Latest news with #MeerKAT
Time of India
16 hours ago
- Science
- Time of India
Astronomers fear impact of Musk's Starlink on South Africa mega-telescope observations
By Wendell Roelf CAPE TOWN: Astronomers working with South Africa's SKA telescope are pushing authorities to ensure that any licensing agreement with Elon Musk 's Starlink will protect their groundbreaking observations, a senior scientist said. Discussions to bring Musk's internet service Starlink in South Africa have already been contentious, with parent company SpaceX criticising local shareholding laws while backing equity equivalent programmes. South Africa said it will review its Information and Communication Technology sector rules but will not back down on government policies to transform the economy three decades after white-minority rule ended. Scientists fear South Africa's Square Kilometre Array (SKA-Mid), the world's most powerful radio telescope together with another array co-hosted in Australia, will have their sensitive space observations distorted by Starlink's low-orbiting satellites. "It will be like shining a spotlight into someone's eyes, blinding us to the faint radio signals from celestial bodies," Federico Di Vruno, co-chair of International Astronomical Union Centre for the Protection of the Dark and Quiet Sky, told Reuters in a telephone interview. Di Vruno said the SKA Observatory, where he is spectrum manager, and the South African Radio Astronomy Observatory (SARAO) were lobbying for license requirements to reduce the impact on observations in certain frequency ranges, including some that SKA-Mid uses. That could direct Starlink to steer satellite beams away from SKA receivers or stop transmission for a few seconds to minimise interference, he said. South Africa's current SKA antennae, in the remote Northern Cape town of Carnarvon, use the 350 megahertz to 15.4 gigahertz bandwidth, a range also used by most satellite operators for downlinks. The Independent Communications Authority of South Africa regulator and Starlink did not immediately respond to questions from Reuters about the scientists' concerns. MAJOR OBSERVATIONS South Africa's MeerKAT radio telescope, a precursor to SKA-Mid which will be incorporated into the larger instrument, has already discovered a rare giant radio galaxy that is 32 times the size of the Milky Way. Last year, it found 49 new galaxies in under three hours, according to SARAO. SKA Observatory, an international body, also campaigns for conditions on licensing agreements with other major satellite operators such as Amazon and Eutelsat's OneWeb to ensure quiet skies amid a boom in new satellite launches. "We are trying to follow different technical and regulatory avenues to mitigate this issue on the global stage," Di Vruno said.
Yahoo
a day ago
- Politics
- Yahoo
Astronomers fear impact of Musk's Starlink on South Africa mega-telescope observations
By Wendell Roelf CAPE TOWN (Reuters) -Astronomers working with South Africa's SKA telescope are pushing authorities to ensure that any licensing agreement with Elon Musk's Starlink will protect their groundbreaking observations, a senior scientist said. Discussions to bring Musk's internet service Starlink in South Africa have already been contentious, with parent company SpaceX criticising local shareholding laws while backing equity equivalent programmes. Attaching astronomy-linked licensing conditions may further complicate attempts to introduce Starlink to the country of Musk's birth, where he has already said he is deterred by government Black empowerment policies. South Africa said it will review its Information and Communication Technology sector rules but will not back down on government policies to transform the economy three decades after white-minority rule ended. Scientists fear South Africa's Square Kilometre Array (SKA-Mid), the world's most powerful radio telescope together with another array co-hosted in Australia, will have their sensitive space observations distorted by Starlink's low-orbiting satellites. "It will be like shining a spotlight into someone's eyes, blinding us to the faint radio signals from celestial bodies," Federico Di Vruno, co-chair of International Astronomical Union Centre for the Protection of the Dark and Quiet Sky, told Reuters in a telephone interview. Di Vruno said the SKA Observatory, where he is spectrum manager, and the South African Radio Astronomy Observatory (SARAO) were lobbying for license requirements to reduce the impact on observations in certain frequency ranges, including some that SKA-Mid uses. That could direct Starlink to steer satellite beams away from SKA receivers or stop transmission for a few seconds to minimise interference, he said. South Africa's current SKA antennae, in the remote Northern Cape town of Carnarvon, use the 350 megahertz to 15.4 gigahertz bandwidth, a range also used by most satellite operators for downlinks. The Independent Communications Authority of South Africa regulator and Starlink did not immediately respond to questions from Reuters about the scientists' concerns. MAJOR OBSERVATIONS South Africa's MeerKAT radio telescope, a precursor to SKA-Mid which will be incorporated into the larger instrument, has already discovered a rare giant radio galaxy that is 32 times the size of the Milky Way. Last year, it found 49 new galaxies in under three hours, according to SARAO. SKA Observatory, an international body, also campaigns for conditions on licensing agreements with other major satellite operators such as Amazon and Eutelsat's OneWeb to ensure quiet skies amid a boom in new satellite launches. "We are trying to follow different technical and regulatory avenues to mitigate this issue on the global stage," Di Vruno said.
