You're very welcome. Next week I'll show you three of the four basic ways to observe the sun. Full-aperture solar filter, Hershel wedge, and Hydrogen-alpha narrowband. In that order, they go from very inexpensive to spendy. The fourth method is projection, as Siegfried mentioned and that's probably the most inexpensive of all if you are at all handy at making simple fixtures, but also has the worst resolution. Good for large groups, however, especially during partial eclipses. On Thu, Jun 8, 2017 at 7:08 PM, Sue Ellen Ebertz <ebertzs@comcast.net> wrote:

Thanks, Chuck and Mat, for your kind advice.

Best, Shoshana