Steinn Sigurðsson Astro 120 - Homework 4

Set 19 Mar 2008.

Due date Wednesday 26 Mar 2008 at 11 am.

  1. In your own words, summarise the properties and importance of the First Stars.

  2. What was NASA's WMAP mission?
    Look it up, and in your own words, briefly summarise its discoveries.

  3. In your own words, describe what type Ia supernovae are; how they are used as distance indicators, and their role in constraining dark energy.

  4. Briefly summarise in your own words the evidence for there being dark matter in the universe.
    What do we mean when we say it is ``Cold Dark Matter''?

  5. Read the short story Understand by Ted Chiang.
    In your own words, summarise the plot and conclusion.
    Briefly discuss your personal impression of the story and what it tells you.

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