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05 November 2024 | Story Leonie Bolleurs | Photo Supplied
BOOTES-6 telescope station
The BOOTES-6 telescope station captured a South African sighting of the southern lights, a rare atmospheric phenomenon powered by solar activity.

The northern lights, with their vibrant displays of green, pink, and violet hues, have become a famous attraction in Nordic countries. But in early October, a rare sighting of the southern lights – or aurora australis – was reported in South Africa, surprising many.

Prof Pieter Meintjes, Professor in the Department of Physics at the University of the Free State (UFS), explains that both the northern and southern lights are the result of charged particles from coronal mass ejections (CMEs) on the sun, which are captured by Earth’s magnetic field. "The interaction between magnetic fields and charged particles, such as protons and electrons, is very interesting. The magnetic field forces these particles to spiral around the field lines, ultimately guiding them towards the magnetic poles. As these particles enter Earth’s atmosphere, they collide with atmospheric atoms, causing a beautiful glow. The colours of the aurora indicate which atoms are involved. Typically, hydrogen shines red, while oxygen and nitrogen produce a greenish-blue tinge," he says.

Observing the southern lights

When the display occurs above the northern magnetic pole, it is called the aurora borealis (northern lights) and can typically be observed over regions such as Alaska, Greenland, and the Nordic countries. Above the southern magnetic pole, it is known as aurora australis (southern lights), usually visible over places such as Antarctica and New Zealand. “In extreme cases – when gigantic mass ejections occurred – it can also be observed in mid-latitudes such as South Africa,” says Prof Meintjes.

This recent and rare South African sighting was also captured by the BOOTES-6 telescope station at Boyden Observatory, located just outside Bloemfontein. According to Prof Meintjes, the telescope station has an all-sky monitor – a camera constantly watching the sky for changes and monitoring, among others, cloud cover to ensure that the telescope is always safe from weather. While the monitor was taking photos of the night sky, Prof Alberto Castro-Tirado, a research professor at the Institute of Astrophysics of Andalusia in Spain, picked up the aurora.

The Institute of Astrophysics of Andalusia in Spain, in collaboration with the University College Dublin (UCD), is partnering with the UFS in a research-driven initiative involving the BOOTES-6 telescope station, installed in 2022 during the COVID-19 pandemic. Under a Memorandum of Understanding that was recently renewed for another five years, the UFS and UCD share approximately 30% of the telescope's observing time dedicated to UFS research.

“The DPRT telescope (Dolores Pérez-Ramírez telescope), named after a Spanish astronomer and lecturer at the University of Jaén, contributes significantly to our research, with publications resulting from contributions made by the telescope station and collaborators on gamma-ray bursts, occultations, and transient events co-authored by me and a colleague in the department, Dr Hendrik van Heerden,” notes Prof Meintjes.

Research-driven initiatives

Data from the telescope station is also used for their in-house projects and contributes significantly to the work of their PhD students that will be submitted in the next few years. This includes the PhD work of Helene Szegedi, who uses data from the BOOTES-6 telescope station to study cataclysmic variable systems – compact binaries that erupt regularly. Another PhD student, Joleen Barnard, studies blazar variability under the guidance of Prof Brian van Soelen. Blazars, explains Prof Meintjes, are the core of distant galaxies powered by supermassive black holes. These cosmic jets are pointed towards Earth, but fortunately, they are millions or billions of light years away; otherwise, their impact would be devastating to life on Earth.

News Archive

Triumph of the Human Spirit – a symbol of hope
2015-08-24

Ahmed Kathrada discusses his latest book, Triumph of the Human Spirit.
Photo: Johan Roux

“A triumph of courage and determination over human frailty and weakness; a triumph of the new South Africa over the old.” – Ahmed Kathrada

Ahmed Kathrada, stalwart of South Africa’s liberation struggle, visited the Bloemfontein Campus on 18 August 2015 to launch his latest book, Triumph of the Human Spirit. Turning page after page, the reader travels back with Uncle Kathy – as he is fondly known – to revisit Robben Island with the more than 300 guests he has accompanied since 1994. With each photo – be it a celebrity or school child, head of state or famous artist, friend or royalty – the significance of the island is eternalised, right alongside Ahmed Kathrada.

Message of triumph
“Why this specific title for the book?” Prof André Keet, Director of the Institute for Reconciliation and Social Justice (IRSJ), asked during the book launch. “Robben Island,” Kathrada answered, “should not be remembered only as a place of suffering – that’s history. But the message of Robben Island is the message of triumph – triumph of the human spirit over all sorts of adversities.”

Speaking about Kathrada’s quiet but profound impact, Zaakirah Vadi, editor of the book, said “I think Uncle Kathy does not realise what an inspiration his own strength of spirit is”. The fight for human values and dignity was “honed and perfected in the cells of Robben Island,” she said. “It created the vision for a new South Africa and, as Uncle Kathy puts it, the triumph of the new South Africa over the old.”

UFS surprises Ahmed Kathrada with a birthday cake.
Photo: Johan Roux

Freedom was sacrifice
This triumph was not achieved without a cost, though. “No freedom comes on a platter,” Kathrada said. “Freedom was fought for. Freedom was sacrifice. Through the sacrifices of those who did not survive, we are still here to tell the story.”

And that is exactly what Triumph of the Human Spirit does. As Kgalema Motlanthe writes in the foreword, “This book serves as a preservation of history and a symbol of hope.”

Birthday celebration
Just as the event seemed to come to a close, members of the Student Representative Council carried a candle-lit cake – shaped in the number 86 – toward Kathrada. This surprise was organised by the UFS to celebrate his birthday on 21 August 2015. And, as the audience cheered and sang, Kathrada’s smile spread like a light across the hall.

 

 

 

 

 

 

 

 

 

 

 

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