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Stellar Spectra
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Stellar Spectra Updated August 2022
Written by: Kathy Gustavson
Grade (Age) level: High School (ages 14-18), UniversityPre-requisites: EM Waves, Spectroscopy, SDSS: Using the Tools of SDSS
This course is to help students focus on their efforts in the task of learning about the spectra of stars.
Sloan Digital Sky Survey produces two types of data, photometric and spectroscopic. The Spectroscopy project will have introduced you to the types of spectra from astronomical objects. "Using the Tools of SDSS" must be completed before attempting this project, which will have you look for patterns in the continuum curves of stellar spectra. You will choose 10-20 spectra to sort based upon patterns you observe. An important part of this project is sharing your data and thoughts with other participants via the discussion forum.
Topic areas: Spectrographs, Signal -to-noise ratios, and sorting spectra using the tools of the Sloan Digital Sky Survey.
About the Sloan Digital Sky Survey:
The Sloan Digital Sky Survey or SDSS is a major multi-spectral imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico, United States. The project was named after the Alfred P. Sloan Foundation, which contributed significant funding.
The data are available for non-commercial use only, without written permission (https://classic.sdss.org/).
The Sloan Digital Sky Survey offers teachers and informal science educators a wealth of astronomical data and images through lesson plans, interactive media, presentations and more.
Have you completed the two prerequisites? They are: 1.) Spectroscopy and 2.) Using the Tools of the Sloan Digital Sky Survey.
A project that is helpful is: Electromagnetic Waves - A Sea of Information (All these projects are in the EIS Academy)In Topic 1 below, you will be directed to the SDSS Voyages site for Stellar Spectra - Comparing Curves.
Before going to the SDSS site, download the assignment given in Topic 1: "Comparing Curves Journal"
After completing the assignment, go to the discussion forum in Topic 1 below and talk about how you decided to sort your curves - what criteria did you use?As you go through the instructions for the activity, you can refer back here for a few clarifications.
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This Voyages "Launch" activity allows you to gather 10 to 20 spectra of stars which were imaged by the Sloan Digital Sky Survey. After accessing the data, you will be asked to look for some general patterns. The amount of information on each spectrum page is dense. Your task is to focus on a few things of your choosing to sort your chosen spectra into groups. The discussion forum should be used to give others an idea of your sorting criteria.
Tasks:
1. Download assignment journal to answer questions as you go through the activity on the SDSS Web page
2. Do the tasks on the webpage, referring back here for any suggestions if you get stuck.
Use the "Constellations Notebook" instead of the "I Have a Starting Place"
(A very useful help video is this link - it explains the constellation notebook, which is what you should use!)
http://voyages.sdss.org/constellations-notebook-help/3. Use the discussion forum to share with others some of your answers to the questions from the assignment journal:
- specifically put your answers to #5, 6, 7, 8 into the discussion forum. As more people share their sorting ideas and questions in the discussion forum, the more helpful it should be to your project.
4. Upload your assignment for comments-
Sloan Digital Sky Survey Voyages Site
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Nine Questions to answers as you do this project. Also use these in the discussion forum.
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From the assignment directly above the forum, Comparing Curves Journal, use questions 5-8 to add to the forum.
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The journal work and participation in the discussion forum will be reviewed before being awarded proficiency.
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Please let us know your thoughts about this course by using the discussion forum below
- What was your favorite activity?
- What was the most important part of the course for you?
- Are there any areas that need improvement?
- How was the length of the course?
- Any additional comments
After you use the discussion forum, please answer the BRIEF survey questions in the link below.
Thank You!!!
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