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:

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?  ____________________