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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

Boyden observatory celebrates its achievements

2004-10-05

The red carpet will be rolled out and champagne glasses filled tonight when the Boyden Observatory outside Bloemfontein will launch the first phase of the new science centre.

This phase, which was completed earlier this year, consists of a new auditorium, reception area and paths which connect educational visiting points on the Boyden terrain.

“Over the past two years the Boyden Observatory has been re-sited as a research, educational and public facility. The new facilities are now being utilised for educational and public programmes. The 1,5m Boyden telescope has also recently been upgraded and is used for research purposes,” says Dr Matie Hoffman from the University of the Free State’s (UFS) Department of Physics, who is responsible for the management of the centre.

“The Boyden Observatory is a unique facility of the UFS - we are one of the few universities in the world who has its own observatory,” says Dr Hoffman.

“The main purpose of the science centre is to create enthusiasm for science amongst the public. The centre also has a great educational function and focuses specifically on the improvement of the quality of science education in the Free State,” says Dr Hoffman.

Fund-raising for the planned second phase of the science centre, which will consist of interactive in- and outside exhibition areas, will also start tonight. “After the completion of the second phase the Boyden Observatory will probably become the most accessible and public-friendly observatory in the country and a great asset for the Free State Province,” says Dr Hoffman.

A small robotic telescope, which will be controlled from the University College Dublin in Ireland, will also be installed at the Boyden Observatory this year.

“Just as this year is a significant one for the UFS with its centenary celebrations, so it is also a significant one for the Boyden Observatory. The Harvard University in the United States of America started with the construction of the original 1,5 m telescope in its original form 100 years ago, the telescope was put in place at Boyden 70 years ago and Mr Uriah Boyden – the person who donated the money with which the Boyden Observatory was constructed, was born 200 years ago,” says Dr Hoffman.

The first phase of the science centre was built with funds sponsored by the AngloGold Fund, the Shuttleworth Foundation, the Charl van der Merwe Trust and the Lila Theron Trust. Donations from the Friends of Boyden Observatory and other individuals also contributed to the success of the project.

Those who are interested in educational tours of the science centre can contact Dr Hoffman at (051) 401-2322.

Media release
Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za
5 October 2004

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