Some Forms of Detection - http://www.phys.canterbury.ac.nz/~phys159/Astr109/Lecture7.htm Research - http://seds.lpl.arizona.edu/~rme/espirit Planets - http://iac.es/galaria/hdeeg/pubs2002/eslabpro14_final.htm Detecting Other Worlds VIII: Radio Detection - http://www.space.com/searchforlife/seti_doyle_020502.html NASA - http://library.gsfc.nasa.gov/
Seeds, Micheal A. Astronomy: The solar System and Beyond. Pacific Grove: Thompson Brooks/Cole, 2002.