Blog

First Quarter Moon

First Quarter Moon

Southern Cape Astronomy Club

First Quarter Moon from Pearly Beach Observatory.

One of the most obvious features of the Moon is that it passes through a number of phases from New Moon to Full Moon and back every 29.53 day (synodic month).  It makes a full circle relative to the background stars every 27.32 days (sidereal month), moving its own apparent diameter (half a degree) in slightly over one hour. This motion is easily noticeable when it occults a brigh star or planet.  On the 1st as well as on the 28th March, the brightest star in the constellation Leo, alpha Leonis or Regulus is occulted by the Moon.  Unfortunately both these events will not be visible from Southern Africa. The line separating sunlight from shadow, is called the terminator, and has nothing to do with Arnold Schwarzenegger and Hollywood. Observing with a telescope this movement can easily be seen by looking at various features on the lunar surface such as mountain peaks and craters.  More detail is visible near the terminator as opposed to viewing the lunar surface when it is fully lit during Full Moon when many of the craters are washed out by sunlight, some even disspearing from view entirly.  

The surface of the Moon has dark and bright markings; flat lava plains and rocky highlands. In many African traditions these markings are said to resemble the figure of a man or woman carrying a bundle of sticks.  In other cultures, a rabbit or bunny amongst other shapes such as a man is pointed out.

First Quarter Moon

Kos Coronaios

Southern Cape Astronomy Club meets at least once a month for stargazing or observation evenings close to new Moon or during astronomical related events. The well-established club is based in Pearly Beach just outside Gansbaai.

View Profile

What is Xplorio?

Xplorio is your local connection allowing you to find anything and everything about a town.

Watch the Gansbaai Video
Read More

Other Articles

Breathtaking Winter Views Across Grootbos and Walker Bay

Breathtaking Winter Views Across Grootbos and Walker Bay

The parting shot this week is actually in two parts taken across the landscape today, which was a glorious winter's day. 

Grootbos Foundation
Warm Up Your Home This Winter

Warm Up Your Home This Winter

As the days get shorter, the colours in your home can make all the difference.

West Coast Inspiration

West Coast Inspiration

Looking for finishes that combine natural beauty with lasting durability? 

Damp Walls? Fix the Cause First

Damp Walls? Fix the Cause First

Noticed damp patches or water stains on your walls? Painting over the problem won't make it disappear.

Overstrand Tourism Diary: 10 - 16 June 2026

Overstrand Tourism Diary: 10 - 16 June 2026

Here’s the latest Overstrand Tourism Diary, filled with music, markets, walks, workshops...

Gansbaai Tourism
Why Renting a Cement Mixer Is Better Than Buying One

Why Renting a Cement Mixer Is Better Than Buying One

For many builders, contractors, and homeowners, a cement mixer is essential for getting the job done. But does it make sense to buy one?

Coastal Hire Gansbaai
See All Articles