Leiden astronomy Master's student Arend Moerman has received an A+ for his thesis research on the simulation of chaotic interactions of three black holes. The simulations, which he carried out together with his Leiden and Oxford colleagues, show that lighter black holes tend to slingshot each other…

A revolutionary supercomputer with energy-efficient parts that are available in the shops. Professor of Computational Astrophysics Simon Portegies Zwart has been awarded an NWO Medium Grant to build this processing giant, which will have the power of a supercomputer but requires only one percent of…

How can we broaden youth participation in STEM Learning

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.

Collaborators and advisors of the Plant BioDynamics Laboratory

What are ‘missing links’ in research on teacher professional development trajectories? We focus on the role and development of teacher facilitators in designing and implementing (collaborative) professional development trajectories.

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

Xinrong Ma defended her thesis on 13 February 2018

Promotores: S.F. Portegies Zwart, E. M. Rossi

Promotor: Prof.dr. S.F. Portegies Zwart, Co-promotor: D.C. Heggie

Supervisor: S.F. Portegies Zwart Co-Supervisor: A.G.A. Brown

Promotor: Prof.dr. S. Portegies Zwart

Mapping sanitary infrastructure in large urban societies in the Low Countries, 1200–1900

Practicum Artium (PA) is a programme specially developed for students of Leiden University with a talent for visual arts and an interest in artistic research. Art and research feed on one another and are intertwined in many ways. In Practicum Artium, you will explore artistic practices and methods,…

This research cluster is a part of the Institute of Political Science’s research programme ‘Institutions, Decisions and Collective Behaviour’. Its members study phenomena such as migration, immigration, citizenship, integration, ethnic parties, minority and caste-based politics, borders and migration,…

An international collaboration of astronomers is organising a special online lecture series for physicists and astronomers in Cuba. The reason for this is the tightening of measures against this country, as a result of which researchers can hardly get any information from outside the island. ‘Everyone…

The renovation of the Herta Mohr building (formerly known as Cluster Zuid) is completed. It is the third project in the redevelopment of the Humanities Campus. With the renewal of these buildings, the university ensures a sustainable campus with modern facilities. The university wants to create an attractive…

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…

Leiden astronomers published two articles on more sustainable astronomy in a special section of the journal Nature Astronomy. Among other things, they calculate that their online conference EAS 2020 consumed three thousand times less carbon dioxide than the face-to-face edition a year earlier. They…

How do secondary school teachers’ professional learning preferences relate to teaching experience and the school context?

These are the proposed research projects for LEAPS 2019. Please note that not all projects will go ahead and some may still be added in the near future. Final funding decisions lie with the Faculty sponsors. And please make a note that if you are interested in an ESA project, to check if your state…

Muslims have lived in Eastern and South-Eastern Europe for centuries. Their arrival in Western Europe, the two Americas and Australia is however relatively recent. Studying how Muslims relate to their Western environment (and vice versa) and the mutual influences of Western and Islamic philosophies…

The objective of this project is to understand the content and structure of science teachers’ knowledge and beliefs, and how these change in the context of pre-service teacher education and educational innovation.

To what extent do beginning teachers use, create and claim agency at their school?

The objective of this project is to show how teacher research can encourage teachers’ learning process as professionals, improve teaching practices and generate knowledge about these practices.

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.

Professor Simon Portegies Zwart and doctor Jeroen Bédorf had the honour to write for the IEEE Software magazine.

How can we make Sinterklaas inclusive as a national holiday? And what does this mean for our University community and Dutch society as a whole? These questions were the focus of the first edition of ‘Come Talk to Us’, a series of online dialogues organised by the Diversity & Inclusion Expertise Office…

Three Leiden astronomers have shown that some asteroids that are considered harmless for now, can collide with Earth in the future. They did their research with the help of an artificial neural network. The results have been accepted for publication in the journal Astronomy & Astrophysics.

A Dutch collaboration, including the SURF Open Innovation Lab and Leiden Observatory, has won Hyperion Research's HPC Innovation Excellence Award. This is the first time that a Dutch team has won the award. The team received the award for improving large-scale numerical simulations with deep learnin…

A team of Leiden astronomers has managed to calculate the first 100 million years of the history of the Oort cloud in its entirety. Until now, only parts of the history had been studied separately. The cloud, with roughly 100 billion comet-like objects, forms an enormous shell at the edge of our solar…

Constant Hijzen, assistant professor at the Institute of Security and Global Affairs (ISGA), spoke about the Law on intelligence and security services in the NRC. In the column ‘Twistgesprek’ (dispute) of the NRC Hijzen has a written conversation with the director of Bits for Freedom, Hans de Zwart,…

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…

What was the function of the Dutch Protestant Church in Sri Lankan society? Why did people relate to the Church and how did conversion influence their life course?

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…

A team of Dutch scientists has built a supercomputer the size of four pizza boxes. The Little Green Machine II has the computing power of 10,000 PCs and will be used by researchers in oceanography, computer science, artificial intelligence, financial modeling and astronomy. The computer is based at…

If three or more objects move around each other, history cannot be reversed. That is the conclusion of an international team of researchers based on computer simulations of three black holes orbiting each other. The researchers, led by the Dutch astronomer Tjarda Boekholt, publish their findings in…

A team of Dutch and Scottish researchers led by Simon Portegies Zwart (Leiden University) has found an explanation for the chaotic behavior of the orbit of Halley's Comet. The findings are accepted for publication in the Monthly Notices of the Royal Astronomical Society.

Simon Portegies Zwart, professor of Computational Astrophysics, uses computers to simulate the evolution of stars. We speak with him about his field and about the challenges of working with huge amounts of complex data.

Mathematical and computational analysis of the dynamics of polar transport of the plant hormone auxin.

Governance is a complex puzzle of organisations, people and divergent interests. Academic research in this field furthers our knowledge of the role of public administrators, of different organisational structures, of the people who work at such organisations and of how these organisations implement…

Africa is fascinating! In today’s globalised world, the continent plays an increasingly important role in international social and cultural developments. Would you like to explore the many sides of Africa and its impact on the rest of the world, while also learning one of its languages? Our African…

From simulations of galaxies to analyses of MRI scans: scientific research needs more and more computing power. Leiden University is planning to set up a completely new facility for high-performance computing. The green light was given officially on 20 June.

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…

The freedom to be who you are – woman, man, homosexual, heterosexual, transgender, religious, atheist, and so on – is perhaps the Netherlands’ greatest attribute. The principle of equality and the right not to be discriminated against are in the very first article of our constitution. Yet there is a…