Notice of Next Meeting

Our next monthly meeting takes place on:

  • Date: Wednesday 23 January 2019
  • Time: 19h00 for 19h30
  • Location: Jhb. Observatory
  • Presenter: TBA
  • Topic: TBA
  • Donation: R20 pp for tea and snacks

Meetings generally last about one and a half hours, and include a Topic of Interest, What’s Up in the Night Sky, and the Main Speaker’s Presentation. Tea and coffee are served afterwards. Visitors are welcome.

Click here for directions and a map to the Observatory

Sky and Braai

Our next monthly Braai takes place on:

  • Date: To Be Confirmed
  • Time: 16h30
  • Location: Jhb. Observatory, Top of the hill at the Herbert Baker Library. Map.
  • Topic: Whats Up – a detailed overview af some objects.
  • Donation: R20 pp for the fire wood. Children under 15 free.


  • 16h30  – Arrival and Fires started
  • 17h00 – Braai
  • 18h00 –  Presentation
  • 18h20 – 10 min Break
  • 18h30 – Viewing
  • 20h00 –  close domes and lock up.

Our fire glows warmly with a spirit of friendship settling to waft delicious aromas that pervade the olfactory nerves, creating intense appeal for taste buds.

Read More.

The murmering and chuckling displays delight, comfort and contemplative joy at what will be seen in the sky tonight. Bursts of joyous laughter bring one back to the chatter and fun of the evening. Do join ASSA JHB on the hill for a lovely evening of sky and braai. Dress warmly, bring along your meat to braai, your condiments, drinks and salads, anything you need for your meal, hmm… fingers were invented before knives and forks? and  oops, do not forget a chair or ‘situpon’. You may bring your own telescope if you want to.



Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared NASA - National Aeronautics and Space Administration's photo.Fri, Dec 14th, 2018 at 3:07pm
The Voyager 2 probe no longer feels the solar wind and is flying through the interstellar space between the stars. It carries a working instrument providing first-of-its-kind observations of the nature of this gateway. Mission operators still can communicate with the probe as it enters this new phase of its journey, but information – moving at the speed of light – takes about 16.5 hours to travel from the spacecraft to Earth. Here's a look at this incredible mission by the numbers: #AGU18
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared Evan Dembskey's post.Fri, Nov 30th, 2018 at 8:06am
I came across this postcard in the USA, and thought it might be of interest.
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared NASA - National Aeronautics and Space Administration's photo.Tue, Nov 27th, 2018 at 9:29am
Our Mars Odyssey orbiter phoned home, relaying the latest news from NASA InSight that indicates that its solar panels are open and collecting sunlight on the Martian surface. Also included in the dispatch: this snapshot from the lander's arm showing the instruments in their new "plain perfect" home. Get the latest:
Astronomy - ASSA Johannesburg Centre
Astronomy - ASSA Johannesburg Centre shared a post.Fri, Oct 5th, 2018 at 8:35am
Triffid Nebula - I shot this from my backyard in Kyalami


Wed, Aug 15th, 2018 at 10:55am
Monthly Meeting
Date: 15 August 2018
Venue: Wits Planetarium
Time: 19h15 for 19h30
Open to ASSAJHB members
Visitors welcome
Limited number of seats available for visitors (non ASSAJHB members)
Visitors Booking Contact : or SMS 084 405 4005
Wed, Aug 8th, 2018 at 3:10pm
August Monthly Meeting date rescheduled .
August Monthly Meeting : 15 August at Wits Planetarium see link for details

In the Night Sky

Our night sky in summer, on any hopeful clear night, offers an ever-changing display of fascinating objects, from stars and constellations to bright planets. Often the moon, and sometimes special events like meteor showers.

November and December were full of fascinating events but the speciality boils down to what man has been up to. We all watch eagerly as space science takes a veritable spot and space adventure draws closer and closer. 2019 will be notable. Man has already landed a satellite on the dark side of the Moon.

With New Horizons we are travelling further than man has ever been and the secrets of the Universe are unravelling before our eyes.

Robots are being made to land on other planets. Scientific instruments are being invented and made to measure, calculate and verify all theories. Is our Universe becoming smaller, or, is man learning to concede and accept?

Yet around us we have Life. We have our wonderful Earth where stars glitter and planets whisper fantasy to our minds. Earth, where our only star keeps us warm and happy by day nourishing all life, and by night, allows us to see the majesty of our Heavens above. To learn and to know!

Moon Phases:

Universe Today

British Astronomical Association