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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

Latest information technology employed to make learning in Disaster Management easy

2014-10-20

Prof Dusan Sakulski
Photo: Leonie Bolleurs

Live, colourful, interactive, real-time-calculated. This is how Prof Dusan Sakulski, researcher and lecturer from the UFS’s Disaster Management Training and Education Centre for Africa (DiMTEC), describes his e-learning platform implemented in this department.

Rather than producing research that gathers dust somewhere in a cabinet, Prof Sakulski believes that research should be used to make life easier, not only for society, but also for his students.

This educational civil engineer, who is responsible for information technology implementation in disaster risk management, developed through his research several programs to optimise the three contact sessions DiMTEC students have to attend each year.

One of the initiatives implemented by Prof Sakulski and his daughter Teodora, was the recording, editing and compiling of theoretical lessons and making it available to students online. “Students then don’t have the excuse of missing a class. Furthermore, it allows them to rather focus on group work during contact sessions and to discuss problems they encountered with the work,” he says.

Students also have access to an early-warning system portal for the prediction of hazards, including droughts, floods, rain and temperature. In the disaster-risk environment, this program is very useful, not only for students, but also for practitioners working with this kind of data on a daily basis. The operational and educational application works in real time – with the click of a mouse students and practitioners have access to information on current weather conditions. Indicators for possible natural disasters are also built into this program. Truly a useful application when you are working in the field of disaster risk management.

Difficult and technical data are presented live, with information that is colourful, interactive, real-time-calculated and audible, thanks to embedded mathematical language. In this way, students can learn, memorise and understand their work better.

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