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.

A pop-up exhibition ‘All the Einsteins’ will open at Rijsmuseum Boerhaave on 29 May 2019. This is the first time that the museum will present its entire collection of handwritten letters and documents by Einstein. The exhibition marks, among others, the publication of the first photo of a black hole…

An international team of astronomers have become the first in the world to detect isotopes in the atmosphere of an exoplanet. It concerns different forms of carbon in the gaseous giant planet TYC 8998-760-1 b. The research will be published in the scientific journal Nature on Thursday.

Two Leiden scientists - Ignas Snellen and Bernhard Hommel - have been awarded an ERC Advanced Grant. The grant will fund their research over the coming five years on exoplanets and free will.

Under a sunny sky 44 teams completed the Leiden Science Run this weekend. They raised as much as 3450 euros for refugee-students’ association UAF.

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…

Northern lights, stellar winds and exoplanets. This is what astronomer's PhD research revolved around. PhD candidate astronomer Rob Kavanagh developed mathematical models to better understand the interactions between exoplanets and stellar winds and to define features of exoplanets. He will receive…

On Saturday November 16 Alice Twemlow was awarded the Simon Mari Pruys prize for design criticism for her essay ‘Conflicting Definitions of Key Terms’.

The prestigious American Journal of Comparative Law (2016, pp. 790-4) just published a book review of Sofia Ranchordas monograph ‘Constitutional Sunsets and Experimental Legislation’ (Edward Elgar). The book is partially based on her PhD dissertation for which she was awarded a cum laude doctorate degree…

Lecture, Ancient History Research Seminar

Forum essays provide a framework for intellectual exchange and debate about the role of diplomacy around a particular theme. The essays are argumentative contributions and are shorter than research articles.

An overview of awards and prizes granted to our staff and students in 2017, as well as special appointments and royal distinctions.

Tussen de sterren is niet alleen leegte. Er zweven ook stoffen als methanol en koolstofdioxide. Chemische theorieën kunnen nog niet verklaren hoe die zijn ontstaan onder omstandigheden die dat juist onmogelijk zouden moeten maken. Fedor Goumans gaat met een Veni-beurs proberen die vraag te beantwoor…

When galaxies collide, do the black holes at their centre form a supersized black hole? This is what we think happens, but it's not as simple as that, according to Simon Portegies Zwart. Zwart, computer scientist and astronomer, has been awarded a VICI grant to research this phenomenon.

Below is a chronological list of the most recent to oldest publication from the MultiGreen project.

PhD defence

A Centre for Global Heritage will be set up at Leiden University, that integrates the unique global breadth and quality of academic expertise at the University and the Leiden Museums with the global infrastructure of practical consultancy expertise built up over the past years by the Centre for International…

On 16 May the first International Day of Light was celebrated all around the globe. Initiated by UNESCO, organisations in 87 different countries set up a total of more than 600 events to embrace the vital role of light and related technologies in science. In the Old Observatory in Leiden visitors could…

Asteroids, pieces of matter orbiting round the sun, have turned out to be extremely valuable. Asteroid Psyche contains a quantity of metals that together are worth more than the entire global economy. NASA is heading for it.

On 16 May the first International Day of Light was celebrated all around the globe. Initiated by UNESCO, organisations in 87 different countries set up a total of more than 600 events to embrace the vital role of light and related technologies in science. In the Old Observatory in Leiden visitors could…

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…

The Dutch National Student Orchestra will be going on tour again in February. Before that, they will have ten days of rehearsals. The level is high and taking part means a total immersion in music.

Astronomers from the Leiden Observatory and from the University of Rochester (in the US) have discovered that the planetary ring system that covered the very young sun-like star J1407 is actually of enormous proportions. In fact, it’s much larger and heavier than the ring system surrounding Saturn.…

A packaging-free shop, small mobile homes, solar panels on all Leiden's roofs… Jeroen Schrama, alumnus of Public Administration, is a creative world improver. ‘If we really want to save the world, we have to make much more radical choices.’

