Unit 4: Our Universe Retake

Front

What is the Hertzsprung-Russell Diagram?

Back

A graphical representation of stars that plots their luminosity against their temperature, used to classify stars into different categories.

Front

What classification is given to a star with a luminosity of 10^6 L_sun and a temperature of 20,000 K?

Back

Blue Giant

Front

What is a light year?

Back

The distance that light travels in one year in a vacuum, approximately 5.88 trillion miles (9.46 trillion kilometers).

Front

What is used to measure a light year?

Back

The speed of light in the vacuum of space.

Front

What is a common characteristic of all stars?

Back

They are all made of the same basic materials.

Front

In which galaxy is the Sun located?

Back

Milky Way.

Front

What are the primary components of stars?

Back

Helium and hydrogen.

Front

What is the main sequence in the Hertzsprung-Russell Diagram?

Back

A continuous band of stars that ranges from hot, luminous stars to cool, dim stars.

Front

What is the significance of a star's temperature?

Back

It determines the star's color and position on the Hertzsprung-Russell Diagram.

Front

What does luminosity refer to in astronomy?

Back

The total amount of energy emitted by a star per second.