Exam 24: Beyond Our Solar System

What is the name of the theory which states that the universe is expanding?

Using stellar parallax, astronomers are able to determine the distance to even the most distant stars.

The "true" brightness of a star is called its ________ magnitude.

On an H-R Diagram, the Sun belongs to a group of stars called ________ stars.

Very large red stars, such as Betelgeuse in the constellation Orion, are called ________.

Word Analysis. Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. Choose the option which does not fit the pattern.

The Sun belongs to this class of stars.

How do we calculate or determine the distances to stars? What units do we use and what are the limitations (if any) of the method used for such calculations?

Our galaxy is called the Milky Way.

Stars that radiate short pulses of radio energy are called ________.

If one star is 5 magnitudes brighter than another, it will appear about ________ times brighter than the dimmer star.

The hottest main-sequence stars are also the most massive.

This property of a star can be determined from its color.

Which one of the objects listed below has the largest size?

What property of a star can be determined from its color?

Stars having the same surface temperature radiate the same amount of energy per unit area.

Stars with a surface temperature of 3000 K appear ________ in color.

The Sun is considered an average star.

A first magnitude star is ________ times brighter than a 5th magnitude star.

These stars are produced during a supernova event.