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 categories of stars in the HR Diagram?

Back

The main categories of stars in the HR Diagram are Main Sequence, Giants, Supergiants, and White Dwarfs.

Front

What type of star is the Sun classified as?

Back

The Sun is classified as a G-type star in the HR Diagram.

Front

Which category of stars contains the most stars?

Back

The Main Sequence category contains the most stars.

Front

What is the temperature range of Blue stars?

Back

Blue stars are the hottest stars, with surface temperatures exceeding 30,000 Kelvin.

Front

What is the temperature range of Red stars?

Back

Red stars are the coolest stars, with surface temperatures below 3,500 Kelvin.

Front

What spectral class do the hottest stars belong to?

Back

The hottest stars belong to the O spectral class.

Front

What spectral class do the coolest stars belong to?

Back

The coolest stars belong to the M spectral class.

Front

What is a White Dwarf?

Back

A White Dwarf is a small, dense star that is the remnant of a star that has exhausted its nuclear fuel and shed its outer layers.

Front

What is a Supergiant star?

Back

A Supergiant star is a very large star that is much more massive than the Sun and has a very high luminosity.