Interstellar Medium Learning pages
- About ISM from history of observation to current status of understanding.
- http://www-ssg.sr.unh.edu/ism/

Dr. Seth Redfield
- Description and visualizations of the Local Interstellar Cloud, a column density calculator for it, and links to popular articles and research papers.
- http://cobalt.as.utexas.edu/~sredfield/

Observations of Interstellar Molecules
- About observation of Interstellar molecules in the ISM and Physical information obtained from them.
- http://www.chl.chalmers.se/~numa/astrophysics/molecules/molecules.html

The UCL Centre for Cosmic Chemistry and Physics
- University College London. Research into the chemistry which occurs throughout the universe in interstellar space.
- http://www.chem.ucl.ac.uk/cosmicdust/

Nebulae
- Part of a larger site on plasma physics.
- http://fusedweb.pppl.gov/CPEP/Chart_Pages/5.Plasmas/Nebula.html