Picture of EM spectrum was taken from http://astrosun.tn.cornell.edu/courses/astro201/emspectrum.htm

Picture of radio telescope was taken from http://www.oliverchamber.bc.ca/to_do/tours/observatory/observatory.htm

The picture and information of the first X-ray was taken from http://imagers.gsfc.nasa.gov/ems/xrays.html

The picture and information of the galaxy Centaurus was taken from http://chandra.harvard.edu/

The picture and information of the RXTE satellite was taken from http://heasarc.gsfc.nasa.gov/docs/xte/learning_center/ASM/getting_started.html

The RXTE picture was from http://heasarc.gsfc.nasa.gov/FTP/xte_weather/

The picture of the atom was taken from http://casswww.ucsd.edu/archive/atoms_images1.html
[Note: This page is no longer available on the web.]

The information for the X-ray machine came from http://www.howstuffworks.com/question18.htm

The picture of Chandra was taken from http://imagine.gsfc.nasa.gov/docs/sats_n_data/missions/chandra.html and http://chandra.harvard.edu/about/science_instruments.html

The picture of the chest X-ray was taken from http://info.med.yale.edu/caim/stylemanual/Graphics/Manual/X-ray.GIF

The last Chandra picture was taken from http://chandra.harvard.edu/photo/cycle1/sgr_a/