Physical Science 101
Origin of the Universe & Solar System Study Guide

After the "Origin of the Universe & Solar System" lecture and readings you should be able to answer and discuss the following questions.

Who first determined that distant galaxies are either moving towards us or retreating away from us?

How is this rate of approach or retreat measured?

How do we know what type of radiation is being produced by a distant galaxy?

What is the name applied to this technique?

Who first determined the distances to galaxies?

What is a standard candle?

What is the relationship between the rate of retreat and the distance to a galaxy? Draw this relationship in the form of a graph.

Current estimates put the age of the universe at _________________ billion years old.

What were the initial conditions of the universe prior to expansion?

Why are these conditions difficult for us to understand at this time?

What is the name of the theory that currently contains the best explanation for the origin of the universe?

What were the first and only elements to form after the beginning of expansion of the universe? Approximately when did they form?

Describe the sequence of star formation from the first generation of stars to the present generation.

What is a Population I star?

What is a Population II star?

Which Populaton star is the sun?

Which types of stars eventually go supernova?

Why is the process of a star going supernova so important?

How old is the Solar System?

Describe the Nebular Theory of the formation of the Solar System.

What are the general characteristics of the Solar System?

What is a planetesimal?

Describe the Homogenous Accretion Theory of planetary formation

Describe the Inhomogeneous Accretion Theory of planetary formation

What are the problems associated with each of these theories?

Which Accretion Theory is correct?