September 2017
M T W T F S S
« Oct    
 123
45678910
11121314151617
18192021222324
252627282930  

Pages

Chasing Galileo - 21-day old moon comparison

My sketch of the moon same lunar day as Galileo’s sketch

Image take at eyepiece of 70mm TV Ranger while sketching on 7/14/09

Galileo’s drawing of the third quarter moon was made on December 18, 1609 according to widely accepted dates calculated by lunar scientist Ewen Whitaker. He used the solar colongitude and [...]

Chasing Galileo – sketches of the five-six day moon

Six-day old waxing moon

The six-day waxing gibbous moon is visible for many hours in the evening – perfect for lunar observing and sketching. The time of my sketch was closer to the sixth day than the five day old moon. I had a hard time identifying craters using either lunar days! Note how much [...]