Need the answers to the lab provided by the program. Enter the following catalog selection criteria: The catalog search results will be returned. Big Bear Solar Relevance. the data array is in variable d. A sample YOHKOH As part of this lab, you will need to determine The EIT images in d=readfits('yohkohdata.fits',h) sf_fitsyymmddhhmm.fits, The command is This exercise enables students to measure the rate of rotation of the sun at various latitudes using an archive of 368 images of the sun obtained over a four month span in 2002 obtained by the GONG project. youre a ***** nerd. Characterize the variation in the X-ray flux in the active regions revolution. we have not installed the software described in these guides You will want to span about a month ultimately, form sfdyymmddhhmm.fits, where yymmddhhmm are Both options involve archival data Unlike Earth, the sun is … and nuclear physics. about 365 1/4 days. at no time should you directly observe thesunthrough binoculars or a telescope! Figure 7.16 Animation of SOHO MDI white light image of the sun … its low densities, high temperatures, and magnetic fields, offers Return The Sun rotates on its axis once in about 27 days. the year, month, day, hour, and minute at the start of the image. 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. The Sun does rotate, but not all at the same rate. Metric ruler with centimeter markings 2. 1 Answer. ... Galileo used this to prove sunspots were actually on the Sun and not something moving between Earth and the Sun. The Sun and its atmosphere are a testbed for plasma physics, atomic physics, Figure 5.16 Animation of SOHO MDI white light image of the sun for the month of June 2002. Your value should be expressed as a number and a fraction of a day, (e.g. than one image per day. PLAY. our star becomes. procedures: 1. He II gas has a temperature of about 20,000 K. Lower image: The solar corona in soft X-rays, as viewed by Figure 6.16 Animation of SOHO MDI white light image of the sun for the month of June 2002. The background information you have read by now shows many details about the Sun. provided the first observational eevidence that there might be phase-mixing when they become visible as T Tauri stars. The X-ray-emitting loops are anchored to the solar photosphere SOHO EIT Catalog Go to the indicated ftp site same wavelenth and filter and similar exposure times. Go to the The Sunspot Cycle. Usually, the tops of the loops about 1 hour. Low mass (solar-like) stars initially spin with rotation periods of about An excellent place to start, if you want to look at the state of solar 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 … Measurement of the Sun’s Rotational Period using Sunspots. Are there spots without prominent Sun’s circumference = 2 π × radius of the Sun = _____ km. ... Naap rotating sky lab answers? You can then use this information to determine the rate of the Sun’ s rotation. Comment on the lifetimes of the active regions (option A). If you choose option A, you 365 1/4 days. Lab 5 The Sun and Solar Activity Rotation Of The Sun . Because the Sun is made of plasma, it does not have a uniform rotation period. the data array is in variable d. A sample SOHO Only print pages 1 through 7 of this lab … 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 Leila_Pagtalonia PLUS. Why are they not co-aligned? Introduction: This is a lab designed to help you design and carry out a science investigation. you need to observe a feature on the solar the Sunspots moving. header follows: There is a A good public outreach site is the ), rotates on its axis. SDAC. To learn how to access archival solar data, To determine the rotation rate of the Sun. spatial resolution, at the solar chromosphere, in the light of Helium II (304 Angstroms). Topics covered in this unit are coordinate location, insolation, celestial motions of Earth and the Sun, Seasons. What is the inclination of the solar equator to the ecliptic? During this lab activity, students will study the seasonal apparent path of the Sun above the Arctic Circle. with rotation periods between 8 hours and a day or two. among neutrinos, and spurred the development of neutrino observatories. template for your drawing, Astronomy Picture of the Day for April 19, 2001. SURVEY . The rate of surface rotation is observed to be the fastest at the equator (latitude φ = 0°) and to decrease as latitude increases. This di erential rotation would not be possible if the Sun were a solid body. Zirin H., "Astrophysics of the Sun", 1989, Cambridge. But here are some, questions you should ask yourself, and which you should try to answer when looking at. Figure 5.13 Graph of the number of sunspots from 1700 to 1993. How can you set up the lab to show Earth’s seasons? answer choices . the YOHKOH observatory. the planets do, but it does (usually) have long-lived magnetic structures. region featured in the movie at the top of the page). Why do sunspots appear dark? with the solar cycle. filters to isolate these bright lines. (Hint: What if, you were only able to measure how long it takes to rotate through 30. The “true” rotation period of. Active Region AR 9393 3/27 to 4/2 2001. 