Loading...

Messages

Proposals

Stuck in your homework and missing deadline? Get urgent help in $10/Page with 24 hours deadline

Get Urgent Writing Help In Your Essays, Assignments, Homeworks, Dissertation, Thesis Or Coursework & Achieve A+ Grades.

Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support

What are stars made of

08/11/2021 Client: muhammad11 Deadline: 2 Day

Science Lab-What Are Stars Made Of?

What Are Stars Made Of?

Description:

When astronomers first started to study stars, they noticed that stars appeared to have different intrinsic colors. Later, with more sophisticated instrumentation, these color differences were verified to be distinct differences in the amount of light emitted at each wavelength – meaning the difference in color was real, and not perceived. More recently (in the early 20th century), astronomers used spectrographs to separate the light from stars even further, and they noticed that the stars gave off absorption spectra. Different color stars gave off different spectra. It took decades for astronomers to put together the meaning of all these different pieces of data, but eventually they were able to determine what caused the different spectra and what stars are made of.

In this exercise, students will look at stellar spectra and blackbody curves of stars to determine the stars’ temperatures. They will classify some spectra, using a comparison set of spectra. They will also note the peak wavelength of the spectra they classify.

Introduction:

Understanding what information can be gained from observing the light emitted from objects in space is vital to astronomy. One very important phenomenon of light that will be used in this exercise is the spectrum – this is light from an object that has been spread out by wavelength, similar to the way light can be spread out by wavelength when it passes through a prism or dust particles embedded in raindrops. There are two very distinct properties of a spectrum that will be important in this exercise: energy distribution and absorption lines.

The energy distribution curve is sometimes called a blackbody curve because the shape of an energy distribution curve for a star is much light that of a theoretical blackbody. A theoretical blackbody is a substance that absorbs all light incident upon it and re-emits that light at all wavelengths with the peak wavelength of that emission corresponding to the temperature of the blackbody. You will be examining blackbody curves for several stars to determine the peak wavelength of that curve, and, thus, the temperature of the star that emitted that light.

Absorption lines are dark lines where much less light is observed. These occur at discrete wavelengths within the spectrum of a star. The reason that much less light is present is because that light was absorbed by an intervening gas. In the case of a star, the intervening gas is the atmosphere of the star. So, the absorption lines in the spectrum of a star’s light are due to materials found in the atmosphere of the star.

1. Download and save or print out comparison spectra. The Astrophysics Data System (ADS) is a resource that houses electronically scanned refereed publications in astronomy. Find the article written by Jacoby, Hunter and Christian in 1984, published in the Astrophysical Journal Supplement (ApJS). The article is titled “A Library of Stellar Spectra.” The spectra that you are interested in begin on page 259 of this article. The ADS is found at http://adswww.harvard.edu/

2. Describe the differences of the main spectral types. Considering only the letters that denote the spectral class (O, B, A, F, G, K, M), determine the characteristics that separate one class from another based upon their spectra. Be sure to notice both peak wavelength and absorption lines.

3. Go to the ELODIE website to view stellar spectra. ( http://atlas.obs-hp.fr/elodie/ ) Look up and view the spectra of the stars from the list below. Identify the spectral type of each star by comparing the spectrum on ELODIE with the library from the article found in step 1. Be sure to note both the peak wavelength of the curve and any absorption lines you notice.

HD 191984

HD 194244

HD 206778

HD 209747

HD 210418

HD 211976

HD 212754

HD 212943

4. Use the WWT to find each star whose spectrum you identified. Use the research button to find out the correct spectral type for the star by checking the spectral type on SIMBAD.

OPTIONAL Step 5. Write a paper about the determination of spectral classes of stars. Write about what you have learned about the spectra of stars and how the spectra are related to the chemical composition of stars. Include anything you learn about the history of stellar spectral classification.

Homework is Completed By:

Writer Writer Name Amount Client Comments & Rating
Instant Homework Helper

ONLINE

Instant Homework Helper

$36

She helped me in last minute in a very reasonable price. She is a lifesaver, I got A+ grade in my homework, I will surely hire her again for my next assignments, Thumbs Up!

Order & Get This Solution Within 3 Hours in $25/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 3 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 6 Hours in $20/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 6 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 12 Hours in $15/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 12 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

6 writers have sent their proposals to do this homework:

Quick Finance Master
Financial Analyst
Finance Master
Math Exam Success
ECFX Market
High Quality Assignments
Writer Writer Name Offer Chat
Quick Finance Master

ONLINE

Quick Finance Master

I am an elite class writer with more than 6 years of experience as an academic writer. I will provide you the 100 percent original and plagiarism-free content.

