Sweetie 2.0 is a research project commissioned by Terre des Hommes on online child sex tourism and criminal law.

Netherlands Statistics (CBS), Leiden University and the University of Amsterdam have started a collaboration in the form of a research project titled 'Enriching official economic statistics using data-driven modelling techniques'.

What if I completely changed everything? A subject without lectures or exams, where the right answer is not important and where students work with their hands. With this idea, Michiel Brentjens reformed the course Radioastronomy. His students are so enthusiastic about this approach that they nominated…

The project’s overall goal is to improve Indonesia’s environmental legal framework and its implementation by strengthening the regulatory capacity of the government, and by enhancing the capacity of CSOs and scholars to hold the government accountable for its regulatory performance.

Radio telescope LOFAR maps the sky. It produces incredibly detailed images of the universe - and vast amounts of data. Huub Röttgering, director of the Leiden Observatory, talks about the challenges of working with those enormous datasets.

An international team of astronomers including Leiden scientists publishes the image of a young star with a surrounding dust disk that is still being fed from its surroundings. The phenomenon around the star SU Aur may explain why so many exoplanets are not neatly aligned with their star. The European…

In this overview of the reception of Duchamp, the plurality of possible approaches is examined.

On 24 January 2024, Vethaak defended the thesis 'Empirical Analysis of Social Insurance, Work Incentives and Employment Outcomes'. The doctoral research was supervised by Koen Caminada and Pierre Koning.

Lecture, Kaiser Spring Lecture

Early July was the graduation ceremony of the Leiden Leadership Programme,: a moment to reflect and celebrate the outcomes of eight months’ hard work. Leiden’s Marekerk was filled with colourful music and some wise pieces of advice: ‘Find the path that suits you best.’

This study investigates how the tenure of security (proxied by both inter- and intra-party electoral advantage) affects the engagement and political performance of members of parliament.

Nobody is better qualified to tell you what it is like to work at Leiden University than the employees themselves. Watch the videos and meet your future colleagues. They will be happy to share their experiences with you.

Imagine how much time, money and discomfort it would save: a personalised treatment for each individual patient. Precision medicine like this is coming ever closer, thanks in part to Elise Dusseldorp’s algorithms. They retrieve a wealth of information from research data.

Family, Work, and Household presents the social and occupational life of a late medieval Iberian town in rich, unprecedented detail. The book combines a diachronic study of two regionally prominent families—one knightly and one mercantile—with a detailed cross-sectional urban study of household and…

This thesis is comprised of three chapters covering the theme of studying semistable varieties by looking at their dual combinatorial objects.

A post-colonial approach to the concept of time in the past and present Maya culture

A signal that is present both in the centre of our Milky Way and in distant places in the universe could reveal the origin of dark matter. This is what Leiden physicist Alexey Boyarsky concludes in an article in Physical Review Letters.

In this top-rated course, you will learn how the European Union prepares and decides on policy, and how policy is transferred to member states and implemented by various authorities. It discusses the challenges of the European multi-level governance structure and the main causes of policy failure or…

Lecture, Kaiser Lente Lezing

The European Space Agency (ESA) introduces the members of the European Center for Space Law (ECSL) on its website through interviews with its members. One of those members is Tanja Masson-Zwaan.

Together with physiotherapist and lifestyle therapist Jaap Wonders of SMC Rijnland, Helen Pluut conducted research during the first COVID-19 wave on the experiences of working people. The reason for the research was the compulsory situation of working from home many people found themselves in. One of…

This dissertation is a study of North Korean art as a site where politics, history, and culture meet.

