John Duchek's Page -Welcome

I am constantly updating, so watch for changes.....

Screenshot of eyepiece selection software
Eyepiece selection software calculates the % light lost for your pupil size and various telescope/eyepiece combinations.  This software is available on this site with versions for Windows, Linux, and Mac for free.  Also available is a pdf explaining how you can turn your 8" telescope into a 3" telescope with the wrong combination. 
 Links to weatherstations:
Carrizozo/Nogal, NM Weatherstation (Weather Underground)
Carrizozo/Nogal, NM Weatherstation (NOAA)
Carrizozo/Nogal, NM Allsky Cam

Concord/Sunset Hills, MO Weatherstation (Weather Underground)

Links to Linux OS Astronomy Versions:
Astronomy Linux - An amazing amount of linux astronomy
software, bootable from CD, or HD installable

Distro Astro - Linux Astronomy Software with some
 preinstalled windows software thru 'wine'

John's Pictures (on Flickr)-main page:
The Lunar 100 (all but 2, so the Lunar 98)
Hi Resolution wallpaper (1900x1200 approx)
2014 Timelapse, 2015 Timelapse, 2016 Timelapse, 2017 Timelapse

GPS video inserter project
3D Printed Newtonian OTAs
Cloud Detector (Transparency Measurement)
Technique for taking daylight moon photos
Lunar Meteor Detection


 Old talk slide downloads - Over the years I have given a few talks.  Now you can download the slides that went with them as a LibreOffice Impress file.