TimesLIVE
16-05-2025
- Science
- TimesLIVE
UKZN's youngest PhD graduate 'unlocks secrets of gravity'
At 26 years old, Dr Shavani Naicker was the youngest doctoral graduate at the University of KwaZulu-Natal (UKZN) during its 2025 autumn graduation ceremonies — an achievement earned with a PhD in applied mathematics, specialising in astrophysics. Naicker's academic journey has been entirely home-grown, completing her BSc, BSc Honours and MSc degrees at UKZN — all summa cum laude. UKZN said her doctoral research, conducted under the guidance of Prof Sunil Maharaj and Dr Byron Brassel through the Astrophysics Research Centre (ARC), delved into the intricate theories of Einstein-Gauss-Bonnet gravity, part of Lovelock gravity, a higher-dimensional extension of Einstein's General Relativity. 'Lovelock gravity introduces higher-order curvature terms into the equations of gravity,' said Naicker. 'Studying these helps us understand gravitational interactions in extreme conditions, such as near black holes or in the early universe. My work contributes to uncovering the gravitational dynamics of astrophysical objects in higher dimensions, which could address some of the unresolved questions in cosmology and quantum gravity.' UKZN said her work produced new exact solutions to complex field equations — earning praise for its potential to shed light on how stars and black holes behave in extreme conditions. Maharaj, director of the ARC, called her research 'critical in understanding gravitational phenomena' and said it offers 'deep insights into the behaviour of stellar models'. Brassel, who taught and supervised Naicker over the years, described her as 'an astute student' and said he hopes their collaboration continues. Naicker is now a postdoctoral fellow at the ARC, supported by the National Research Foundation, and aims to one day become its director. Her work aligns with major scientific projects such as the MeerKAT and Square Kilometre Array telescopes. 'Obtaining a PhD in applied mathematics with a specialisation in relativistic astrophysics is the realisation of a lifelong dream,' said Naicker. 'It stands as testament to years of hard work, resilience and an enduring curiosity about the universe. I hope my journey inspires others — especially young women — to explore the fascinating world of science, technology, engineering and mathematics.'
eNCA
13-05-2025
- Science
- eNCA
S.Africa's vast radio telescope draws new generation to the cosmos
When Lungelo Zondi first learnt about stars and galaxies at primary school in South Africa, she dreamt of having a live feed into the universe for uninterrupted space exploration. Today, aged 25, her childhood vision has pretty much come true. From her desk in Cape Town, Zondi monitors one of the world's largest radio telescopes, the MeerKAT, made up of 64 giant white dishes that stand in a semi-desert region 600 kilometres away. Through the screen of her computer, she can tune into radio signals emitted by stars and galaxies light-years away using the massive antennae that are 13.5 metres in diametre and turned up to the heavens. "This is so interesting and fascinating: we're collecting data from the universe," Zondi said of the job of telescope operator at the South African Radio Astronomy Observatory (SARAO) that she started just two months ago. Since 2005, SARAO has awarded 1,369 bursaries to students of applied mathematics, computer science, astrophysics and other subjects. The bubbly engineering student is among them and part of a young generation of South Africans now able to look into the cosmos since the 2018 inauguration of the MeerKAT super radio telescope, which put the country on the map of global astronomy. - World's most powerful - As impressive as they are, the 64 dishes of the MeerKAT are just the start of an even bigger project, the Square Kilometre Array (SKA) Observatory that will be the world's most powerful radio telescope when it is completed by 2030. AFP | MARCO LONGARI The project will hook up another 133 South African dishes and more than 131,000 antennae based in Western Australia to allow humans to look back billions of years to when the "first stars and galaxies started lighting up the darkness", according to SKAO. In the seven years since it was launched in the remote and sparsely populated Karoo region, MeerKAT has already "pushed the boundaries of scientific knowledge," said Adrian Tiplady, SARAO deputy managing director. Its feats include groundbreaking radio images of the centre of the Milky Way, the discovery of immense radio galaxies stretching across millions of light-years, and the tracking of cosmic ripples through spacetime. And with the MeerKAT programme to help train young South Africans, it is also keeping an eye on its future. "It really covers the broad base of skills needed to actively participate in a global astronomy enterprise," Tiplady said. "It has meant that the youth of South Africa now are excited about science, engineering and technology. We've really grown from a handful of radio astronomers some 10 or 20 years ago to a thriving and diverse community," he said. An astrophysics group at the University of the Western Cape has benefited. In 2011, "it started with just one South African faculty (member) at the time… and one student doing the PhD", Mario Santos, 50, professor in the university's physics and astronomy department, said. "Now we have about 25 students and six faculty members," he added, saying the growth was "completely" linked to MeerKAT's development and South Africa's selection as SKA host. - Time machine - In the control room at SARAO's offices in Cape Town, Zondi and her colleagues monitor the health of the antennae and send them instructions to execute observations requested by scientists from all over the world. AFP | MARCO LONGARI There have been more than 1,200 submissions for observation time since 2019, with the biggest share from local research teams, Tiplady said. "The world is watching us, so we have to make things perfect," said Sipho Molefe, another telescope operator. The 34-year-old studied electrical engineering and never imagined he would be working in astronomy. "It makes people dream," he said. "There's a feeling that we're contributing to a bigger and larger environment in terms of information and development of technology." The quiet and empty Karoo from where the MeerKAT's sensitive antennae listen to the universe was identified as holding tremendous potential for South African astronomy in the 1990s. The facility operates in a "radio quiet zone" where radio waves, cell phone signals and wireless connections are strictly controlled to prevent interference with the telescope's tracking. 