14.4 The Universe

Front

What happens when a red supergiant runs out of hydrogen?

Back

It collapses and produces a supernova.

Front

What determines the color of a star?

Back

The temperature of the star.

Front

What is the name of our galaxy?

Back

Milky Way.

Front

What does observing a redshift in light indicate?

Back

An object is moving away from us.

Front

What is the luminosity of Antares?

Back

10,000 L.

Front

Define a supernova.

Back

A supernova is a powerful and luminous explosion of a star.

Front

What is the significance of a star's temperature?

Back

It determines the star's color and stage in its life cycle.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our Solar System.

Front

What is redshift?

Back

Redshift is the phenomenon where light from an object is shifted to longer wavelengths, indicating it is moving away.

Front

What is luminosity?

Back

Luminosity is the total amount of energy emitted by a star per unit time.