All supermassive black holes in the centres of galaxies appear to have periods when they swallow matter from their close surroundings. But that is about as far as the similarities go. That's the conclusion reached by British and Dutch astronomers from their research with ultra-sensitive radio telescopes…

The first photo of a black hole and measuring anxiety in the brain... From 13 until 22 May we're serving a free slice of science with your pizza.

The increasing competition in the automotive industry requires the tailored, swift development of technologically sophisticated vehicles. Therefore, the computationally expensive state-of-the-art simulation technologies are combined with optimization algorithms. An example of a real-world optimization…

Through a lens that examines the intersection of ageing, gender, class, and migration, this project addresses the “care deficit” in European countries and the employment of migrant women from Latin America to fill this deficit.

The Liverpool care pathway for the dying patient (LCP) is a multidisciplinary tool developed for the dying phase for use in palliative care settings. The literature reports divergent experiences with its application in a nursing home setting related to its implementation and staff competencies. The…

Through a lens that examines the intersection of ageing, gender, class, and migration, this project addresses the 'care deficit' in European countries and the employment of migrant women from Latin America to fill this deficit.

The Event Horizon Telescope (EHT) collaboration receives the 2021 Royal Astronomical Society Group Achievement Award. In April 2019, the EHT team presented the first-ever photograph of the shadow of a black hole. Leiden professor Huib-Jan van de Langevelde has been director of EHT since last year. Three…

The worldwide protests following the police violence in the United States show how deep-rooted and wide-spread racism is across the world. As an academic institution doing research on law & society, the Van Vollenhoven Institute is very much aware of systemic racism and speaks out in support of these…

The Dutch Black Holes Consortium receives 4.9 million euros from NWO for unravelling the mysteries of black holes and other mysteries of the universe. The Astronomy and Society group at Leiden Observatory is affiliated to use the leading research to introduce people of all ages and background, and children…

Black Theatre, activist theatre by and for black South Africans, flourished under apartheid. However, according to Francis Rangoajane, the democratisation of South Africa has in no way diminished the importance of this art form. PhD defence 16 November.

Promotor: W. Jaffe, Co-promotor: K. Meisenheimer

Following the Big Bang, structure in the Universe started collapsing under the force of gravity. This resulted in the formation of the first stars, galaxies and clusters of galaxies.

The composition Popular Archeology: Volca #1 (for percussion) by composer and ACPA PhD researcher Aart Strootman, has been awarded the Black Pencil in Schokland Prize.

What physics controls the properties of quantum matter, such as how electrons flow inside high-temperature superconductors? This question has captivated the physics community and industry for decades, in part due to the great technological potential such materials have, but also because they have resisted…

The thesis addresses the long-term dynamical evolution of hierarchical multiple systems.

The radio sky harbours both galactic and extragalactic sources of arcminute- to degree-scale emission of various physical origins. To discover extragalactic diffuse emission in the Cosmic Web beyond galaxy clusters, one must image low–surface brightness structures amidst a sea of brighter compact fore-…

She bridges the gap between research and practice, has excellent research skills and is pleasant to work with: these words of praise were lavished on Sabine van der Asdonk (29) when she won the Gratama Science Prize 2021 in June. In this interview she explains more about her research into vulnerable…

For only the second time ever, astronomers have linked a neutrino to an object outside our Milky Way. These observations were made using telescopes both on Earth and in space. The researchers, including Leiden astronomer Sjoert van Velzen, were able to trace the neutrino to a black hole that is devouring…

By documenting lexical and morpho-syntactic patterns among P’urhepecha speakers in Mexico and the US diaspora, this project will investigate the sources of language variation. The ensuing online dialect atlas will serve as an online resource for speakers, learners and researchers of the language.

Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.

It all started with demonstrations protesting about the death of George Floyd from police brutality in Minneapolis, but the Black Lives Matter protest is spreading like wildfire across the whole of the US. Every day, thousands of people are taking to the streets. We asked American Studies expert Sara…

The death of George Floyd at the hands of the police may have sparked the Black Lives Matter protests in the United States and here in the Netherlands, but they are about more than that alone. We asked Karwan Fatah-Black, a historian who specialises in the Dutch colonial history, for his analysis. ‘We…

An international team of researchers observed the full extent of the evolution of hot gas produced by an active black hole for the first time. As it evolves, the hot gas encompasses a much larger area than previously thought and even impacts objects residing at great distances. Their study is published…

The Ager Venusinus Project studies the relatively small number of recognized colonial dwellings dated securely to the period of colonization (i.e. the 3rd century BC). With a special interest in the Black Gloss ceramic typochronology

When galaxies collide, do the black holes at their centre form a supersized black hole? This is what we think happens, but it's not as simple as that, according to Simon Portegies Zwart. Zwart, computer scientist and astronomer, has been awarded a VICI grant to research this phenomenon.

