Greetings! This is a discussion forum about Cloudy, quantitative spectroscopy, and the physics of the interstellar medium. Please post questions here. If you know answers to questions, let others know. Cloudy's main web site, where you can obtain the code, is here.

Announcement of major updates to Cloudy will be posted here as a special notice. When you join the group you are presented with several email options. You can set the email options to receive only special notices, nothing at all, or everything posted here.

If you have a problem with Cloudy please report it on this site. We will need a complete copy of the input script so that we can reproduce the problem here. You can include the script, and any helper files, in your post.

Acknowledgments Cloudy has been supported by the NSF since 1980, most recently through AST (0908877; 1108928; & 1109061). NASA has provided support through 10-ATP10-0053 and 10-ADAP10-0073), JPL (RSA No 1430426), and STScI (HST-AR-12125.0). Financial support and the generous allotment of time on the high-performance machines of the University of Kentucky Center for Computational Sciences are also gratefully acknowledged.