$28 Chat With Writer
Financial Analyst

ONLINE

Financial Analyst

As per my knowledge I can assist you in writing a perfect Planning, Marketing Research, Business Pitches, Business Proposals, Business Feasibility Reports and Content within your given deadline and budget.

$38 Chat With Writer
Finance Master

ONLINE

Finance Master

I have worked on wide variety of research papers including; Analytical research paper, Argumentative research paper, Interpretative research, experimental research etc.

$29 Chat With Writer
Math Exam Success

ONLINE

Math Exam Success

I am a PhD writer with 10 years of experience. I will be delivering high-quality, plagiarism-free work to you in the minimum amount of time. Waiting for your message.

$31 Chat With Writer
ECFX Market

ONLINE

ECFX Market

I am an elite class writer with more than 6 years of experience as an academic writer. I will provide you the 100 percent original and plagiarism-free content.

$19 Chat With Writer
High Quality Assignments

ONLINE

High Quality Assignments

This project is my strength and I can fulfill your requirements properly within your given deadline. I always give plagiarism-free work to my clients at very competitive prices.

$44 Chat With Writer

Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam.

Similar Homework Questions

Lexi in the vampire diaries - Starbucks employee training and development - FIN 1 - Bernie madoff powerpoint presentation - Balanced diet assignment pdf - What does strongly typed mean - Discussion Question - Strategic management of technological innovation pdf schilling - Force mass x acceleration - Case history form for speech and language therapy - Poem 7 syllables per line - Blackbody spectrum sim homework answers - How information technology impacts family eldercare and parenting issues - Kelly's personal construct theory emphasizes the notion that - Differentiator with product lifecycle focus - Comprehensive problem 2 tj's specialty shop answers - Speak hands for me - Stractification, minorities and discrimination - Working with political science research methods problems and exercises pdf - The parable of the sadhu summary - Evidence based practice project - Discussion post - Penetration test proposal deliverable 1 rules of engagement - Assig 7 415 - Evaluating Performance - Accounting III- Week 4 Discussion - Essay II - Creative arts - A curriculum based on behaviorist principles is the - In formulating hypotheses for a statistical test of significance, the null hypothesis is often - Mutually exclusive collectively exhaustive - Example of a simple project plan - The birthmark sparknotes - Chemistry vce study design - Protons and electrons in nitrogen - Law exam - Philosophy - Infy adr share price - 58 blackadder road swan view - Nishat textile mills lahore - Which of these are necessary capital investments - Azure service fabric is a _________ service oriented architecture - 1776 david mccullough study guide - Week 8 Homework HSA 551 - 248 woolooware road burraneer - Biometrics db 2 - The new york times company policy on ethics in journalism - Amicide 625 mixing rate per litre - Organizational leadership - Readability Exercise - Burton on the wolds primary school - Key organizational enablers for effective demand management - Elements of drama tension - Which of the following would cause a contra-asset to be credited and an expense debited? - Hybrid aggregate plan - Change of base formula - Who invented homework and school - Business Valuation - Arditex na on chipboard - Minn kota riptide manual - DISCUSSION- DIALYSIS SAFETY - Penn foster microsoft excel graded project - Cell phones are a distraction in school statistics - Jbhifi change of mind - Unhedged foreign currency meaning - According to the negro digs up his past - Backspin revenge 2.0 wheels - Scsa history year 8 - Circular functions graph calculator - Dartford science and technology college - Millon clinical multiaxial inventory iv mcmi iv - A template is provided for you to base your presentation on. - Direct Manipulation - Help today statement of owner's equity - Flow measuring apparatus lab report discussion - Wechsler abbreviated scale of intelligence - Apoptosis khan academy - OT- Journal Analysis 3 - Widney ctc - Special agent oso pop up assignments - Tupac and my non thug life - Company overstepping ethical boundaries for stakeholder agendas - A lady of letters analysis - Everyday in thai language - Romeo and juliet background information - Chlorsig 0.5 eye drops - GUEST SPEAKER REFLECTION - Andrews lane primary school - Calculate the field of view - Classifying using biotechnology worksheet answer key - Dakota digital wiring harness - Griffith university dental school - Us w7 shoe size - Exp 105 personal dimensions of education - Identifying variables - All type ((*+91-9829866507*)) love problem solution molvi ji - Lab report genetic crosses 1 - Father o'leary's velvet cream - Einhard life of charlemagne pdf - Ba oh 2 h3po4