The Archaeology and Epigraphy of Jordan’s North-Eastern Desert and Beyond

Now that university buildings have closed, most staff members have started working from home. How are Faculty of Science colleagues faring in their new offices?

The Leiden astronomer Huib van Langevelde) has been selected as the new director of the Event Horizon Telescope (EHT). The EHT is a collaboration involving about 350 scientists from 18 countries. It combines the ALMA array in Chile with sub-millimeter telescopes around the world and published the first…

Members of LUCAS work in various buildings on the Witte Singel-Doelencomplex. The board and the secretariat are housed on the first floor of the P.N. van Eyckhof 3 (building 1165).

Promotor: Prof.dr. S.F. Portegies Zwart

Ms. Kollmann, a home care worker in the Netherlands, is demanding pension and unemployment benefits from the Dutch Employee Insurance Agency (UWV). An exception in the law means that home carers working for private individuals are not automatically entitled to benefits under social security schemes.

Rembrandt Year is concluding with a major exhibition at Museum De Lakenhal. There are still numerous other activities such as lectures, the University Rembrandt Route and the screening of a critical documentary.

The project seeks to come to an understanding of the archaeology of the desert and the ways in which its inhabitants engaged with their constraint, marginal environments through time. It compares and interprets site distribution and community organisation over a long time scale and across several different…

Archaeologist Victor Klinkenberg examined an old Assyrian settlement in Syria, near to the IS stronghold Raqqa. 'Social life was more important than military life.' PhD defence 27 October.

From the new Hortus botanicus podcast to conference call bingo: all the students, lecturers and other members of staff from Leiden University had to switch at breakneck speed to working and studying from home this week. That meant decluttering offices, getting your head around remote teaching and installing…

Today we received this tip from two of our students. It's about how to stay motivated while working from home. We decided to share it with you.

PhD defence

Fathers and mothers bring children up differently. Mothers are more likely to correct children for bad behaviour, for example. This is one of the findings of PhD research by Liesbeth Hallers-Haalboom. PhD defence 7 October.

From time management and mindfulness to online leadership. Nearly all of the training courses, coaching sessions and introductions offered by HRM Learning & Development are now online. Programme coordinator Jasmijn Mioch and trainee Marleen Zwetsloot explain the options.

This thesis presents pioneering work on the panchromatic emission of some of the most luminous galaxies in the early Universe: star forming galaxies and active galactic nuclei.

Samineh Bagheri is the first PhD candidate to defend her thesis fully remotely.

For the first time, scientists have traced back a high-energy neutrino to its source in space. It was produced by a so-called blazar—a supermassive black hole. Researchers from neutrino detector IceCube report this in Science. ‘This is a milestone for neutrino science,’ says physicist Dorothea Samtleben…

The centre of our Galaxy is so dark and dense that it is almost impossible to observe what is inside. By catching the rare hypervelocity stars that are ejected from it, Elena Maria Rossi aims to unveil the mysterious environment around the supermassive black hole inside. But she’ll also be solving another…

Astronomers from Leiden Observatory have developed a new method to find distant quasars and better distinguish them from other objects that look like them, using machine learning techniques. The research result has been accepted for publication in the journal Astronomy & Astrophysics. It is the last…

The project examines the political conflict in the Red River Valley of Louisiana between the majority-black Republican Party and the overwhelmingly white Democratic Party by studying the composition and actions of each party.

From the largest numbers to the smallest molecules and from the oldest galaxies up to the latest algorithms, explore our standout discoveries and most inspiring collaborations from the past year!

For optimization problems, it is often unclear how to choose the most appropriate optimization algorithm. As such, rigorous benchmarking practices are critical to ensure we can gain as much insight into the strengths and weaknesses of these types of algorithms.

Truth is stranger than fiction. In 1997 Juan Maldaceña discovered a remarkable dictionary that translates equation for equation the physics of black holes in string theory into the more conventional physics of quantum mechanics of interacting particles. The remarkable possibility exists that…

Stuck at home with little to do? Don’t worry, because we have the perfect space related activities you can do from home, alone or with your family, in Dutch or English.

From a white leather armchair, on which Barack Obama once sat, Dean Michiel Kreutzer opened the academic year. This time not with visitors, but completely corona-proof via a live stream. In a homely setting, Kreutzer spoke with several guests, including Covid-19 researcher Thomas Hankemeier and brand…