🏷️ LIMITED TIME OFFER: GET 20% OFF GRADE+ YEARLY SUBSCRIPTION →
Log in
HomeClass Notes1,200,000CA670,000

AST101H1 Lecture : Ast lec 1.docx

35 views1 pages
pearraccoon113
23 Apr 2012
School
UTSG
Department
Astronomy & Astrophysics
Course
AST101H1
Professor
na

For unlimited access to Class Notes, a Class+ subscription is required.

elizabethkandelaki and 39782 others unlocked
AST101H1 Full Course Notes
23
AST101H1 Full Course Notes
Verified Note
23 documents

Document Summary

Relative distance: where are we- when listing our address it starts with a number

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents

AST101H1 Lecture Notes - Iceberg, Ecliptic, Observable Universe
carmineguinea-pig695
AST101H1 Lecture Notes - Lecture 1: Ecliptic, Olympus Mons, Microsoft Powerpoint
maroonspider138
AST101H1 Chapter 1: AST 101 Chapter 1 Notes
limeimpala355

Related Questions

The great astronomer Edwin Hubble discovered that all distant galaxies are receding from our Milky Way Galaxy with velocities proportional to their distances. It appears to an observer on the Earth that we are at the center of an expanding universe. Figure 3.64 illustrates this for five galaxies lying along a straight line, with the Milky Way Galaxy at the center. Using the data from the figure, calculate the velocities: (a) relative to galaxy 2 and (b) relative to galaxy 5. The results mean that observers on all galaxies will see themselves at the center of the expanding universe, and they would likely be aware of relative velocities, concluding that it is not possible to locate the center of expansion with the given information.

Figure 3.64 Five galaxies on a straight line, showing their distances and velocities relative to the Milky Way (MW) Galaxy. The distances are in millions of light-years (Mly), where a light-year is the distance light travels in one year. The velocities are nearly proportional to the distances. The sizes of the galaxies are greatly exaggerated; an average galaxy is about 0.1 MlY across.

Which of the following correctly lists our "cosmic address" fromsmall to large?

a.) Earth, solar system, Milky Way Galaxy, Local Group, LocalSupercluster, universe

b.) Earth, solar system, Local Group, Local Supercluster, Milky WayGalaxy, universe

c.) Earth, Milky Way Galaxy, solar system, Local Group, LocalSupercluster, universe

The great astronomer Edwin Hubble discovered that all distant galaxies are receding from our Milky Way Galaxy with velocities proportional to their distances. It appears to an observer on the Earth that we are at the center of an expanding universe. The figure illustrates this for five galaxies lying along a straight line, with the Milky Way Galaxy at the center. Using the data from the figure, calculate the velocities:

(a) relative to galaxy 2 and

(b) relative to galaxy 5.

The results mean that observers on all galaxies will see themselves at the center of the expanding universe, and they would likely be aware of relative velocities, concluding that it is not possible to locate the center of expansion with the given information.