On 22 May, the Dutch House of Representatives invited one hundred citizens to pose critical questions regarding the Ministries’ annual reports. This followed on from the annual ‘Accountability Day’. Caspar van den Berg, Associate Professor of Public Administration, helped think about how citizens could…

Marloes van Noorloos is appointed Professor of Criminal Law and Criminal Procedure at Leiden University from 1 February 2025.

Despite being prohibited by law since 1971, race discrimination continues to exist in the Netherlands. Why is this?

Today is the general election in the Netherlands – although the polling stations have actually been open for two days already because of the coronavirus restrictions. Leiden researchers and students are involved in all manner of ways, and are analysing the campaigns and possible results.

Tech company Uber uses various tricks via the Netherlands to avoid paying tax on its profits. A $16 billion inter-company loan from Singapore has prompted questions with experts claiming the loan is not under arm’s length terms. MEP Paul Tang wants Brussels to investigate.

The government is investing 646 million euros and has set aside a further 3.5 billion to drive economic growth in the Netherlands. Much of the National Growth Fund will be used for scientific innovations. Leiden University is involved in three of the projects.

The RED team, a group of independent experts, has advised the Dutch government to close down all (secondary) schools. It is a difficult balance the government has to find between limiting the number of contagions and the social consequences of closing down the schools. As a result of the first lockdown…

In the controlled, censored, and taboo-ridden media landscape of communist China, one would not expect seeing a television show featuring real people having actual conflicts. Yet reality programmes about conflict mediation are mushrooming in the People’s Republic. Both the public and the authorities…

Seven bachelor students in Computer Science at Leiden University are participating in a research project on big data and event management. Their work should eventually result in a system that can be applied at the finish of the Volvo Ocean Race in The Hague in June next year.

Brain scans, heart attacks and credit scores: many science applications revolve around data. But how do you mine applicable insights from a mountain of data? In a Bachelor Honours Class, students discover how data science can contribute to their discipline.

Scientists of the faculty of Governance and Global Affairs research completely different subject, among which terrorism, cybercrime and migration. In the upcoming weeks we will give the floor to several of our very best researchers. In this episode: Constant Hijzen researches secret services.

Some children start life with a disadvantage. Sometimes even before they are born. A new research project involving Professor Wessel Kraaij of Leiden University investigates how data science can help give these children a good start in life.

Amid rising polarisation and discrimination, lawyer and human rights activist Lilian Gonçalves-Ho Kang You wants to show in her Cleveringa Lecture on 26 November how dangerous exclusion is.

Lawyer and human rights activist Lilian Gonçalves-Ho Kang You is the new Cleveringa professor.

Researchers from Leiden University, KU Leuven and Paris II compared the French legislative proposal with the Dutch Civil Code. They published their findings in the Revue internationale de droit comparé (RIDC). Some recommendations have been adopted by Jean-Jacques Urvoas, the Minister of Justice.

‘I already gave a talk about planets when I was five.’ With the theme of the 3 October celebrations being ‘Jong geleerd is oud gedaan’ (meaning something like, ‘You’re never too young to learn’), this year’s 3 October University was especially for children. Many parents came with their offspring to…

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.

Lecture

Members of our research team give different types of presentations and lectures.

How can we promote social cohesion in a society that is culturally and religiously diverse?

PhD defence

PhD defence

PhD defence

Due to its success, the Leiden2022 Q&A has been extended and is looking for even more thought-provoking, interesting or unusual questions.

For the first time, an international group of astronomers have seen the heat glow of two ice giant planets colliding. They could also observe the resultant dust cloud move in front of the parent star several years later. Led by Leiden astronomer Matthew Kenworthy, they monitored the star's brightness…

Indonesia still has a long way to go before the country can truly flourish, was the message given by Indonesian Vice President Boediono during his visit to Leiden University on 26 March. He viewed collections in the University Library and the Hortus, and was presented with the William of Orange medal…

Three Dutch-Belgian telescopes have started operating at the ESO La Silla Observatory in Chile. This so-called BlackGEM array will scan the southern sky to hunt for cosmic events that produce gravitational waves, such as mergers of neutron stars and black holes. Leiden astronomer Rudolf le Poole is…

Universities cannot survive in this highly competitive world without collaboration. And the ultimate aim is to make the world a safer and more sustainable place. This was Rector Carel Stolker’s message during the 441st Dies Natalis.

