1) http://einstein.stanford.edu/gen_int/relativity/qanda.html
has very many questions and answers dealing with
some of the most fascinating subjects in cosmology.
2) http://www2.slac.stanford.edu/vvc/theory/virtual.html
a detailed description of virtual particles,
why they exist, and more. This website is advanced and has some difficult
terms.
3) http://cfa-www.harvard.edu/~jcohn/lya.html
a good interpretation of the Lyman Alpha series.
Provides good diagrams with thorough explanations and examples.
4) http://reactor.engr.wisc.edu/fission.htm
Explanations on nuclear physics. Shows how reactors,
fusion and fission work.
5) http://www.damtp.cam.ac.uk/user/gr/public/cos_home.html
a small website with some fundamental principles
and theories in the world of cosmology today. Includes Relic Radiation
and the Big Bang.
6) http://www.netlabs.net/hp/tremor/index.html
a good website that provides a basic description
of some celestial bodies, dark matter and more. A good site for one
who wants to become acquainted with cosmology
7) http://stardate.org/resources/stars/shields.htm
a good website that concentrates mostly on black holes, but has other
good articles as well.
8 ) http://particleadventure.org/particleadventure/frameless/chart_cutouts/particle_chart.jpg
has an amazing picture that teaches one the fundamentals of particle
types.
9 ) http://pages.sprint.ca/todd/files/astrophysics.html
a website which includes very many topics along with many articles.
Good if you are looking for specific information.
10 ) http://www.aei.mpg.de/research/quantum/
a website centered on quantum gravity and relativity.
11) http://antwrp.gsfc.nasa.gov/apod/astropix.html
provides new and fascinating pictures everyday. This is what cosmology
really looks like.