My current research group
http://www.lisa.u-pec.fr/fr

Photodissociation and Photoionization of Astrophysically Relevant Molecules: The Leiden VUV Cross Section Database.
https://home.strw.leidenuniv.nl/~ewine/photo/index.html

U.S. Particle Accelerator School
Education in Beam Physics and Accelerator Technology – A collection of introductory material concerning beam physics, fundamentals of radiation techniques, etc.
http://uspas.fnal.gov/materials/materials-table.shtml

Search for Species Data by Chemical Formula – NIST online database.
http://webbook.nist.gov/chemistry/form-ser

NIST online database of atomic spectra
https://www.nist.gov/pml/atomic-spectra-database

A collection of research papers, books, and information relevant to astrochemistry.
http://www.astrochymist.org/

Updated list of molecules detected in the interstellar medium/circumstellar shells as well as extragalactic molecules.
https://www.astro.uni-koeln.de/cdms/molecules

The RP Photonics encyclopedia of lasers.
https://www.rp-photonics.com/

Air Liquide Safety Data Sheet Library.
http://www.msds-al.co.uk/search/

The ultimate guide to telescopes for amateur and professional stargazers.
https://www.geekwrapped.com/posts/telescope-buying-guide/

The ultimate guide to celestial navigation.
https://reloadyourgear.com/the-ultimate-guide-to-celestial-navigation/