'When we're building a telescope, it's almost like building a time machine," Tiplady said. "Something like MeerKAT or the SKA will detect radio signals that have been travelling through the universe since the birth of the universe itself.' 'It's a true marvel of scientific and technical excellence... and we're proud of South Africa to be a part of this,' he told AFP. jcb/br/kjm
Yahoo
13-05-2025
- Science
- Yahoo
S.Africa's vast radio telescope draws new generation to the cosmos
When Lungelo Zondi first learnt about stars and galaxies at primary school in South Africa, she dreamt of having a live feed into the universe for uninterrupted space exploration. Today, aged 25, her childhood vision has pretty much come true. From her desk in Cape Town, Zondi monitors one of the world's largest radio telescopes, the MeerKAT, made up of 64 giant white dishes that stand in a semi-desert region 600 kilometres (370 miles) away. Through the screen of her computer, she can tune into radio signals emitted by stars and galaxies light-years away using the massive antennae that are 13.5 metres (44 feet) in diametre and turned up to the heavens. "This is so interesting and fascinating: we're collecting data from the universe," Zondi said of the job of telescope operator at the South African Radio Astronomy Observatory (SARAO) that she started just two months ago. Since 2005, SARAO has awarded 1,369 bursaries to students of applied mathematics, computer science, astrophysics and other subjects. The bubbly engineering student is among them and part of a young generation of South Africans now able to look into the cosmos since the 2018 inauguration of the MeerKAT super radio telescope, which put the country on the map of global astronomy. - World's most powerful - As impressive as they are, the 64 dishes of the MeerKAT are just the start of an even bigger project, the Square Kilometre Array (SKA) Observatory that will be the world's most powerful radio telescope when it is completed by 2030. The project will hook up another 133 South African dishes and more than 131,000 antennae based in Western Australia to allow humans to look back billions of years to when the "first stars and galaxies started lighting up the darkness", according to SKAO. In the seven years since it was launched in the remote and sparsely populated Karoo region, MeerKAT has already "pushed the boundaries of scientific knowledge," said Adrian Tiplady, SARAO deputy managing director. Its feats include groundbreaking radio images of the centre of the Milky Way, the discovery of immense radio galaxies stretching across millions of light-years, and the tracking of cosmic ripples through spacetime. And with the MeerKAT programme to help train young South Africans, it is also keeping an eye on its future. "It really covers the broad base of skills needed to actively participate in a global astronomy enterprise," Tiplady said. "It has meant that the youth of South Africa now are excited about science, engineering and technology. We've really grown from a handful of radio astronomers some 10 or 20 years ago to a thriving and diverse community," he said. An astrophysics group at the University of the Western Cape has benefited. In 2011, "it started with just one South African faculty (member) at the time… and one student doing the PhD", Mario Santos, 50, professor in the university's physics and astronomy department, said. "Now we have about 25 students and six faculty members," he added, saying the growth was "completely" linked to MeerKAT's development and South Africa's selection as SKA host. - Time machine - In the control room at SARAO's offices in Cape Town, Zondi and her colleagues monitor the health of the antennae and send them instructions to execute observations requested by scientists from all over the world. There have been more than 1,200 submissions for observation time since 2019, with the biggest share from local research teams, Tiplady said. "The world is watching us, so we have to make things perfect," said Sipho Molefe, another telescope operator. The 34-year-old studied electrical engineering and never imagined he would be working in astronomy. "It makes people dream," he said. "There's a feeling that we're contributing to a bigger and larger environment in terms of information and development of technology." The quiet and empty Karoo from where the MeerKAT's sensitive antennae listen to the universe was identified as holding tremendous potential for South African astronomy in the 1990s. The facility operates in a "radio quiet zone" where radio waves, cell phone signals and wireless connections are strictly controlled to prevent interference with the telescope's tracking. 'When we're building a telescope, it's almost like building a time machine," Tiplady said. "Something like MeerKAT or the SKA will detect radio signals that have been travelling through the universe since the birth of the universe itself.' 'It's a true marvel of scientific and technical excellence... and we're proud of South Africa to be a part of this,' he told AFP. jcb/br/kjm
