A time-lapse of the universe in more detail than ever before: that’s the aim of the NSF–DOE Vera C. Rubin Observatory in Chile, which will unveil its first images of the night sky on 23 June. Researchers at Leiden Observatory have played a major role in making it all possible.

Astronomers have captured a new deep field of Pandora's Cluster (Abell 2744) with the James Webb Space Telescope. The images show never-before-seen details. The results are described in four scientific papers. Leiden astronomers Marijn Franx and Mariska Kriek collaborated on the study. 'This opens a…

With a call for dialogue and collaboration, vice dean Bart de Smit kicked off the new academic year for the Faculty of Science on Tuesday 3 September. Theoretical physicist Carlo Beenakker outlined the possibilities of quantum as a disruptive technology.

With new algorithms and supercomputers, an incredibly detailed radio map of the universe was created. Now astronomers can look at radio data of galaxies with much more precision. This was published in Nature Astronomy by Leiden PhD student Frits Sweijen and colleagues.

The European Research Council has awarded a Starting Grant to five early career scientists from Leiden University. They received funding up to 1.5 million euros to further expand on their research subject.

Alumnus Rennie Roos lives and works in Indonesia. What took him there, what does he do there and what inspires him?

Between 6 and 9 June, you’ll be able to vote in the European elections. But what can you expect from these elections? What are the most important topics on the European agenda? And why should you even vote? Students from the European Law master’s specialisation explain.

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…

Loss of cultural heritage first brings to mind the destruction in the Middle East. But in the Caribbean it is mainly natural processes such as coastal erosion and human interventions driven by economics that are damaging the local natural and cultural heritage. A conference is taking place on Bonaire…

On 10 Friday, 'Warm Sweater Day', the central heating in University buildings was set a few degrees lower. Those who are not so warm-blooded could take comfort knowing that there are students who are deliberately keeping the heating turned down the whole winter.

The International Resource Panel of the United Nations Environment Programme, with CML researcher Ester van der Voet as member, has prepared a report called Global Resources Outlook 2019: Natural Resources for the Future We Want. It examines the trends in natural resources and their corresponding consumption…

Cutting down global emissions of greenhouse gases to combat global warming won’t do the trick alone: we also need negative-emissions technology that can capture carbon dioxide directly out of the air. In the prestigious journal Global Environmental Change, PhD candidate Oscar Rueda and colleagues shed…

In September 2023 the new minor Sustainability, Climate Change and Food starts. This minor critically examines the complexities of food sustainability through ecological, socio-economic, political, and cultural systems.

Starting with the ‘why’, putting herself in her students’ shoes and providing structure. These are three ways in which environmental scientist Ranran Wang tries to make her course as interesting and manageable as possible. With success: she has been nominated for Science Teacher of the Year 2022.

To support policies and decision-making on sustainability, it is important to involve citizens and stakeholders in the process. The term used for this in Public Administration is 'participation'. Professor Eefje Cuppen observes that things still often go wrong with participation. Inaugural lecture on…

An international team of researchers observed the full extent of the evolution of hot gas produced by an active black hole for the first time. As it evolves, the hot gas encompasses a much larger area than previously thought and even impacts objects residing at great distances. Their study is published…

At the Faculty's opening of the 2019-2020 academic year, the focus lay not just on the vision for the future of the social sciences, and the opening of the refurbished library, but above all on the government's plans for university financing. The speeches included an interview between Annemarie Samuels…

During the Faculty of Science New Year's reception, Daniël Rozen was named Discoverer of the year 2015. Nienke van der Marel and Koen van der Maaden both won the prize for the best dissertation and Jeroen van Smeden was named Best Teacher of 2015.

Astronomers from Leiden Observatory have developed a new method to find distant quasars and better distinguish them from other objects that look like them, using machine learning techniques. The research result has been accepted for publication in the journal Astronomy & Astrophysics. It is the last…

Your own food truck, working from the comforts of a tropical beach in Bali, or a permanent job? Children, living together, getting married, a registered partnership? Thirty-somethings have a lot to think about. On Monday 16 April, Psychologist Nienke Wijnants gave a popular lecture to 120 young alumni…

Rychard Bouwens from the Leiden Observatory is the first scientist in the Netherlands to be assigned a Large Programme on the state-of-the-art ALMA telescope in Chile. With his team, he wants to use the unique capabilities of the billion-euro facility to investigate the build-up of massive galaxies…

SRON Netherlands Institute for Space Research is moving. The headquarters of the institute will relocate to the Science Campus of Leiden University. In October 2019, the first pile was officially put into the ground; in 2021, the building will be ready for use. A first glimpse at the building that will…

CML grants three Stans Awards each year, known as the best PhD paper, best student thesis and best outreach from the past year. The CML staff nominated students and colleagues and this year’s jury Helias Udo De Haes and Gjalt Huppes made the final decision.

