View Single Post
  #3  
Old 12-07-2015, 01:14 AM
mental4astro's Avatar
mental4astro (Alexander)
kids+wife+scopes=happyman

mental4astro is offline
 
Join Date: Jun 2008
Location: sydney, australia
Posts: 5,004
Yes & no, actually.

It is not as simple as that. The features on any surface are more complex than just just a 'reversing' of the shadows. It doesn't matter if you are looking at the Moon or across a beach here on Earth. The angle of the incident light will reveal different features, hide others, and also just swing around the direction of a shadow.

Take the Straight Wall escarpment. It is visible from roughly the first quarter phase, and reducing in prominence as the Sun swings higher in the lunar sky, until it disappears as there is no longer a shadow cast as the Sun illuminates the escarpment wall.

Riles, rifts, fault lines, etc, all depend on the angle of the incident light to be seen in many instances. Some greatly changing in character and the details that become visible. Craters, domes, volcanos, mountains are all affected in the same way.

Alphanumeric features are totally dependent on a unique angle of incident light upon the surrounding lunarscape to the visible, such as the lunar 'X'. The X is only visible for a few hours at a very specific age of the Moon's phase while it is waxing. This same X is not visible during the waning phase.

The Moon has a lot more to offer than most people think. Main problem is we just tend to glimpse over its surface, instead of really taking our time on just one area at a time. One of my joys while I do a sketch of the Moon is see how the length of shadows change over a couple of hours. This can be sufficient to totally change the appearance of the feature that caught my attention in the first place!

Mental.
Reply With Quote