Over the centuries a series of classic experiments in optics and chemistry--some of which you can find online at this site and try for yourselves--established the nature of the stars and our Sun. |
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ir_tutorial/discovery.html |
http://www.ipac.caltech.edu/ |
http://www.ktca.org/newtons/11/infrared.html |