Now that you have explored the relationship between spectral type, temperature and luminosity, you can further investigate these variables using with the simple animation at the bottom of the website:
http://astro.unl.edu/naap/hr/hr_background1.html
To check for understanding, use the slider bar to answer the following questions below . Answers may be submitted as a text entry or file attachment.
What are the surface temperatures and colors of:
· a hot O2 star? __________________________
· a cool M3 red dwarf?______________________________
· a G2 star like the sun? _________________________
What is the spectral type of a star with:
· a surface temperature of 10,000 K ? ______________________
· a surface temperature of 5,000 K ? _________________________
What is the color of a star with:
· spectral type A0? __________________________________
· surface temperature 4,000 K? ________________________________-
