Question
Which of the following physical properties of stars are plotted on an HR diagram?
Absolute brightness and size
Apparent magnitude and mass
Apparent magnitude and luminosity
Absolute brightness and temperature
Absolute brightness and size
Apparent magnitude and mass
Apparent magnitude and luminosity
Absolute brightness and temperature
Answers
GPT-4o mini
The properties plotted on an HR (Hertzsprung-Russell) diagram are **absolute brightness (or luminosity) and temperature**. Therefore, the correct answer from your options is:
**Absolute brightness and temperature.**
This means that stars are plotted based on their luminosity (or absolute magnitude) on the vertical axis and their surface temperature (or spectral type) on the horizontal axis.
**Absolute brightness and temperature.**
This means that stars are plotted based on their luminosity (or absolute magnitude) on the vertical axis and their surface temperature (or spectral type) on the horizontal axis.