Two Talks by John Huth - Intro to Celestial Navigation and Climate Change 101

 

Introduction to Celestial Navigation 

 

Before the advent of GPS, sailors on the open ocean had to rely on sightings of celestial objects to find their location on earth.   What used to be a fairly common practice is now in in danger of extinction.    GPS is exceptionally vulnerable to jamming and spoofing.  As a result the US Navy has reinstated courses in celestial navigation.   This introduction outlines the basics of celestial navigation for the novice, and points to directions on how to develop this as a usable skill. 

 

 

Climate Change 101

 

In the news, we mostly hear the classic "both sides" on climate change.    But, the actual science of climate is fascinating and accessible to the educated lay person.    In this presentation, I use the US climate report mandated by Congress as a jumping off point to examine the science of climate.   In addition to the well know greenhouse effect, I look at the uncertainties in climate modeling, and other 'forcing functions', such as volcanic eruptions, variations in solar output, and deforestation. 

 

   

This event is open to paid club members only.  Please RSVP on the club calendar.

 

Prudence