Leiden astronomers and ecologists are developing an instrument that lets people measure the quality of surface water with a smartphone.This international citizen science project, MONOCLE, is a collaboration between scientists and local people in Tanzania, Brazil and four European countries.

How are supermassive black holes born? That is the question astronomer Elena Maria Rossi is trying to answer. But how do you investigate something you cannot see?

From the discovery of exoplanets to the hunt for extraterrestrial life. At the Astronomy Gala on 17 December in the concert hall in Leiden, astronomers looked back, but above all ahead. With King Willem-Alexander as guest of honour.

Deep observations made with the MUSE spectrograph on ESO’s Very Large Telescope have uncovered vast cosmic reservoirs of atomic hydrogen surrounding distant galaxies. The exquisite sensitivity of MUSE allowed for direct observations of dim clouds of hydrogen glowing with Lyman-alpha emission in the…

Astronomer Ignas Snellen studies exoplanets using telescope observations. But how is that possible when all the big telescopes are more or less at a standstill? Luckily, he has contact from home with a robot telescope in Mexico and his WIFI is finally working well.

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.

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…

Lydie Cabane, Assistant Professor in Governance of Crises at the Institute for Security and Global Affairs, recently published the book The Government of Disasters. In this book Lydie explores how the South African state bureaucracy reacts to disasters.

A galaxy is already incredibly large, but it can get even bigger. Astronomer Reinout van Weeren investigates clusters of galaxies, one of the largest structures in the universe. For his research into the origins and evolution of these clusters, he obtained an ERC Starting Grant of 1.5 million euros.…

The students from the Leiden University Green Office have big ambitions and have outlined their recommendations in a new Green Paper. Like being the most sustainable university in the world by 2030. Students Janey Franssen and Job Kemperman are two of the paper’s authors. How do they want to achieve…

Dutch researchers are joining forces to conduct research together with a series of societal partners to keep the biological clock healthy in our modern 24-hour society. The BioClock consortium will receive a research grant of no less than 9.7 million euros for this. It is one of the projects that receive…

Astronomers from Leiden University have discovered that the star wind from a newborn star in the Orion Nebula prevents more stars from forming in the immediate vicinity. They made the discovery with data from the SOFIA observatory. This was announced by co-author Xander Tielens during a press conference…

The Sustainable City Lab The Hague will be a hub that connects organisations in The Hague that work on sustainability with the research and teaching at Leiden University. ‘We’re going to set to work on complex sustainability challenges in our own backyard,’ says project leader Eefje Cuppen.

Which young scientists are best at explaining their research in three minutes and can take part in the national finals? These questions were answered on 14 February in the Academy Building. Researchers Laura Steenbergen (cognitive neurosciences) and Christian Eistrup (astronomy) impressed the judges…

How can we supply the growing world population with sustainable energy? At Laurens College in Rotterdam, Prof. Marc Koper speaks with the students about the crucial role of chemistry in the energy transition. Guest classes like this are a good way for school students to learn about the academic world,…

Over the past few weeks the world has experienced unprecedented disruption, disorder and over all change. Leiden University was no exception. Not only did all in-person teaching get cancelled and substituted by online classes, the cancellation of open days, information sessions, experience evenings…

From children’s birthday parties to international ambassadors, the Old Observatory attracts a wide range of visitors. Student coordinator Sanne van Beek connects visitors and students, ensuring everyone — from five to sixty-five — learns something about the stars.

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In March 2022, a considerable number of non-Western countries abstained (35) or voted against (5) a resolution deploring Russia’s aggression, its violation of the UN Charter and demanding the withdrawal of its forces from the territory of Ukraine. Even fewer countries subsequently actively supported…

In a festive and intimate award ceremony, plant scientist Omid Karami received the first edition of the Krijn Rietveld Memorial Innovation Award out of the hands of Wim Klop, Director of the Biotechnology Center at DSM. Several speakers spoke about Krijn Rietveld and why Karami deserves the prize that…

Leiden University celebrated its 444th anniversary with a historical procession on 8 February. It celebrated this year’s Dies Natalis in time-honoured fashion with a ceremony in the Pieterskerk, but broke with tradition by sending professors out to primary schools.

Sixteen researchers at Leiden University have received a Veni award from the Netherlands Organisation for Academic Research (NWO). This award offers promising young researchers the opportunity to further develop their ideas for a period of three years.

With a self-converted red camper van, biologists and twin brothers Kevin and Marvin Groen go on a nature adventure in Eastern Europe. Together, they search for wild animals, beautiful nature and places to sport. From a long search for a bear in the Slovakian wilderness to the discovery that pelicans…

From Wednesday 13 July 2022, for four days, Leiden is at the epicentre of European science, as it hosts Europe's largest interdisciplinary conference, the EuroScience Open Forum (ESOF). We interviewed Marja Spierenburg, Professor in the Anthropology of Sustainability and Livelihood. In addition to being…