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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

Judge Albie Sachs and Candice Mama discuss traumas of the past and forgiveness in the present
2015-08-05

 

Judge Albie Sachs embraces Candice Mama for her courage in confronting Eugene de Kock, who killed her father.

Two generations. Two stories of triumph. Two South Africans who have displayed immense courage.

Public Dialogue on Trauma, Memory, and Representations of the Past

Judge Albie Sachs and Candice Mama exchanged their experiences of past trauma and subsequent transformation in a public conversation. The event was co-hosted by Prof Pumla Gobodo-Madikizela and The Institute for Justice and Reconciliation (IJR) in Cape Town on Thursday 30 July 2015.

The event was the first instalment in a series entitled Public Dialogue on Trauma, Memory, and Representations of the Past. The theme of the discussion was ‘Intergenerational Dialogue on Trauma and Healing’.

"The aim of these public dialogue events we are co-hosting with IJR is to place the issues of trauma and memory, and the strategies that individuals and communities use to heal, in the public sphere," Prof Gobodo-Madikizela, Senior Research Professor in Trauma, Forgiveness, and Reconciliation Studies at the University of the Free State (UFS) said.

Judge Albie Sachs and Candice Mama in conversation

Former Constitutional Court Judge, Albie Sachs, talked about his participation in South Africa’s liberation struggle, the loss of his right arm in an assassination attempt, and meeting the man responsible – Henri van der Westhuizen. Despite years of exile and extended periods of solitary confinement, Judge Sachs maintains that “we need to acknowledge our history, not be trapped by it.” Judge Sachs also remarked, though, that “we’re seeing too much lamentation, not enough activation.” In a heartrending gesture, Judge Sachs embraced Candice Mama in a hug for her courage in confronting Eugene de Kock, who killed her father.

How poignant then, when Mama said, “I wanted to embrace the brokenness within him,” when she spoke about her meeting with De Kock. By the time I met with Eugene, I could meet him as a human being, not as a villain.” Mama believes that forgiving someone translates into an investment in the person you are forgiving and in your own sanity. She also emphasised the importance of dialogue to move our country forward: “When we share our stories with each other authentically, walls break down.”

This is a stance that Prof Gobodo-Madikizela supports strongly: “When we listen to one another, something unexpected emerges; we encounter the human in each other,” she said. “When we listen with open hearts to each other, we see and experience each other’s humanity.”

Building a bridge between research and society

Referring to the research aspect of the event, Prof Gobodo-Madikizela said that, "in establishing the series of public dialogue events, our vision is to create a bridge between scholarly research and the community at large, on the one hand, and a visual conscience of society, on the other." The UFS is collaborating with the IJR on this research project, which is funded by the Andrew W. Mellon Foundation. The endeavour is led by Prof Gobodo-Madikizela, who also serves as Board Member of the IJR.

 

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