HR Diagram

Front

What is the HR Diagram?

Back

The Hertzsprung-Russell diagram is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What category contains the most stars in the HR Diagram?

Back

Main Sequence.

Front

What does the HR Diagram graph in relation to stars?

Back

The HR Diagram graphs stars' luminosity and temperature.

Front

What type of galaxy is the Milky Way?

Back

Spiral.

Front

Which star has the lowest temperature in a given set?

Back

Star C.

Front

What spectral class does our star, the Sun, belong to?

Back

G.

Front

What are the main regions of the HR Diagram?

Back

The main regions are the Main Sequence, Red Giants, Supergiants, and White Dwarfs.

Front

What is a Red Giant?

Back

A Red Giant is a luminous giant star that has exhausted the 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 remnants of a low or medium mass star after it has exhausted its nuclear fuel.

Front

What is the significance of the Main Sequence?

Back

The Main Sequence is where stars spend most of their lives, fusing hydrogen into helium in their cores.