HR Diagram

Front

What is the HR Diagram?

Back

The HR Diagram, or Hertzsprung-Russell Diagram, is a scatter plot that shows the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What are the main components of the universe ordered from largest to smallest?

Back

Universe, Galaxy, Solar System, Star, Planet.

Front

What characterizes stars in area A of the HR Diagram?

Back

Stars in area A are described as Bright and Hot.

Front

What happens to stars as you move to the left on the HR Diagram?

Back

Stars get hotter.

Front

Which star has the lowest temperature in a given set?

Back

Star C has the lowest temperature.

Front

What best describes area B of the HR Diagram?

Back

Area B is characterized as Brighter and Cooler.

Front

What is the relationship between a star's temperature and its brightness?

Back

Generally, hotter stars are brighter, while cooler stars are dimmer.

Front

What is a main sequence star?

Back

A main sequence star is a star that is in the stable phase of its life cycle, where it fuses hydrogen into helium in its core.

Front

What is a red giant?

Back

A red giant is a large, luminous star that has exhausted the supply of hydrogen in its core and has expanded and cooled.

Front

What is a white dwarf?

Back

A white dwarf is a small, dense star that is the remnant of a low to medium mass star after it has exhausted its nuclear fuel.