Eight university vegetable patches will soon join the display at the Hortus botanicus. The sun shone down on almost 40 enthusiastic students and staff as they started work on the new Community Garden there earlier this month.

Biophysicist Anjali Pandit has been awarded a FOM 'Projectruimte' research grant for her proposal ‘Tuning into the photosynthetic membrane with atomistic precision’.

Leiden Professor of Molecular astrophysics Ewine van Dishoeck has been awarded an Advanced Grant by the European Research Council (ERC). She has been awarded 2.3 million euros in research funding for the MOLDISK programme. Within this programme, Van Dishoeck wants to connect chemistry and physics in…

PhD defence

PhD defence

PhD defence

Simon Portegies Zwart, professor of Computational Astrophysics, uses computers to simulate the evolution of stars. We speak with him about his field and about the challenges of working with huge amounts of complex data.

Chemotherapy that does not harm the body, but effectively fights cancer cells: that is the goal of chemist Sylvestre Bonnet and his team. During his PhD research, chemist Xuequan Zhou brought that goal a little closer. He developed molecules that, upon injection in the bloodstream, self-assemble into…

After 25 years, this December will finally see the launch of the long-awaited James Webb space telescope (JWST). Leiden astronomers are watching with great excitement: not only were they involved in the construction of important instruments on board, but the telescope will also reveal many new secrets…

PhD defence

On Friday 10 July the Towards Biosolar Cells research programme was granted a budget of 25 million euros by the Dutch Government. The Ministry of Agriculture, Nature and Food Quality recommended the programme because it will contribute to green energy, improve food supplies and a create a more sustainable…

Yusen Yu wins the prestigious Graduate Student Prize of the Middle East Medievalists (MEM) with his article

The largest galaxies in the Universe feed off cosmic oceans, which helps them grow. This is the presumption of an international team of scientist with two Leiden astronomers, based on observations of the ‘Spiderweb’ galaxy. The researchers published their evidence in Science on 2 December 2016.

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…

Seven prominent North Korean exiles will shed new light on the dictatorial state in a conference hosted by Leiden University on 17 and 18 September. All of the speakers once held high-ranking positions in the regime and now reveal its inner workings.

Our solar system probably evolved in the same way as most of the other planetary systems around us. This has been shown by German-Austrian-Dutch research on more than 870 planet-forming disks in the Orion cloud A. The five researchers, including three from the Leiden Observatory, published their findings…

Molecules are extremely hard to see in visible light, especially without using fluorescence. Leiden physicists have now made their optical technique sensitive enough to image the molecules of their interest in all sizes. Publication in Nanoletters.

Almost 100 billion tons of CO₂ could be pulled out of the atmosphere by the end of the century. That is, if high-income countries switch to a plant-based diet. The double carbon profit of returning farmland to its natural state would equal about 14 years’ worth of agricultural emissions, researchers…

Climate change and energy transition were an important theme of the Dutch provincial elections: how should we invest in new sources of energy? Leiden University conducts multidisciplinary research into renewable energy solutions. Read more about this in the ‘Renewable Energy’ research dossier.

Leiden University Libraries has made a large number of unofficial poetry journals from China accessible online in its Digital Collections. This opens up thousands of pages from an internationally unique collection of unofficial Chinese poetry for teaching, research, and the general public, including…

An international team of astronomers has witnessed a cosmic weather event that has never been seen before.

The American historian and Japan specialist Carol Gluck is the new Leiden Cleveringa professor for the 2014–2015 academic year. On 26 November 2014 she will give the Cleveringa inaugural lecture, in which she will examine how World War II is commemorated in Asia.

Researchers from Japan and the Netherlands who were previously involved in the discovery of an exoplanet with huge rings have now calculated that the giant rings may persist more than 100,000 years, as long as the rings orbit in the opposite direction to that of the planet around the star. Their findings…