For centuries astronomers studied the Universe by collecting light. Nowadays, we are living in times of great technological advancements, which allow us to explore our Universe in a new way - though gravitational wave radiation.

Leiden houses the oldest university in the Netherlands, 13 museums, and 23 kilometres of canals with 88 bridges.

There are several ways to support Leiden University financially.

Underneath you will find more information on how the university works.

New results from the Kilo-Degree Survey (KiDS) show that the Universe is almost 10 percent more homogeneous than previously thought. The new KiDS map was created using the partly Dutch OmegaCAM on ESO's VLT Survey Telescope on Cerro Paranal in Northern Chile. An international team of astronomers from,…

Can we speak of a single Islamic discourse in fields like politics, militancy, economics, sustainable development, and the like, and what interaction does this Islamic though have with ‘Western’ thought?

Many members of the Royal Family have studied at Leiden University and several have been awarded an honorary doctorate.

In Germany, the United States and even in Vietnam: all over the world, the Leiden discovery of the birth of two planets was shared. Astronomer Sebastiaan Haffert and his team were able to record multiple planets in the making for the first time and published their findings in Nature Astronomy. A unique…

We are glad to present our new research report on Exploring the Frontiers of International Law (EFIL). International Law has traditionally been one of the flagship areas of the Leiden Law School. The report provides a taste of our rich research agenda in international law.

Promotor: Prof.dr. C.U. Keller, Co-promotor: Dr. ir. Frans Snik

Our university community is the heart of our academy. It is very important for Leiden University that our staff and studentsenjoy coming here to work and study and are able to carry out their activities without any hindrance.

Dark matter represents around eighty per cent of the total mass in the Universe. Yet, we still don't really know what it's made of. Astronomer Pavel Mancera Piña is looking for answers. With a Veni grant from NWO and the most advanced telescopes, such as the James Webb Space Telescope, he will investigate…

The ultimate goal of cosmologists is to find a cosmological model able to explain the current observational data.

With 8.9 million euros from the Danish National Research Foundation, Aarhus University and Leiden Observatory will establish the Center for Interstellar Catalysis. The centre is led by Aarhus professor Liv Hornekær and aims to find out how and when the building blocks of life formed in the Universe.…

A team of European astronomers under Leiden leadership has discovered that dust particles around a star already coagulate before the star is fully grown. These agglomerated dust particles are the first step in the formation of planets. The research publish their discovery in the journal of Nature As…

This dissertation consists of two parts, with the common theme

How can you see something that’s invisible? Well, with Euclid! This future ESA telescope will map the structure of the Universe and teach us more about invisible dark matter and dark energy. Scientific coordinator of Euclid and Leiden astronomer Henk Hoekstra explains how this works.

How big is the universe? How do stars form and evolve? And does life exist elsewhere in the Universe? These main questions in astronomy are the themes of the new exhibition Above & Beyond, which was created in honour of the hundredth anniversary of the International Astronomical Union (IAU). The exhibition…

Is our universe built up out of warm or cold dark matter? The standard model assumes cold dark matter particles, but astronomer Sylvia Ploeckinger is now testing the possibility of a warm counterpart: sterile neutrino’s. For this project, she received an NWO Physics/F grant, a special grant for women…

On Friday 24 March, Prof. Amanda Perry-Kessaris (Kent Law School) will deliver the monthly Leiden Socio-Legal Lecture.

One unravels the origin of the largest black holes in the universe, the other investigates the influence of stellar wind on the atmosphere of exoplanets. Both Elena Maria Rossi and Aline Vidotto receive a Vici grant for their research into the mysteries of the universe. ‘I have no idea yet how we can…

There are various links between Rembrandt and Leiden University

Have you found a few programmes that interest you? Take the time to find out all there is to know about them.

The goal was to work towards the implementation of of one weekday where all the PURE restaurants serve solely vegetarian meals.

The goal was to work towards the implementation of of one weekday where all the PURE restaurants serve solely vegetarian meals.

