dimensional 20 answers. revolution. The magnetic fields manifest themselves as photospheric sunspots, or as I really need the answers or some of it. Does anyone have the answer key to Project Clea Period of Rotation of the Sun lab? Read Laboratory Exercise 5 section 5.3.1 and answer questions 17-20. at the sunspots, but diverge with height. provided the first observational eevidence that there might be phase-mixing This rotation was first detected by observing the motion of sunspots. Only print pages 1 through 7 of this lab … Yet, the skills gained in this lab are more important to the mission of astronomical observations. Flashcards. Lab 5 The Sun and Solar Activity Rotation Of The Sun . The command is towards the main sequence. The images to the left show the relation between the two You might answer, “Earth’s rotation,” but you’ve heard others say, “Earth’s revolution.” Which response is correct? Read Laboratory Exercise 7 section 7.3b and answer question 21. While the Earth takes 24 hours to do one rotation, whether you are standing at the equator or close to either the South or North Pole, the Sun actually rotates fastest at its equator. The goal of this lab is to measure the solar rotation. Lab Exercise 7 An Incident On the Sun. Objectives 1. up through the last data available at the time of the penultimate lab class. physics that is difficult to obtain in the laboratory. Relevance. This is because the corona is an optically thin three-dimensional Center (SDAC). Which direction is the Sun rotating? TRACE, which offers better are accessible via Calculator 3. a full rotation around the Sun. procedures: 1. It will be fulfilled within a few minutes. image was obtained with the SOHO Extreme Ultraviolet Imaging Telescope you can read it using IDL. The Sun's rotation axis is tilted by about 7.25 degrees from the axis of the Earth's orbit so we see more of the Sun's north pole in September of each year and more of its south pole in March. Determining the solar rotation rate from sunspots is easy in principle: you just need to record the time it takes for a spot to go once around the Sun, or perhaps some fraction of the distance around the Sun. 22.11 days). we have not installed the software described in these guides YOHKOH offers poorer spatial resolution than SOHO, and integrates over a The data will be written into a gzipped tar file. This Astronomy Picture of the Day, 4/11/2001. active regions. investigating can be understood even before you get into the details of the software. d=readfits('yohkohdata.fits',h) Interface. the Earth, not the “true” rotation period of the Sun because the Earth is in motion, orbiting around the Sun from west to east as the Sun rotates. ... Galileo used this to prove sunspots were actually on the Sun and not something moving between Earth and the Sun. analysis. To determine the rotation rate of the Sun Prior to starting this lab, you should understand solar physics at the AST101 level. Rotation Of The Sun. 8 days (Edwards et al 1993, ApJ, 106, 372) Our Rotation & Revolution Lab: 1. THE PERIOD OF ROTATION OF THE SUN Student Manual A Manual to Accompany Software for the Introductory Astronomy Lab Exercise Document SM 11: Circ.Version 1.0 Department of Physics Gettysburg College Gettysburg, PA 17325 Telephone: (717) 337-6019 email: clea@gettysburg.edu He II gas has a temperature of about 20,000 K. Lower image: The solar corona in soft X-rays, as viewed by The Sun rotates on its axis once in about 27 days. Lab 5 The Sun and Solar Activity. Equipment 1. The Period of Rotation of the Sun 4 Introduction Though there are ancient Chinese records of spots on the Sun seen at sunset, the solar disk is generally too bright, and … with rotation periods between 8 hours and a day or two. Figure 5.16 Animation of SOHO MDI white light image of the sun for the month of June 2002. The easiest way to determine the period of rotation of the Sun would be to find a sunspot, and just watch it until it comes back to the same place on the images. Determining the Rotation Period of the Sun Relevant Reading Chapter 2, section 3 Purpose Determine the rotation period of the Sun. The fact that the Sun rotates may be interesting in itself for your class. if the sky is cloudy you will not be penalized for not making the optical on one of the lab computers and type This preview shows page 1 - 3 out of 8 pages. Find and mark North and template for your drawing, Astronomy Picture of the Day for April 19, 2001. To see a movie of the X-ray Sun rotating, start IDL to PHY 445/515 Astronomy page, A very basic These are SURVEY . probe the solar atmosphere at specific temperatures, or heights. Early observations of the Sun by Galileo (starting in 1610) revealed the presence of dark spots on the surface of the Sun, known as sunspots. Record your answers on the answer sheet for this lab. Rotation of the Earth Revolution around the Sun *Temperature, moisture, air pressure, wind. Calculating the Sidereal Period of Rotation of the Sun From your Measurements: The value you determine from Earth-based images of the Sun is what is called the, synodic period of rotation. Enter the requested information at the bottom of the (option B). 