Thursday, Aug 13 – Sunday, Aug 16
▶ Registration is Open ◀
Keynote Speaker: Alan Stern
New Horizons (Pluto Probe) Principal Investigator
will be held Thursday through Sunday Aug 13-16
Keynote: Alan Stern, New Horizons Principal Investigator.
2016 Convention will be August 4-7
John Bortle images from 1970, 71, 72, 74, 77, 78 and 79.
Have now added photos from 1981-84 also, more coming this year...
New: Clear Outside sky forecast.
New: Link to MODIS (Aqua) Aerosol Optical Depth data.
Find what you need on our
Our Links Page features thousands of categorized
links to telescope making and optics fabrication topics.
Our most visited page year-after-year!
to grind your own Newtonian telescope mirror.
Complete plans for a
Newtonian Optical Tube
and a Dobsonian Mount.
Build with homemade or purchased components
(or a mix of both).
New Solar Filter Plans