The purpose of this guide is to point out key terms, concepts, and principles that you should know. It is by no means a replacement for you notes or the text book. This guide is not all inclusive. It should serve, however, review for test #4 .
Be able to define key terms at the end of the
chapters 15,16.& 17
. Be able to state the major contribution of astronomers, scientists, etc. in every chapter.
. Be able to answer all the end of the chapter multiple choice self-test questions.
. Be able to repeat sample problems done in class.
. Review your notes and end of chapter summaries.
Read overview six - The Milky Way and other Galaxies
Ch. 15 The Milky Way Galaxy
Be able to state the Historical background, Shape, Size, Age, period of revolution Mass, etc. of the Milky Way Galaxy
Be able to calculate the mass our galaxy
Be able sketch and label the spiral arms of the Milky Way Galaxy.
Ch. 16. Other Galaxies:
Be able to list the types of galaxies.
Be able to sketch and label Hubbles tunning fork diagram of galaxies.
Be able to state the significance of Red Shift of Distant Galaxies.
Be able to distinguish between Active Galaxies, Seyfert Galaxies, Quasars,
What is Hubble's law? What is its significance?
Why is radio astronomy so important?
Who are the pioneers of radio astronomy?
What is the 21 cm hydrogen line? How is it emitted? what is its significance
Be able to compare "Big Bang" vs "Steady State" models.
What are the evidences for or against these cosmological models?
How is the inflationary model of the universe different from the original
Big Bang model?
Be able to calculate the age of the universe.
What is Oblers' paradox? How is it explained?
What is the difference between an open, closed, critical, and oscillatory universes?
Ch. 15-17 Scientists: What are or is the contribution(s) of the following that is related to galaxies or cosmology:
Galileo, Kant, Herschel, Wright, LeMaitre,
Friedmann, Curtis and Shapely, Penzias and Wilson, Gamow, Hoyle, Gould and Bondi, Van de
Hulst, etc.