Many handwritten and illustrated archives contain a wealth of information, but are largely underexplored because they are complex and difficult for computers to decipher. The aim of this project is to develop a digital environment that resolves this challenge and connects heterogeneous archival content…

A source of inspiration for readers who are curious to understand how people move and convince each other

Researchers at Leiden Observatory study the fundamental physics that creates structure in the Universe. These processes collect matter into galaxies and gas into stars. With the use of powerful telescopes and advanced calculations and computer simulations, Leiden astronomers seek to understand the origin,…

Researchers at Leiden Observatory study the fundamental physics that creates structure in the Universe. These processes collect matter into galaxies and gas into stars. With the use of powerful telescopes and advanced calculations and computer simulations, Leiden astronomers seek to understand the origin,…

In 2015, Jorryt Matthee thought he discovered an extremely distant galaxy called CR7, which lacked elements heavier than helium. Three years later, he shows with measurements using the ALMA telescope that the galaxy does have carbon after all, and even in normal concentrations. The American Astronomical…

Over the past few months, Urban Studies students have been helping to think about the realisation of the Humanities Campus. To test their knowledge in practice, the future urban specialists gave advice on several different aspects, including thermal energy storage and the new central campus building…

Tanja heeft zich sedert 1985 met haar bijzondere en veelzijdige talenten ingezet voor het opbouwen van het internationaal Instituut voor Lucht- en Ruimterecht, waarvan zij vanaf de oprichting codirecteur is.

To recruit, enthuse and give talent from home and abroad room to grow, Leiden University has developed good HR policies for researchers.

The moon exerts a pull on us. The Americans won the space race and were first to land there. In the Universiteit van Nederland, space law expert Tanja Masson explores the questions that this raises. Who owns the moon and the valuable resources that are found there?

Promotores: F.H. van Lunteren, F.P. Israel

The focus of this thesis is how stars like our Sun and planets like Jupiter, Saturn, and Earth are formed.

This thesis explores the theoretical and observational properties of distant massive galaxies that harbour active black holes in their centres and shine brightly at radio wavelengths.

On the largest scale, the Universe resembles a cosmic spiderweb. Most galaxies coexist in small groups within the threads of this web. At the nodes of the threads are enormous groups of galaxies forming the largest structures in the universe still held together by gravity: clusters of galaxies.

My work is motivated by the necessity to extend Standard Model of Particle Physics in order to explain three observed phenomena that this great theory fails to accommodate

Low-mass main-sequence stars like our Sun are continuous sources of outflowing hot magnetised plasma. In the case of the Sun, this is known as the solar wind, whereas for other stars they are called stellar winds.

The Jeugdwerkgroep is a national astronomy association for young people who are interested in astronomy. The Leiden section organizes a monthly meeting in the Old Observatory Leiden.

In this thesis, I study the formation of large-scale structure and the physics of particle acceleration at large scales (~Mpc).

Understanding the formation and evolution of planetary systems is one of the most fundamental challenges in astronomy. To directly image and study young exoplanets and the circumstellar disks they form from, dedicated high-contrast imaging instruments are built.

In this thesis new methodologies are developed for the detection and systematic study of radio sources in the early universe. This allows us to gain a deeper understanding of the formation and evolution of galaxies, the activity of supermassive black holes, and the final phase transition of our universe:…

Planets are formed in disks of gas and dust around young stars.

This thesis focus on the interaction between M dwarf stellar winds and Galactic cosmic rays and the possible effects on the habitability of exoplanets.

The Leidse Weer en Sterrenkunde Kring (LWSK) is a society of amateurs interested in astronomy, space travel and meteorology. The association organises a monthly lecture on a fascinating subject, given by an expert in the field.

Promotor: Christoph U. Keller, Co-promotores: Matthew A. Kenworthy, Frans Snik

In 2022, Leiden will be the European City of Science. University lecturer Jaap de Jong has created special assignments for the journalism master's students to celebrate this: they will go into the city to visualise knowledge from the city.

We are delighted that our annual "Science to Experience" exhibition will again take place, hosted by the V2_ Lab for the Unstable Media. Students were challenged to communicate their own science-inspired statements as experiences within the exhibition, this year along the theme "MUTATE".

Bernard Bernards examines constraints on innovation by focusing on cognitive uncertainty as a personal state that may affect innovative work behavior.

This project focuses on vocational teachers’ professional development in work placement. Teachers’ learning motivation, learning experience and learning outcomes within work placement will be explored in depth.