The Astronomical League is composed of over two hundred and forty local amateur astronomical societies from all across the United States. There basic goal is to encourage an interest in astronomy (and especially amateur astronomy) throughout America whether it is through their local astronomical society, school, or their own instruments, and use them to view the beauty in the heavens. Use this site to contact nearby astronomical societies that are members of the Astronomical League!
Links to members.
Worldwide Listing of Planetaria.
Local Chapters and Associated Groups
A typical galaxy like the Milky Way has a magnetic field strength of about 0.000003 Gauss.