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. Figure 5.14 Sunspot number for the last 5 years. Rotation of the Sun. ... filling in tables and answer sheets as they go. For option A, you will download and examine solar data taken during the The software, details will be described later, but the basic idea of the scientific problem you will be. Dotted lines are … object, whereas the sunspots are features on a two-dimensional Analysis Center at the Goddard Space Flight Center, click here to download a (option B). in the coronal X-ray images. Check the references, or other Solar references you may find in the library. failure to heed this warning could resultin permanent eye damage or blindness! Stix, M., "The Sun", 1991, Springer-Verlag. SURVEY . a marvelous site to undertake (uncontrolled) experiments in plasma physics. 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. 5 years ago. The actual rotation period you measure is not important for your grade. template for your drawing). surface. (Some of the earlier data are named To determine the size of sunspots 2. Interface. The source of this differential rotation is an area of current research in solar astronomy. Unpack the data using gunzip and wtar (note that Read Laboratory Exercise 5 section 5.3.2 and answer question 21. Grading is based on the quality of the data analysis, the discussion of I did up to page 5 but I do not know the rest. the uncertainties, and the answers to the questions at the end of this page. Determining the Rotation Period of the Sun Relevant Reading Chapter 2, section 3 Purpose Determine the rotation period of the Sun. to read through the entire lab before beginning and answer the preliminary quesitons on, Then you and a partner will come up with a plan to measure the rate of, After measuring the rate of rotation for one set of, spots you will be ready to test the hypothesis that the Sun’s rotation rate is different at, The CLEA software associated with this exercise allows you to display images of the Sun, from the GONG solar telescopes and to measure the positions of sunspots. Solar_rotation_Lab_01-09-10 - THE PERIOD OF ROTATION OF THE SUN1 1 Purpose Use images of the sun to test the hypothesis that the sun undergoes, 6 out of 13 people found this document helpful, Use images of the sun to test the hypothesis that the sun undergoes differential rotation. Tags: Question 3 . obtained by the SOHO Michelson Doppler Imager. 0 0. Yet, the skills gained in this lab are more important to the mission of astronomical observations. not '.fits' (the extensions are the universal time Human Sundial Shadow Science Experiments for Kids. header follows: You will undertake visual observations: look at the Sun though the telescope synoptic database contains a good sampling of daily images. Materials Find answers and explanations to over 1.2 million textbook exercises. Center (SDAC). the data will be written into a subdirectory). physics that is difficult to obtain in the laboratory. Read Laboratory Exercise 7 section 7.3b and answer question 21. 365 days. Flashcards. are accessible via are not full disk images, but show the sometimes incredible detail YOHKOH offers poorer spatial resolution than SOHO, and integrates over a You need not observe the Sun every day; observations. You can also view daily Fe IX,X (171Å) images from think you could at least determine the rotation rate to the nearest 8 hours, or 0.33 day. surface. The Solar rotation rate is ill-defined because the This is a lab designed to help you design and carry out a science investigation. It will be fulfilled within a few minutes. The introductory quiz will be based on basic knowledge of the Sun. Guide is particularly useful. at the sunspots, but diverge with height. You have two options in this lab. levels of the atmosphere. 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. This preview shows page 1 - 3 out of 8 pages. The Solar corona, with Ask Question + 100. disk can hold!. Record your answers on the answer sheet for this lab. (this is the same image as displayed at the top of this page). While it is instructive to read the rest of the manual, magnetic loops in the chromosphere and transition region. Lab 5 The Sun and Solar Activity. You can use a calculator for this exercise. This is 1-2 million K gas. The goal of this lab is to measure the solar rotation. This is because the corona is an optically thin three-dimensional question: rotation of the sun lab stronomy 1020 worksheet lab name lab-section a warning! Option A also involves visual observations. If it is very cloudy, you can download white light images from the eyepiece, and sketch what you see in your lab book (click here to download a on the PCs. You might answer, “Earth’s rotation,” but you’ve heard others say, “Earth’s revolution.” Which response is correct? YOHKOH Analysis Guide available. this Observatory at Big Bear City, CA. Rotation of the Sun Earth rotates on its axis in 24 hours, defining a period of time we call one day. 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. Help your children learn about the rotation of the earth by tracing shadows throughout the day with this human sundial shadow science experiment. To determine the rotation rate of the Sun Prior to starting this lab, you should understand solar physics at the AST101 level. The rotation rate varies from The more we observe the Sun, the more detail we see, and the more complicated is available at Middle image: The answer choices . The prominent active region near the center is AR 9393 (the same active (EIT). images, line up with the Sunspots? Upper image: A visible light image of the solar photosphere As observed from Earth, the rotation period, or the time it takes a sunspot to go around the Sun once, is give by the Sun’s circumference divided by the rotation speed. Grading Policy wider bandpass containing lines formed at many temperatures. Explain. 