Engineering, law, and business students came together in the LDE Space & Society Honours Programme to explore how space and society can mutually benefit each other. At the final event, they looked back upon a steep learning curve. ‘We tossed them into the water and they had to swim.’

How do molecules originate and evolve in space? And how does that ultimately determine the chemical composition of planets and their atmospheres? The Dutch Astrochemistry Network (DANIII) receives 1.6 million euros from NWO to find out. A large group of Leiden astronomers and chemists is contributing:…

Our motto is Praesidium Libertatis, or ‘bastion of liberty’. How did it come into existence, and in what way is Leiden University staying true to its meaning? Five questions about our motto.

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…

Leiden University celebrated the Relief of Leiden with the 3 October University. This year the University also took part in the festive parade, to promote 444.

‘In Hong Kong, the elderly found our popular nature routes boring, so they now cycle our action-packed routes through New York.’ What once started as an assignment for the Master Programme Media Technology, has grown into the international market leader in the field of virtual reality exercises for…

As a student, Ratna Lachmansingh wrote her thesis on horror films. Now she is the director of Leiden International Film Festival.

With the new Euclid satellite, scientists are going to map a large part of the sky. The satellite ofthe European Space Agency (ESA) will soon give them a better view of the galaxies and matter in the universe. Professor of Galactic Astronomy Koen Kuijken and a team of Dutch scientists are receiving…

After months of preparation, the moment of truth had arrived: would the skies above Leiden clear for the promised glitzy planet-and-star show? The people of Leiden turned out in their hundreds to go star-hunting on 25 September. They became more aware than ever of the effects of light pollution.

The European Space Agency (ESA) has published an interim data release from Gaia, the space telescope mapping out the Milky Way in 3D. The first scientific papers published today reveal half a million stars in the Omega Centauri globular cluster, nearly 400 candidate gravitational lensers and the positions…

The two instruments of ESA's space telescope Euclid have taken their first test images. The first images indicate that the space telescope will achieve the scientific goals for which it was designed - and possibly much more. Euclid will create a 3D map of a third of the sky, allowing scientists to study…

'Find your way from the stars’, an online workshop on Nautical Astronomy, was one of the winners of The Netherlands Online Cultural Challenge 2020. The workshop was conducted in collaboration with the IAU Office for Astronomy Outreach, Leiden University’s Astronomy & Society Group, and the Department…

‘It's empty talk, nothing but political posturing,’ says Prof. Leo Lucassen about Minister Lodewijk Asscher's plan for a participation contract for migrants. ‘It will never happen.’ Lucassen, Leiden specialist in History of Migration, discussed Asscher’s Integration Letter on the NTR programme De Halve…

A microscope with incredible sharpness that leaves samples unharmed – Guido Stam helped develop one. During his PhD research, he combined light and electrons to study biological samples. ‘We can now measure things that simply weren’t possible before.’

By a stroke of luck, a team led by Dutch PhD student Martijn Oei has discovered a radio galaxy of at least 16 million lightyears long. The pair of plasma plumes is the largest structure made by a galaxy known thus far. The finding disproves some long-kept hypotheses about the growth of radio galaxie…

With the red flag flying proudly on the Academy Building (Leiden University was on strike for the first time in its history!), the farewell event for former dean Mark Rutgers was held in the Telders Auditorium. After eight years, he has passed the baton to the interim dean, Henk te Velde.

Astronomers have used data from the European Gaia Space Telescope to discover 55 high-speed stars launched from the young star cluster R136 in the Large Magellanic Cloud, a satellite galaxy of the Milky Way. This increases tenfold the number of known “runaway stars” in this region. The team of astronomers,…

Using the Dutch-led Low Frequency Array (LOFAR) radio telescope, astronomers have discovered unusual radio waves coming from the nearby red dwarf star GJ1151. The radio waves bear the tell-tale signature of aurorae caused by an interaction between a star and its planet. The radio emission from a star-planet…

The Night of Discoveries will take place on 20 September in the area around Hortus botanicus Leiden, the Old Observatory, Pieterkserk, the Academy Building, Old School, the Faculty Club and the PJ Veth Building.