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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

UFS chemist invited by UNESCO to present lecture at World Science Forum in Budapest

2015-12-07

From the left are: Dr Jean-Paul Ngome Abiaga from UNESCO, France; Abdoulaye Ibrahim, also from UNESCO in France; and Truidie Venter, a young scientist from the Department of Chemistry at the UFS.
Photo: Supplied

Dr Truidie Venter, a young scientist from Inorganic Chemistry in the Department of Chemistry at the University of the Free State (UFS), returned recently from presenting a lecture at the 7th World Science Forum, held in Budapest, Hungary. She was one of the few young researchers world-wide who were invited to attend the forum.

In her capacity as a young female researcher from Africa, Truidie was invited by UNESCO to present her views on science in diplomacy at this event. Her talk focused on collaboration between researchers from different countries, and the challenges faced by young researchers in Africa, and served to initiate discussions between young researchers concerning international, interdisciplinary scientific cooperation.

The Science Forum, an international conference dedicated to science and knowledge, was held in Budapest from 4-7 November 2015. This interdisciplinary gathering is supported by the United Nations Educational, Scientific and Cultural Organization (UNESCO), the International Council for Science (ICSU), and other partners, and is aimed at providing an occasion for representatives of science, politics, international organisations, industrial and financial decision makers, international science forums, and science academies to meet and exchange views.

More than nine hundred delegates from 108 countries took part in this event. The speakers included Her Royal Majesty Princess Sumaya Bint El Hassan, President of the Royal Scientific Society of Jordan, Dr Irina Bokova, the Director-General of UNESCO, Prof Sir Peter Gluckman, first Chief Science Advisor to the Prime Minister of New Zealand, Prof Ene Ergma, former President of the Riigikogu (Estonian Parliament), and Ms Naledi Pandor, Minister of Science and Technology of South Africa.

At the conclusion of the forum, a declaration was accepted regarding the renewal of the scientific community’s commitment to the responsible and ethical use of scientific knowledge in addressing the grand challenges of humankind. This declaration addressed the headings of climate change, new sustainable development paths, disaster risk reduction, scientific advice for policies, international collaboration for capacity-building and mobilisation in the developing world, and balanced investment in science.

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