need help

During the early twentieth century, astronomers discovered that galaxies are rushing away from us at huge speeds. The Sombrero galaxy, for instance, was found to be moving away from the Earth at about 1000 km/s. These speeds can be found very accurately from the doppler red shift of spectral lines.

Don't use plagiarized sources. Get Your Custom Essay on
need help
For as low as $13/Page
Order Essay

Hubble concluded that the speed of a galaxy is proportional to its distance – that is, that if one galaxy is three times further from us than another, then it will be moving away at a speed which is three times greater than the other. This result was a huge step forward for astronomers. It implied that in the beginning, the Universe was very much more dense than it is now, and that since the Big Bang all the matter in the Universe has been flying apart. publications/apsnews/200801/physicshistory.cfm

Using a subset of Edwin Hubble’s original data from the 1920’s, you will plot a graph by hand of velocity against distance and draw a straight line (by eye) to the points which “best fits” the data. Should the line should go through the origin? The slope of the line represents velocity/distance, and is known as the Hubble constant Ho. Use your value of Ho to deduce the age of the Universe.

As you prepare this assignment for submission. NOTE:

Marks will be deduced for incomplete and poorly presented work. Steps in the calculations need to be described or explained as required, terms in the equations defined. The graph (by hand) needs to be properly titled and axes labeled, i.e., “V versus D” is not a title, a title should be at least a complete sentence which describes what is being shown.

An estimate for the age of the Universe, 1/Ho is being derived by a “best fit line” through a set of data points. Ho is the Hubble Constant in Hubbles, Law: V = Ho*D.

V is the recessional velocity and D is the distance to far away galaxies. Note that nearby galaxies, our local group, are not necessarily moving away from us but are in mutual gravitation orbits.

Also keep in mind, that the data being plotted is from the 1920’s — Hubble’s original data. The age estimate derived has been vastly refined over the decades through more data, but primarily from a better understanding of stellar properties and assumptions made in distance estimates — Hubble’s distance estimates were flawed resulting in considerable activity in the scientific community — both Astronomy and Earth Science.

Place your order
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more
Live Chat 1 {763} 309 4299EmailWhatsApp

Online Class Help Services Available from $100 to $150 Weekly We Handle Everything