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Close encounters of the planetary kind

28 January 2021 | Story Igno van Niekerk | Photo Supplied

conjunction_web read more — Pictured from the left: Lucas Erasmus from the Department of Physics, Piet le Roux from the Astronomical Society of SA – Bloemfontein, Quinton Kaplan from the Department of Physics, Thinus van der Merwe from the Astronomical Society of SA – Bloemfontein. Front: Prof Matie Hoffman

In his book, The World is Flat, Thomas Friedman mentions how at first countries, then companies, and eventually communities went global. In true flat-world fashion, a combined team of the University of the Free State (UFS) and the Astronomical Society of South Africa – led by Prof Matie Hoffman, Associate Professor in the Department of Physics – participated in a once-in-a-lifetime event with their counterparts from the Ellinogermaniki Agogi School and the Skinakas Observatory in Greece.

On 21 December 2020, Earth was treated to the Jupiter-Saturn conjunction, when the two planets were only 0.1 degrees apart in the sky. Although conjunctions are regular phenomena, NASA mentions that the great conjunction of Jupiter and Saturn in 2020 was the closest since 1623 and the closest observable since 1226! A pinkie finger at arm’s length could cover both planets – although they were still millions of kilometres apart in space.

Planning started months ahead of the event, with the Ellinogermaniki Agogi Observatory in Greece and the Boyden Observatory in Bloemfontein chosen as the two selected vantage points. From both the Southern and Northern Hemisphere, the conjunction would be broadcast live on YouTube. As with any other technical project on an international scale, challenges arose. For example, in the Northern Hemisphere, it was already dark at 17:45 while the South African astronomers were still basking in sunlight until after 19:00. The conjunction would only be visible from South Africa after 19:30, almost two hours after it would be visible in Athens. The time was well used, with the event including a word of welcome by the Consul General of Greece in South Africa, Ioannis Chatzantonakis, presentations on Saturn and Jupiter, as well as a virtual tour of the Boyden Observatory, emphasising its connection with Greece through its first Director, Stefanos Paraskevopoulos.

On Saturday, 19 December, the teams ‘gathered’ on opposite sides of planet Earth to do a dry run. One could sense the urgency and tension as both teams realised that they would have a huge captive audience on YouTube, and plans had to be made in case of connectivity challenges and if the weather did not allow the conjunction. As preparations progressed, Prof Hoffman was talking to his Greek counterparts and was simultaneously walking around with his laptop to share the landscape and activities via his webcam with colleagues in Greece.

Monday 21 December 2020 – the weather prediction was correct. Clouds covered the Free State sky and scattered raindrops started to fall. Revert to Plan B. A recording made on Saturday evening was shared via the YouTube link, while a live feed of the conjunction from elsewhere in South Africa was arranged. From both sides of the world, information was shared about the history of the venues, as well as the marvel of what was happening in space. Fortunately, expert planetary photographer Clyde Foster was able to share a live feed just after 19:30 from the observatory at his home in Centurion, Gauteng. Those attending the event where visuals and speakers were together on one screen – yet thousands of kilometres apart – watching an event in outer space, will indeed agree with Thomas Friedman: the world is flat. The live-stream event of the conjunction was a catalyst that will result in continued collaboration between the UFS and colleagues in Greece in the field of astronomy.

By the time of this writing, the livestream has reached more than 50 000 people.

Watch: Coverage of the Jupiter-Saturn conjunction here

News Archive

Alumni Voices heralds in festive season with Karl Jenkins production

2013-11-20

The Alumni Voices Chamber Choir, affiliated to the Alumni office of the University of the Free State, heralds in the festive season with a Christmas production with the Drakensberg Boys’ Choir.

Date: 23 and 24 November 2013
Time: 19:30 (23 November 2013)
16:00 (24 November 2013)
Venue: Odeion
Cost: R120

The production by the two choirs, under the direction of Leona Geldenhuys (Alumni Voices) and Johann van der Sandt (Drakensberg Boys’ Choir), is a compilation of new Christmas music by Karl Jenkins.

Two cycles, Stella Natalis, made up from new compositions, and Joy to the World, compiled from well-known traditional Christmas music, are combined in this production.

Stella Natalis (Star of Birth or Star of Origin) celebrates the different aspects of Christmas – Celebro – celebrations, Lullay – the sleeping child, Dona nobis pacem – message of peace, and Jubilate Deo – thanksgiving, forms part of the programme.

The part: JOY TO THE WORLD also includes traditional Christmas music. This fresh and vibrant arrangement of In dulci jubilo, Go Tell it on the Mountain, Silent Night, O Jesu so sweet, Son of Maria and The Virgin Mary had a Baby boy, all new arrangements by Karl Jenkins, promises to be an exciting experience.

This work, which conveys the Christmas message of peace, goodwill and compassion, as well as new beginnings, evokes a colour palette of sound filled with exciting musical inspiration.

The work was written for mixed choir, as well as for an optional choir suitable for children’s voices, trumpet soloist, keyboard, percussion and string ensemble.

The trumpet soloist is Paul Loeb van Zuilenburg, with Johan Cromhout as pianist. Members of the Free State Symphony Orchestra complete the picture.

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