266 search results for “black hele” in the Staff website
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Laurens HelingScience
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Caitlin BlackScience
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Lindsay BlackFaculty of Humanities
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Karwan Fatah-BlackFaculty of Humanities
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Supermassive Black Holes
Lecture, Studium Generale
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First photo of black hole at the heart of our Galaxy
Finally we know for sure that there is a black hole at the centre of our own galaxy. Today, astronomers unveiled the first ever photo of Sagittarius A*, a super-massive object at the centre of the Milky Way. This picture could only be taken thanks to the cooperation of telescopes worldwide.
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Finding the origin of giant black holes
‘Space Antenna LISA will open an unprecedented window on the Universe,’ says astronomer Elena Maria Rossi. The mission will be the first one to detect Gravitational Waves from space. These can tell us more about the beginning of our Universe and the formation of black holes. With an NWO grant of twelve…
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Dutch researchers uncover hidden supermassive black hole
An international team of astronomers led by Violeta Gámez Rosas (Leiden University) has observed a supermassive black hole hidden in a ring of dust. This discovery fits the idea that the so-called active centers of galaxies are much more similar than observations show, because the viewing angle from…
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Elena Maria Rossi continues her search for the origins of the largest black holes, but now as a professor
Elena Maria Rossi is fascinated by black holes. Her appointment as a professor was a long-held wish, partly because there are so few female professors in her field. ‘My appointment is also a milestone for the Leiden Observatory.’
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Black hole one year later: proof of a persistent shadow
The brightness peak of the ring around M87's supermassive black hole has shifted 30 degrees counterclockwise in a year. This is shown by new images released by the Event Horizon Telescope consortium.
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Dutch astronomers observe giant jets emanating from black hole
An international team of astronomers led by Dutch scientist Martijn Oei has discovered the largest pair of jets from a black hole ever seen. The 'jumbojets' extend a combined length of 140 Milky Ways. The Leiden Observatory played a prominent role in this research. The publication will feature on the…
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Scientists discover the largest stellar black hole in the Milky Way
A European team of astronomers has discovered the largest stellar black hole in the Milky Way. It is more than thirty times as massive as our sun and is located in the constellation of Aquila, about two thousand light-years from Earth. The astronomers stumbled upon the black hole by chance while preparing…
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‘American’ Black Power movement was also active in the Kingdom of the Netherlands
In the 60s and 70s, Black Power groups were also active in the Kingdom of the Netherlands. This is what PhD candidate Debby Esmeé de Vlugt has discovered.
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Black Hole Images as Artifacts of Human Choice | Rijksmuseum Boerhaave Exhibition
Delve into the depths of black hole imaging as anthropologist Rodrigo Ochigame unveils the human decisions shaping its portrayal. Explore four alternative color choices at the 'Towards the Black Hole' exhibit, now showing at Rijksmuseum Boerhaave, Leiden.
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Karwan Fatah-Black launches book series on slavery and emancipation
How do we account for historical power dynamics when writing new histories of slavery and emancipation? What critical methods can we employ when studying preserved archives and collections? A new book series aims to address these questions. The initiators Karwan Fatah-Black and Ilse Josepha Lazaroms…
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First on-campus event for prospective students: ‘Dr. Black’s seminar was so interactive!’
Touring the campus, meeting current students and taking part in an interactive seminar in the Lipsius building. After 1,5 years of online events due to the corona pandemic, a live Student for a Day took place again on Friday 24 September.
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Black holes are sometimes gigantic volcanoes. Martijn Oei earned his PhD on the subject, with honours
Not everything that comes close to a black hole is swallowed by it. Black holes can also hurl material away, and that chance turns out to be considerably bigger than previously thought. Martijn Oei's accidental discovery and his subsequent research on it earned him a cum laude promotion on 12 Decemb…
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Motion of stars near Milky Way's central black hole is only predictable for few hundred years
The orbits of 27 stars orbiting closely around the black hole at the center of our Milky Way are very chaotic. As a result, researchers cannot predict with confidence where they will be in about 462 years. ‘That is astonishingly short,’ says astronomer Simon Portegies Zwart who collaborated on the r…
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50 jaar Universiteit Leiden in Oss
Lecture
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Greedy Supermassive Black Holes
Lecture, Oort lecture
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(Vorsten)graven in brons- en ijzertijd
Lecture
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Dagelijks leven in Nederland voor en na het jaar 0
Lecture
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Willem van der Does sheds new light on the at times pitch-black history of psychiatry
Piercing through the skull with an ice pick, administering electric shocks without an anaesthetic, or applying leeches to the uterus: these may seem like medieval methods of torture, but they are in fact therapies used in medicine. Willem van der Does writes about all of them in his new book. ‘Physicians…
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Astronomers Discover Ancient Solitary Quasars with Mysterious Origins
An international team of astronomers, including Leiden PhD student Elia Pizzati, has observed several ancient quasars that, surprisingly, appear to be floating alone in the early universe (less than a billion years after the Big Bang). Until now, astronomers, based on models, assumed that quasars are…
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Supermassive Black Holes and Where to Find Them
Lecture, Oort lecture
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Emergent Space-Time, Black Holes and Quantum Information
PhD defence
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Moroccan Register of “Slaves” in the Early 18th Century: Enslavement, Blackness and Racial Binary
Lecture
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Research by Leiden archaeologists in The Jordan Times
Recent fieldwork at the vast desert region in north-eastern Jordan has revealed an immensely rich heritage of an area that is difficult to access and archaeologically less known. Professor Peter Akkermans was interviewed about his groundbreaking research in this area, known as the Black Desert.
