- The Web Nebulae
- An overview of nebulae, with color images and links. - 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.
- Interstellar Medium Learning pages - About ISM from history of observation to current status of understanding.
- Interstellar Molecules evolutionary cycle - Evolutionary cycle of Interstellar Organic Molecules - Fullerenes, PAHs, Polyyenes, and biomolecules.
- Nebulae - Part of a larger site on plasma physics.
- Observations of Interstellar Molecules - About observation of Interstellar molecules in the ISM and Physical information obtained from them.
- The UCL Centre for Cosmic Chemistry and Physics - University College London. Research into the chemistry which occurs throughout the universe in interstellar space.