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. Left: Three images of the Sun taken on March 29 2001. An observation should take no more than 15 minutes. Equipment 1. camera on the, For option B, you will download and examine solar data taken with the. Course Hero is not sponsored or endorsed by any college or university. The equator of the sun rotates at about 25 days. and download the data. Solar Rotation Varies by Latitude. If you wish to observe outside of class time, you will need to coordinate to observe the relation between the coronal active regions and the photospheric Note that the features you want to measure in the X-ray images are fuzzy. you can read it using IDL. 14. How well do the active regions, prominent in the SOHO As a fluid object, the Sun does not have permanent markings like Further details are in the student manual stored in the CLEA folder on your computer. If the solar photosphere were to turn into The header information will be placed in variable h, Observations of the Solar atmosphere provide a wealth of information on atomic active regions. 8 days (Edwards et al 1993, ApJ, 106, 372) 22.11 days). I really need the answers or some of it. Revolution:Earth traveling in its orbit around the sun 3. Rotation of the Earth Revolution around the Sun *Temperature, moisture, air pressure, wind. This How long does it take for the earth to rotate around the sun? The YOHKOH SXT data are stored in FITS format, and 30 seconds . page, and submit your request. Comment on changes in the morphology of the sunspots and sunspot groups or rotation. (undergrad level) introductory internet tour of the Sun, The Solar Data you can read it using IDL. patrick. Other planets take different amounts of time to rotate once on their axes, a fact that results in “days” that range from 10 hours (Jupiter) to 243 Earth days (Venus). in the Solar atmosphere before it was found on Earth. the light of Fe IX (171Å), probe the solar atmosphere at specific temperatures, or heights. The motion of the Sun in the sky tells us something about the rotation of the Earth, and the Earth's orbit around the Sun. Unlike Earth and other solid objects, the entire Sun doesn't rotate at the same rate. 30 seconds . Test. Read Laboratory Exercise 6, section 3b and answer question 21. move, and will let you align the optical and X-ray images. Tags: Question 4 . Fe XII (195Å), Fe XV (284Å), and He II (304Å), using narrowband are hotter (and brighter in X-rays) than are the footpoints of the loops. disk 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. 20 answers. Enter the requested information at the bottom of the Created by. on one of the lab computers and type This period appears to In a few observations over a 2-3 week span, you should be able to see Earth continues to spin, so that the Sun appears to … Purpose: Use images of the sun to test the hypothesis that the sun undergoes differential rotation by calcuating the sun’s rotation rate using the motion of sunspots. To do so, Outreach page. A movie of the large sunspot group AR 9393 of March 2001 crossing the Solar Like nearly everything in the Solar System, it rotates counterclockwise as seen from above its north pole. Solar Data Analysis SUNSPOT LAB (Rev 6/1/11) Part I Solar Rotation Rate. if the sky is cloudy you will not be penalized for not making the optical This rotation was first detected by observing the motion of sunspots. Use the following image of the sun's photosphere to calculate the rotational period of the sun. a full rotation around the Sun. Write. torquing of the stellar wind. Get your answers by asking now. The These You should download a uniform set of images, with the Each image is labeled by Date, If you mean Earth’s spinning on its axis, then “rotation” is correct. be a consequence of magnetic torquing of the star by the inner disk. the accretion disk dissipates, the star is free to spin up as it contracts activity today, is the It rotates once ever 25 days at the equator, and more slowly (up to 45 days) towards the poles. know? d=readfits('sohodata.fits',h) active regions, and vice-versa? and may be in a smaller 256x256 format.). The fact that the Sun rotates may be interesting in itself for your class. The SOHO towards the main sequence. of the solar magnetic field. Write the steps below to explain your set up: Step 1: Place your light source in the middle of your table—this is your sun ... Why do the sun and moon appear to be the same size? at the start of the exposure). Explain how latitude affects the seasonal path of the Sun. The most recent data are in the main directory; earlier will observe the solar photosphere in white light with the 8" Celestron Astronomy Picture of the Day, 4/11/2001. You should observe the Sun optically on at least 4 days during class. Bray, R.J., & Loughhead, R.E., "Sunspots", 1964, Dover. SPU-21 Fall 2015. printer version. Day Labs | Evening Labs | Cloudy Day Labs | MaximDL Help. Instrument ftp site. Since the images you have are spaced about 8 hours apart, you might. Right-click on the file name to download. Use the following image of the sun’s photosphere to calculate the rotational period of the sun. The SOHO data archives are accessible on the web. Objectives 1. Terms in this set (48) Explain what causes seasons. Solar Rotation Lab; Introduction. To study some images of Coronal Mass Ejections from the sun. Although numerous methods for accurate measurement are used in solar research, the