I. Physics                    II. Chemistry                  III. Astronomy

I. Physics

http://www.asu.edu/lib/noble/scirefrm/

http://www.refdesk.com/factsci.html

http://www.alcyone.com/max/reference/physics/

http://wwwinfo.cern.ch/asd/geant4/G4UsersDocuments/UsersGuides/PhysicsReferenceManual/html/node1.html

http://www.physlink.com/index.cfm

http://www.physlink.com/index.cfm

http://www.dctech.com/physics/reference.html

http://www.treasure-troves.com/physics/

http://www.sc.edu/library/science/elphyref.html

http://www.library.ucsb.edu/guides/phys-gd.html

II. Chemisty

http://www-sci.lib.uci.edu/HSG/GradChemistry.html/

http://www.anachem.umu.se/eks/pointers.htm

http://library.thinkquest.org/2923/

http://www.chem.ucla.edu/chempointers.html

http://www.library.adelaide.edu.au/guide/sci/Chemistry/index.html

http://library.thinkquest.org/3659/

http://mtntchem.mtech.edu/chem1166/Interesting%20chemistry%20reference%20Web%20Sites.htm

http://guides.library.fullerton.edu/chemistry/referenc.htm

http://www.acs.org/recommended/general.html

http://users.pandora.be/synthesis/worgche.html

III. Astronomy

http://www.ksellars.demon.co.uk/Aassign4.html

http://spacelink.nasa.gov/NASA.Projects/Human.Exploration.and.Development.of.Space/.index.html

http://www.winchestermass.org/astroref.html

http://www.spaceref.com/

http://www.space.com/

http://www.refdesk.com/space.html/

http://www.academicinfo.net/astroref.html/

http://www.stella2000.com/vp.htm

http://islab.sas.ntu.edu.sg:8000/islab/link/projects98/AstroRef/Intro.htm

http://www.pdantic.com/astrohtm.htm

http://www.ipl.org/ref/RR/static/sci02.00.00.html