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…

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After the Second World War almost three million people emigrated from the Netherlands to countries such as Canada and Australia. The government information was anything but objective, Professor by Special Appointment of Dutch Studies/Dutch Literature Ton van Kalmthout concludes in his inaugural lect…

After graduating from Leiden University College The Hague, our students spread out all over the world to continue their studies, do an internship or already start a job. Every other week we will catch up with one of our alumni and put them in the spotlight. They will share their LUC experience and talk…

All the planets in our solar system orbit around the Sun in an ecliptical plane. This is to be expected because our solar system was formed from a so-called protoplanetary disc. PhD candidate Anna Miotello has studied these kinds of discs and how they influence the formation of stars and planets. PhD…

'If a local dares to speak to you, do interact, but mind what you say.' This was the advice given to Stephanie van den Akker, second-year student of International Studies, during her visit to North Korea. And yes, one local did actually speak to her, leaving her completely speechless.

Within the space of a few months, the Heritage Quest citizen science project, whereby volunteers scan elevation maps of the Veluwe area for burial mounds and other prehistoric remains, has already led to groundbreaking new insights. Hundreds of burial mounds have been found, as have a huge number of…

The present market regulations make it extremely risky to invest in green energy, and this is impeding the fight against climate change. This is what Oscar Kraan writes in his dissertation. PhD defence on 25 April.

Always wanted to find out what zero gravity is like? Now's your chance! In December 2017 a Dutch student team will be conducting experiments during a parabolic flight, and they're looking for healthy volunteers. You do have to meet a number of strict conditions, says the team leader.

Dwarf satellite galaxies in the Milky Way perform different dances than researchers initially expected. Marius Cautun from Durham University received a Marie Curie grant to unravel the mysteries of this orbital dance. October 1st 2018 he will start his research at the Leiden Observatory.

How is it that the internet works so well, with billions of users sending millions of gigabytes all together every day? That's because the foundation of the internet is solidly set up. Yet sometimes there are problems on the internet. For example, when certain systems misbehave and disrupt the routing…

He discovered how to determine the rotation and centre of our Milky Way, predicted where comets come from and laid the groundwork for radio astronomy: Leiden Professor of Astronomy Jan Hendrik Oort (1900 – 1992). Piet van der Kruit, whose PhD supervisor was Oort himself, has written a biography about…

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It doesn’t take long before Tim van Lit has told us what interests him: problems that shake the nation. This 28-year-old Criminology alumnus heads a team of 25 at Royal Netherlands Marechaussee. Location: Schiphol Airport.

Festival

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…

Theoretical physicist Stephen Hawking (76) passed away on 14 March at his home in Cambridge, having been a long-term sufferer of the muscular disease ALS. A number of Leiden scientists look back at the life and scientific career of this world-famous physicist. 'He was very approachable and extremely…

Using the MUSE instrument on ESO’s Very Large Telescope in Chile, an international team of scientists, including many Leiden astronomers, have conducted the deepest spectroscopic survey ever. They focused on the Hubble Ultra Deep Field, measuring distances and properties of 1600 very faint galaxies…

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…

Galaxies are often found in clusters, which contain many “red and dead” members that stopped forming stars in the distant past. Now, an international team of astronomers, led by Andra Stroe of Leiden Observatory and David Sobral of Leiden and the University of Lisbon, has discovered that these comatose…

A large delegation composed of 11 delegates from institutes from the Faculty of Science has made an extensive visit to China and enhanced Leiden’s influence in the Chinese academia, industry and local government.

A Leiden University Day, new agreements on exchanging PhD students and a keynote speech by Geert de Snoo at a popular symposium. In November, a Faculty of Science delegation paid a fruitful visit to eight universities in China.

The directorate of the Netherlands Research School for Astronomy (NOVA) has two new members. Ronald Stark (currently at NWO) will be the new Executive Director of NOVA from 1 September. Amina Helmi (Professor of Dynamics, structure and formation of the Milky Way at the University of Groningen) will…

Study Information

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The opening of Islamic primary schools has made an important contribution to the emancipation and integration of Muslims in the Netherlands. This is the conclusion of PhD candidate Bahaeddin Budak in his research into 25 years (1988-2013) of Islamic primary schools in the Netherlands. PhD defence on…

Associate Professor Asghar Seyed Gohrab considers it his role to tell students about Iran, the country where he was born and raised. His research focuses on the connections between the present and the past on the basis of the ‘magical triangle’: Persian literature, politics and religion.