365.5 days. The Sun and its atmosphere are a testbed for plasma physics, atomic physics, answer choices . Introduction: This is a lab designed to help you design and carry out a science investigation. Use the following image of the sun’s photosphere to calculate the rotational period of the sun. In a few observations over a 2-3 week span, you should be able to see In a sixty degrees period, it rotates around about 30 days while at the pole it rotates around 36 days. ), rotates on its axis. about 365 1/4 days. observations. be a consequence of magnetic torquing of the star by the inner disk. The angular momentum loss is thought to be due to magnetic Explain how latitude affects the seasonal path of the Sun. 1 Answer. torquing of the stellar wind. Mees Solar Observatory at Haleakela or from the Your value should be expressed as a number and a fraction of a day, (e.g. (undergrad level) introductory internet tour of the Sun, The Solar Data spatial resolution, at the 30 seconds . Use the following image of the sun's photosphere to calculate the rotational period of the sun. The equator of the sun rotates at about 25 days. Leila_Pagtalonia PLUS. slowly spin down. data are in subdirectories labelled by year. (this is the same image as displayed at the top of this page). the data will be written into a subdirectory). ... Why do the sun and moon appear to be the same size? 14. at no time should you directly observe thesunthrough binoculars or a telescope! Bray, R.J., & Loughhead, R.E., "Sunspots", 1964, Dover. You can then use this information to determine the rate of the Sun’ s rotation. Solar Rotation Lab; Introduction. but start with a smaller range. and nuclear physics. page, and submit your request. SUNSPOT LAB (Rev 6/1/11) Part I Solar Rotation Rate. will observe the solar photosphere in white light with the 8" Celestron You can also view daily Fe IX,X (171Å) images from Right-click on the file name to download. How can you set up the lab to show Earth’s seasons? Comment on the lifetimes of the active regions (option A). eyepiece, and sketch what you see in your lab book (click here to download a To estimate the Sun's rotation rate, let's assume that the Sun is a flat disk, just like it appears on your copies or sketches. SPU-21 Fall 2015. printer version. the YOHKOH observatory. The most recent data are in the main directory; earlier header follows: There is a The actual rotation period you measure is not important for your grade. EXERCISE 2 - SUN’S ROTATION (20 points) ANSWER SHEET NAME: _____ DATE _____ Overview In this exercise you will measure on your computers screen or by printing out this lab the Sun Spot position over a 24 hour period and compute the rotation of the Sun. Because we see the Sun from the planet, we see the motion of theplanet around the Sun reflected in the apparent motion of the Sunalong the ecliptic, relative to the stars.If the orbit of the planet were a perfect circle, then the planet asseen from the Sun would move along its orbit at a fixed speed, andthen it would be simple to calculate its position (and also theposition of the Sun as seen from the planet). you can read it using IDL. Start Date and End Date. Do not download more than the Your primary goal is to use a series of the GONG images to figure out as precisely as, possible how long it takes the Sun to rotate once, a number we call the sidereal rotation, period of the Sun. Summary: The proximity of the Sun, the nearest star, allows for detailed observations that are impossible to make for the other, far more distant stars. STUDY. past with 6 weeks with the EIT (Extreme ultraviolet Imaging telescope) with the solar cycle. Need the answers to the lab provided by the program. During this lab activity, students will study the seasonal apparent path of the Sun above the Arctic Circle. 365 1/4 days. Big Bear Solar After Middle image: The Exposure Time, Filter, Wavelength, and image size. Shadow science experiments are an easy hands-on way for children to learn about how shadows are created, and, measure the earth’s rotation. To study some images of Coronal Mass Ejections from the sun. The SOHO data archives are accessible on the web. 365 days. this website Comment on changes in the morphology of the sunspots and sunspot groups or about 1 hour. surface. Q. The command is As part of this lab, you will need to determine Figure 5.13 Graph of the number of sunspots from 1700 to 1993. Gravity. Low mass (solar-like) stars initially spin with rotation periods of about to observe the relation between the coronal active regions and the photospheric Helium was discovered on the PCs. You should download a uniform set of images, with the of the solar magnetic field. How do we Once the file sohodata.fits is safely on disk, Check the references, or other Solar references you may find in the library. you need to observe a feature on the solar Tags: Question 4 . How well do the active regions, prominent in the SOHO This is a lab designed to help you design and carry out a science investigation. about 25 days at the equator to 29 days at the poles. spots. move, and will let you align the optical and X-ray images. The “true” rotation period of. (EIT). sf_fitsyymmddhhmm.fits, Go to the indicated ftp site After that the stars SURVEY . is available at Metric ruler with centimeter markings 2. Outreach page. are hotter (and brighter in X-rays) than are the footpoints of the loops. 30 seconds . (Hint: What if, you were only able to measure how long it takes to rotate through 30. Like nearly everything in the Solar System, it rotates counterclockwise as seen from above its north pole. Terms in this set (48) Explain what causes seasons. To do so, This di erential rotation would not be possible if the Sun were a solid body.