NASA’s telescope SOFIA has provided a new glimpse of the chemistry in the inner region surrounding massive young stars where future planets could begin to form. Leiden PhD candidate Andrew Barr writes about it in the Astrophysical Journal. The scientists found massive quantities of water and organic…

Considering the ways in which the ‘global turn’ is changing the theory and practice of historical disciplines, Explorations in History and Globalization engages with the concept and methodology of globalization, challenging traditional divisions of space and time to offer a range of perspectives on…

In this thesis, we examine various systems through the lens of several numerical methods.

Our information activities can help you make the right study choice. Throughout the year you can get to know Leiden University, our bachelor's programmes and student life in Leiden and The Hague in various ways.

In the depots of the Faculty of Archaeology, many artifacts, accumulated after decades of fieldwork across the world, are stored. A new project, the Leiden Inventory Depot (LID), aims to unlock this wealth of information to the outside world. Our Master’s students Sam Botan and Rishika Dhumal are currently…

An international team led by Leiden astronomers has taken the first-ever image of a young, Sun-like star accompanied by two giant exoplanets. The researchers used The European Southern Observatory’s Very Large Telescope for this, known as ESO’s VLT. Images of systems with multiple exoplanets are extremely…

An international team led by Leiden astronomers has, after years of searching and defying the boundaries of a telescope, for the first time directly captured polarised light from an exoplanet. From this light they can deduct that a disk of dust and gas orbits the exoplanet. In this disk moons are possibly…

A team of Leiden astronomers used the latest set of data from ESA’s Gaia mission to look for high-velocity stars being kicked out of the Milky Way, but were surprised to find stars instead sprinting inwards – perhaps from another galaxy.

Gianclaudio Malgieri, associate professor of Law & Technology and board member at eLaw - Center for Law and Digital Technologies, met with Swedish and Dutch inspiring academics on 13 November at the Europe House in the Hague, to have an “unrehearsed, spontaneous and eye-opening conversation” on current…

Rottgering

This thesis mainly focuses on multimodal understanding and Visual Question Answering (VQA) via deep learning methods. For technical contributions, this thesis first focuses on improving multimodal fusion schemes via multi-stage vision-language interactions.

On January 29th, the first annual event of the SUPER MoRRI project will be held in the Lipsius building in Leiden and will be thematically organized around engaging the public with research and innovation. Registration is free; hope to see you there!

Promotores: Prof.dr. J. Schaye, Prof.dr. S.D.M. White (MPA Garching)

This volume is the outcome of collaborative European research among archaeologists, archaeobotanists, ethnographers, historians and agronomists, and frequently used experiments in archaeology.

This thesis mainly focuses on cross-modal retrieval and single-modal image retrieval via deep learning methods, i.e. by using deep convolutional neural networks.

Telling sensationalised stories, exaggerating benefits and understating the risks: creating ‘hype’ about something doesn't sound like something a responsible scientist would indulge in. Or could we also use hype in a ‘good way'? What could we achieve by opening up quantum futures for wider discussions,…

Simulations of galaxies help researchers understand astronomical observations better. The EAGLE simulation, a large project in which Leiden astronomers play a leading role, shows the evolution of the Universe, from just after the Big Bang to the present day.

In this thesis, several aspects of software debugging from automated crash reproduction to bug report analysis and use of contracts have been studied.

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…

In what way is constructivist logic able to account for both the role of the judging agent in inference and the universal claims of logical validity?

How do ideas concerning the academic study of religion relate to the socio-cultural and political context in which they are developed?

To increase clinical success rate of drugs, a better understanding of drug action mechanism and disease dynamics is required. Metabolomics, which studies small molecules involved in biochemical processes in organisms, has shown to be a useful tool for this better understanding.

Bright explosions appear all over the radio and gravitational-wave sky. This dynamic side of the universe which has just been discovered, can be mapped by self-learning machines. The National Science Agenda granted 5 million euro’s to CORTEX, the Center for Optimal, Real-Time Machine Studies of the…