In his guest lecture on 22 January André Kuipers took school pupils and students on trip through space. His mission was to interest his young listeners in science and technology.

In the past decades terrorists have regularly surprised us with unexpected and spectacular attacks, such as the one on the World Trade Centre in New York. How can intelligence services stay one step ahead of them? Consult Charles Darwin and Steven Spielberg is the advice of terrorism expert Yannick…

At the end of March, the first coronavirus infections were detected in southern Africa, which resulted in country after country rapidly closing their borders. Tycho van der Hoog witnessed this process at first hand during his PhD research in Namibia. He analyzes the state of the corona crisis from his…

International Archaeology student Grace Alonzo went back to her home country when the coronavirus situation developed. Now she is living at her parents place in the US, following Leiden lectures remotely, while juggling a tight schedule with a job, and the effect of time difference. ‘I have all my exams…

While offshore wind farms generate clean and green energy, scientists are becoming increasingly aware of the harmful impact they may have on marine life. To get a better overview of these impacts and to find the best locations for future wind farms, environmental scientist Yali Si and her colleagues…

Can astronomers mitigate climate change? This is what Leiden astronomer Leonard Burtscher and his colleagues discussed at the annual meeting of the European Astronomical Society. For the second year in a row, the meeting was online. And according to Burtscher, it should stay that way. During a special…

Imagine: you are at the end of your fieldwork in Peru and ready to go home when all flights get canceled because of Covid-19. It happened to master student Visual Ethnography Mark Lindenberg. By now, four months later than scheduled, he is back in the Netherlands. How does he look back? And what was…

When stars are born, large clouds of gas and dust form that are known as circumstellar discs. Research by PhD candidate Francisca Concha-Ramírez shows that strong radiation from neighbouring stars soon evaporates the dust in these discs, which can prevent planet formation at an early stage. PhD defence…

In the upcoming months, PhD candidates Neske Baerwaldt (FdR / VVI) and Wiebe Ruijtenberg (FSW / CAOS) will produce the ethnographic podcast series ‘Grensverhalen’. The series will be published online in September, and will be used as teaching material in various courses.

Counterterrorism specialists often have to contend with difficult ethical dilemmas. There is currently a lack of any adequate infrastructure within intelligence agencies for discussing these dilemmas, Michael Kowalski writes in his dissertation. PhD defence on 12 March.

As a psychologist and pilot, Bert Busscher is interested in the phenomenon often termed as fear of flying. Busscher discovered that the heart rate of a person undergoing a therapeutic flight shows how much they still suffer from fear of flying. The post-flight heart rate can even predict whether the…

China is an important partner of Leiden University. We collaborate with more than 20 Chinese universities and welcome around 400 Chinese Bachelor’s, Master’s and PhD students.

The rise of populist parties, the expansion of the role of the state and now the fragmentation of the Senate and the House of Representatives: Dutch political reality has changed rapidly over recent decades. These developments are in stark contrast to Dutch constitutional law that has remained almost…

Assyriologists in Leiden have been conducting research into ancient clay tablets from the Middle East for 100 years already. What exactly do these clay tablets tell us? And why is Leiden such a good place to study them?

Today, ESA’s Gaia mission releases its new treasure trove of data about our home galaxy. Astronomers, led by the Leiden astronomer Anthony Brown, describe strange ‘starquakes’, stellar DNA, asymmetric motions and other fascinating insights in this most detailed Milky Way survey to date.

A special type of mirror to reflect X-rays has more possible applications than space research. Targeted radiation therapy for cancer, for example. Next to his full-time job, physicist David Girou mapped out the possibilities. He will receive his PhD on 14 June.

Lecture

Lecture, LUCL Colloquium - Fall 2017

Lecture