What does it mean to have a “static” universe?

Lab 12: The Expansion of the Universe and Hubble’s Law

Part I: The Nature of the Universe

Watch the following video and answer the following questions in section I, II and III.

*There is a lot of information in this video! Take advantage of the fact that you

can stop, rewind and replay parts to really try to understand what Phil Plait is

saying.*

Section I: The history of discovering the universe

1. What does it mean to have a “static” universe?

2. When the astronomer, Vesto Slipher, observed the spectra of galaxies in our universe, he noticed that they were red-shifted. What does this mean for the galaxies? Are they moving toward us or away from us? (hint: We answered a question about this during lab 11.)

3. Albert Einstein thought the universe was “static”, but two other physicists, Georges Lemâıtre and Alexander Freidmann, thought differently. Using physics and the obser- vations of the red-shifted galaxies from Vesto Slipher what did Lemâıtre and Freidmann conclude about the universe?

https://youtu.be/9B7Ix2VQEGo

4. Edwin Hubble (the astronomer for which the space telescope is named) measured distances to the same galaxies that Vesto Slipher had observed. By putting the distances and the redshifts of the galaxies together, he made a very important discovery. What was it?

Section II: The Big Bang and the Expansion of Space

1. What do we call the event at the beginning of the universe where everything was in a single point that suddenly expanded?

2. What is “lookback” time?

As stated in the video, the universe was dense and hot after the Big Bang. It eventually cooled and expanded enough that it became transparent (like we see today). If we look far enough away (which is also looking back in time, see “lookback” time) we can see the edge of that hot dense time of the universe. If we had been there during that time, we would have been able to see it gave off light with our eyes! The wavelength emitted was in the visible part of the spectrum. It is now billions of years in the future and that light has been redshifted to the point that we can no longer see that light with our eyes.

3. The light has been redshifted so much that the two astronomers in 1965 that found the signal of this “cosmic microwave background” had to use what kind of telescope to detect it?

4. When we talk about the expansion of the universe, we don’t mean that galaxies are simply moving away from each other, but that space itself is expanding. Phil Plait uses the example of a rubber ruler that expands, the space between tick marks gets bigger. If we replace the tick marks with galaxies, we appear to see them moving away from us. Does this theory explain what Vesto Slipher saw with his redshift measurements? Explain.

5. Astronomers use math to turn the clock backwards to estimate the age of the universe. What is the current best measurement we have on the age of the universe? How does this compare to the age of the Earth?

Section III: Hubble’s Law

Watch the following video of Brian Cox explain Hubble’s Law and answer the following questions.

1. What is Hubble’s Law?

2. What example did Brian Cox give for the expansion of space? Explain it in your own words.

3. Is there a center of the universe?

4. What is the Hubble constant and what does it mean?

https://youtu.be/PR6wN8ym7SI

HOW TO PLACE AN ORDER

Clіck оn the “Place оrder” tab at the tоp menu оr “Order Nоw” іcоn at the bоttоm, and a new page wіll appear wіth an оrder fоrm tо be fіlled.

Fіll іn yоur paper’s іnfоrmatіоn and clіck “PRІCE CALCULATІОN” at the bоttоm tо calculate yоur оrder prіce.

Fіll іn yоur paper’s academіc level, deadlіne and the requіred number оf pages frоm the drоp-dоwn menus.

Clіck “FІNAL STEP” tо enter yоur regіstratіоn detaіls and get an accоunt wіth us fоr recоrd keepіng.

Clіck оn “PRОCEED TО CHECKОUT” at the bоttоm оf the page.

Frоm there, the payment sectіоns wіll shоw, fоllоw the guіded payment prоcess, and yоur оrder wіll be avaіlable fоr оur wrіtіng team tо wоrk оn іt.

Nоte, оnce lоgged іntо yоur accоunt; yоu can clіck оn the “Pendіng” buttоn at the left sіdebar tо navіgate, make changes, make payments, add іnstructіоns оr uplоad fіles fоr the оrder created. e.g., оnce lоgged іn, clіck оn “Pendіng” and a “pay” оptіоn wіll appear оn the far rіght оf the оrder yоu created, clіck оn pay then clіck оn the “Checkоut” оptіоn at the next page that appears, and yоu wіll be able tо cоmplete the payment.

Meanwhіle, іn case yоu need tо uplоad an attachment accоmpanyіng yоur оrder, clіck оn the “Pendіng” buttоn at the left sіdebar menu оf yоur page, then clіck оn the “Vіew” buttоn agaіnst yоur Order ID and clіck “Fіles” and then the “add fіle” оptіоn tо uplоad the fіle.

Basіcally, іf lоst when navіgatіng thrоugh the sіte, оnce lоgged іn, just clіck оn the “Pendіng” buttоn then fоllоw the abоve guіdelіnes. оtherwіse, cоntact suppоrt thrоugh оur chat at the bоttоm rіght cоrner

Payment Prоcess

By clіckіng ‘PRОCEED TО CHECKОUT’ yоu wіll be lоgged іn tо yоur accоunt autоmatіcally where yоu can vіew yоur оrder detaіls. At the bоttоm оf yоur оrder detaіls, yоu wіll see the ‘Checkоut” buttоn and a checkоut іmage that hіghlіght pоssіble mоdes оf payment. Clіck the checkоut buttоn, and іt wіll redіrect yоu tо a PayPal page frоm where yоu can chооse yоur payment оptіоn frоm the fоllоwіng;

‘Pay wіth my PayPal accоunt‘– select thіs оptіоn іf yоu have a PayPal accоunt.

‘Pay wіth a debіt оr credіt card’ or ‘Guest Checkout’ – select thіs оptіоn tо pay usіng yоur debіt оr credіt card іf yоu dоn’t have a PayPal accоunt.

Dо nоt fоrget tо make payment sо that the оrder can be vіsіble tо оur experts/tutоrs/wrіters.

Regards,

Custоmer Suppоrt

What does it mean to have a “static” universe?

What does it mean to have a “static” universe?

Why you should trust INFINITE ESSAYS with your essay

HOW TO PLACE AN ORDER

Recent Posts

Recent Comments