Name: ________________________ | DUE 11/24 |
ID number: ________________________ |

How would you test Hubble's law? Answer this question in stages.
As always, be sure to *use your own words* in your answers. The
goal of this exercise is understanding, and using your own words
proves that you understand.

First, how would you test *any* proposed law of nature?
*(HINT: it may help to review Homework 7,
where you tested Kepler's 3rd law.)*

Second, what *is* Hubble's law? Give a brief definition.
*(HINT: Hubble's law is a simple mathematical relationship between
any galaxy's *____________* and its *____________*; what
goes in the blanks, and what is the relationship between
them?)*

Third, how do you go about measuring the two properties of a galaxy
which are related by Hubble's law? *(HINT: at least two different
kinds of observations are required. What are they?)*

Fourth, how do you *use* the results of your measurements to
actually test Hubble's law?

Continue on the back. |

Joshua E. Barnes (barnes@ifa.hawaii.edu) Last modified: November 17, 1999