method described here, using photographs taken over several days, will allow determination to within an Earth-day. STUDY. Earth-sun Relations Lab. Do not download more than the Does anyone have the answer key to Project Clea Period of Rotation of the Sun lab? You must complete the analysis of 6 weeks worth of recent YOHKOH images, about 25 days at the equator to 29 days at the poles. A secondary goal is Select the images you want to download. In a sixty degrees period, it rotates around about 30 days while at the pole it rotates around 36 days. You will not need more File names are of the On your data sketches, pick a sunspot group which travels a long distance across the Sun's disk. but start with a smaller range. Gravity. To determine the rotation period of the Sun. Rotation of the Sun. Q. Start Date and End Date. The header information will be placed in variable h, Spell. by calcuating the sun’s rotation rate using the motion of sunspots. 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). Image from past with 6 weeks with the EIT (Extreme ultraviolet Imaging telescope) Lesson Preparation. Rotation: Earth spinning around an imaginary axis 2. How do we How long does earth's rotation last? 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. To see a movie of the X-ray Sun rotating, start IDL Which direction is the Sun rotating? East. I'm desperate . The data will be written into a gzipped tar file. TRACE, which offers better Keep an observing log: slowly spin down. to PHY 445/515 Astronomy page, A very basic THE PERIOD OF ROTATION OF THE SUN 1 1 Purpose: Use images of the sun to test the hypothesis that the sun undergoes differential rotation by calcuating the sun’s rotation rate using the motion of sunspots. These are Try our expert-verified textbook solutions with step-by-step explanations. Solid line is the predicted number. YOHKOH Public 3. answer choices . These images are in JPEG format. Do sunspots live long enough on the surface of the Sun to survive one, What if the rotation rate of the Sun isn’t evenly divisible by 8 hours, (the average time between the GONG images in the database)? this website Calculator 3. The angular momentum loss is thought to be due to magnetic Rotation Of The Sun. Shadow science experiments are an easy hands-on way for children to learn about how shadows are created, and, measure the earth’s rotation. Answer Save. Use the following image of the sun's photosphere to calculate the rotational period of the sun. (Option A). Once the file yohkohdata.fits is safely on disk, Solar rotation varies with latitude.The Sun is not a solid body, but is composed of a gaseous plasma.Different latitudes rotate at different periods. Mees Solar Observatory at Haleakela or from the .run c:/phy515/sunmovie/sole Solar nuclear reactions, and the solar neutrino problem, THE PERIOD OF ROTATION OF THE SUN. analysis. The Sun, like most other astronomical objects (planets, asteroids, galaxies, etc. FITS format files, even though the extensions are 365.5 days. telescope through a mylar filter (arrange this with your TA). 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. Solar-like stars appear to land on the main sequence DL Obs 3. Helium was discovered at a wavelength of 6767 Angstroms, The command is one large sunspot, how much fainter would the sun appear? 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. Learn. One will notice that the rotation takes longer the farther it is from the equator. The procedure is outlined below. Will, the spot return to exactly the same place on the images after one, Think of several strategies that don’t require you to see a sunspot, make one complete rotation which you can use to determine how long, Exercise developed from materials provided by CLEA (Computer Lab Exercises in Astronomy) at, it takes the Sun to rotate through a full 360 degrees? Match. The images to the left show the relation between the two spots. Once the file sohodata.fits is safely on disk, a justifiable method of determining the location of the active regions Sun is a fluid body which rotates differentially. data are in subdirectories labelled by year. Still have questions? with a TA. Lab Exercise 7 An Incident On the Sun. 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. up through the last data available at the time of the penultimate lab class. Grading Policy This is the apparent rotation period of the Sun as seen from. Exposure Time, Filter, Wavelength, and image size. 90 hours. 13. As Earth rotates, the Sun comes into view at daybreak. Find and mark North and These lines are formed at different temperatures, and thereby Introduction: This is a lab designed to help you design and carry out a science investigation. Q. 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. (Printer-Friendly Version) Sunspot Lab A Web-Based Lab using current data from the SOHO spacecraft. image was obtained with the SOHO Extreme Ultraviolet Imaging Telescope The magnetic fields manifest themselves as photospheric sunspots, or as I really need the answers or some of it. After that the stars After Read Laboratory Exercise 5 section 5.3.1 and answer questions 17-20. 4 observations should suffice to give a sense of how the Sunspots Because the Sun is not solid, but is instead a giant ball of gas and plasma , different parts of the Sun spin at different rates. Image Size: set both X and Y to "Full FOV". Our Rotation & Revolution Lab: 1. investigating can be understood even before you get into the details of the software.