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On a quest to discover where stellar-mass black holes merge
PhD defence
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Zooming in on Black Holes with a telescope the size of planet Earth
Lecture, Kaiser Spring Lecture
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Jasmijn Rana in Dutch newspaper on why an 'Instagram face' can be problematic
In the article 'Dankzij Instagram hebben jonge vrouwen over de hele wereld hetzelfde gezicht' in the Dutch newspaper NRC of 4 November 2021, Cultural Anthropologist Jasmijn Rana (Assistant Professor at CADS) talks about what she considers problematic about the Instagram face. The article discusses the…
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From Baghdād to Baghpūr: Global Blackness in Medieval Arabo-Asia
Lecture, Research Seminar Europe 1000-1800
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A New Feeling of Unity: Decolonial Black Power in the Dutch Atlantic (1968-1973)
PhD defence
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Model-Assisted Robust Optimization for Continuous Black-Box Problems
PhD defence
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ReaderOnline
Looking for an easy way to compile, order or view readers online? Then meet ReaderOnline. The instructions below will help you on your way.
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How the speed demons of the universe tell us something about the Milky Way
They hurtle along at over a thousand kilometres per second: the fastest stars in the Milky Way. PhD candidate Fraser Evans conducted research into these elusive hypervelocity stars and discovered that they have a lot to teach us, about black holes and supernovae, for example.
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Algorithm Design for Mixed-Integer Black-Box Optimization Problems with Uncertainty
PhD defence
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Working from home
If your work allows it, you can work partly from home and partly at the University. How this combination of working from home and at the University will turn out for you depends on your own working activities and situation and those of your team. This means that tailor-made solutions are needed.
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Book Landscapes of Survival sheds new light on the habitation of the Jordan deserts
December 2020 saw the crowning publication of the Landscapes of Survival project by Professor Peter Akkermans. Its main topic is human habitation in marginal environments like the deserts of the Arabian Peninsula. ‘The people living here built their own society, and they would not have viewed it as…
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How to record with a video crew/in the studio
What do you need to record a knowledge clip in the studio? You can find below a checklist of the materials you need to bring to a studio recording. Keep in mind that this checklist depends on the kind of video you want to record. Always discuss the specifics for producing such a video with your video…
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Practical matters concerning the PhD ceremony
If you are granted permission to defend your thesis at Leiden University, please take into account the rules concerning the PhD ceremony. Below you find an overview of the practical matters.
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God's Waiting Room: Racial Reckoning at Life's End
Lecture, Unfolding Finitudes
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‘Scientists should be careful when interpreting results of AI models’
Anthropologist Rodrigo Ochigame studies how AI is changing the practice of scientific research. From astrophysics to mathematics to climate science, they find that the adoption of new AI models is raising questions about what counts as reliable scientific evidence.
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Slavery excuses: 'Cabinet created its own problem by rushing in'
The excuses for the slavery past? It would have been better if the cabinet had taken some more time on that, thinks university lecturer and Atlantic slavery expert Karwan Fatah-Black. 'Too bad they didn’t wait for the results of the study.'
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Entire examining committee can wear academic dress at PhD ceremonies
Organisation
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Sjoert van Velzen receives Vidi grant to solve 'riddles from the universe'
Minuscule elementary particles from space colliding with Earth can give us an insight into the distant objects they come from. But first, you need to know how to catch them. With a Vidi grant from NWO, researcher Sjoert van Velzen will 'hunt' for neutrinos coming from exploding black holes.
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Leiden’s slavery past laid bare
The Mapping Slavery project will place markers that tell the story of Leiden’s slavery past. Why is this important and what does it mean for today’s society? Before the markers are placed, a panel came together on 24 March to discuss the slavery past of not only the city but the University too.
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‘The COVID-19 crisis just goes to show how things can go wrong’
Ijeoma Uchegbu is Professor of Pharmacy at University College London (UCL). As a female scientist of colour, she was initially reluctant to play an active role in the university’s diversity policy. Until, that is, she had a radical change of heart: ‘I knew it; I had to become an evangelist.'
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Critical Caribbean Thought on Colonial Legacies
The Caribbean as we know it today is fundamentally a product of colonial activity and globalisation. Practically everyone that inhabits the Caribbean has ancestors from different continents due to colonial activity, which profoundly affects the area to this day. Caribbean writers, both in the Caribbean…