Supervisor: S.F. Portegies Zwart Co-Supervisor: A.G.A. Brown

Even though more than 4000 extra-solar planets are known today, only a small fraction of these has been captured in an image. To better understand the planet formation mechanisms in solar-like environments we started the Young Suns Exoplanet Survey (YSES).

Physicist Christopher Berg Smiet, who recently obtained his PhD in Leiden, has been awarded an NWO Rubicon. The grant allows him to conduct postdoctoral research for two years at the Princeton Plasma Physics Laboratory (PPPL) in the United States.

The Leiden Observatory is starting a crowdfunding campaign to raise enough money to construct a new telescope.

A team of astronomers led by Dutch scientists have directly imaged a giant planet orbiting at a large distance around a sun-like star. Why this planet is so massive, and how it got to be there, is still a mystery. The researchers will publish their findings in the journal Astronomy & Astrophysics.

De Franse uitnodiging van president Marcron aan Nederland en zes andere Europese bondgenoten, om te praten over ‘uitgebreide nucleaire samenwerking’, past volgens het internationaal recht binnen het bestaande verdrag uit 1970, zegt Anna Marhold, expert in internationaal recht, in Dagblad Trouw.

Staring into the clouds hoping for a glimpse of the sun, cheering in encouragement, video recordings: there was no shortage of things to do at the Leiden Observatory. More than 600 visitors witnessed the last, almost complete solar eclipse of the decade..

A team led by Leiden University in the Netherlands and the National Radio Astronomy Observatory have, for the first time, robustly detected semi-heavy water ice around a young sunlike star. In this ice, some of the ordinary hydrogen atoms have been replaced by deuterium, a heavier variant of hydroge…

The focus of this thesis is how stars like our Sun and planets like Jupiter, Saturn, and Earth are formed.

ALMA has observed stars like the Sun at a very early stage in their formation and found traces of methyl isocyanate - a chemical building block of life. This is the first ever detection of this prebiotic molecule towards solar-type protostars, the sort from which our Solar System evolved. The discovery…

Twee jaar geleden klaagde promovendus Danny Mekić het socialmediaplatform X aan, omdat zijn account, zonder toelichting, onvindbaar werd gemaakt. Hij kreeg gelijk van de rechter, maar X verzet zich ertegen: ‘Twitter wil niet transparant zijn.’

Monique Koemans werkt sinds 2,5 jaar op de Nederlandse ambassade in de Verenigde Staten. 'Leiden is een opvallende rode draad in mijn leven.'

Landen proberen steeds strengere maatregelen te nemen om minder aantrekkelijk te worden voor asielzoekers. Mark Klaassen, universitair docent vreemdelingenrecht, noemt het Europese asielbeleid in de Volkskrant ‘een race naar beneden.’

Lidstaten negeren steeds vaker gemaakte afspraken wanneer het hen uitkomt, waardoor de grondbeginselen van de VN meer dan ooit onder druk komen te staan. In een recente VN-spoedvergadering hekelde topman Guterres de lidstaten en zei dat ‘het handvest geen menu á la carte is.’ Niels Blokker, emeritus…

Leiden University has partnerships in the local region, in the Netherlands, in Europe and with countries on almost all the world's continents. Students and researchers benefit from these partnerships, but society is also a beneficiary, says Rector Carel Stolker.

The solar system was formed approximately 4.56 billion years ago. Despite the numerous theories that have been developed over the years, the formation and evolution of the solar system still remain unclear.

As South Korean president Moon Jae-in prepares to leave office, North Korean leader Kim Jong Un has thanked him for trying to improve relations. Assistant Professor Christopher Green explains in the Calgary Sun what impact North Korea's gesture of goodwill might have.

De positie van kunst en kunstenaars in de westerse samenleving

Corrie Bakels is known as one of the founders of bio-archaeology in the Netherlands. One of her former students, Dr Marco Langbroek, active in astronomy, made a request to the International Astronomic Union to name a recently discovered asteroid after her. Hearing the news, Bakels was astounded. 'My…

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…

‘Take science communication more seriously.’ This is the message that Ivo van Vulpen, professor by special appointment in Science Communication in Physics, wants to convey during his inaugural lecture. At the moment, a lot of researchers look down their noses at this while it is extremely important…

No sitting in lecture halls, no coffee at the JuCa: Leiden Law School students will have to follow lectures and do exams from home for the time being. A huge transition.

Thousands of first-year students and hundreds of mentors kicked off the EL CID on Monday morning. This year for the first time, the introduction week of Leiden University and Leiden University of Applied Sciences was also open for students of Regional Training Centre mboRijnland and the Leiden Instrument…

Sonja Barend distantieert zich van het toneelstuk Sonja, dat gebaseerd is op haar boek. Dirk Visser, hoogleraar intellectueel eigendomsrecht, gaf uitleg in het AD: ‘De auteurs hebben het recht om te zeggen dat ze niet meer achter de productie staan.’

Using the James Webb Space Telescope, an international team of researchers, including Leiden Professor of Molecular Astrophysics Ewine van Dishoeck, has discovered a palette of hydrocarbons in a planet-forming disc around a young, low-mass star. The results confirm that discs around very lightweight…

From chilling on the beach to a speech by the mayor. HOPweek is a speedy way for hundreds of ‘Leiden’ students who are going to be studying in The Hague to get to know each other. Many of them come from abroad. ‘I actually dare to cycle here.’

Astronomers led by Leiden PhD candidate Richelle van Capelleveen have, for the first time, discovered an exoplanet that has carved a bright gap in the protoplanetary disc around its star. This rare observation provides new insights into how young planets shape their surroundings.

On the 19th of April, Iris van de Voorde successfully defended a doctoral thesis. The Leiden University Centre for Linguistics congratulates Iris on this achievement!

The Department of Constitutional and Administrative Law of Leiden University is active in education in various ways.

Do people actually understand the constitution? This is what Jelle But, PhD candidate at Constitutional and administrative law, wondered. To find out, he conducted a survey among 1333 respondents. His research shows that lawyers and other legal professionals actually do not have a better understanding…

The fact that a significant number of seats in the Dutch provincial councils are now occupied by members of the Dutch Farmer-Citizen Movement (BoerBurgerBeweging, BBB) who have an agricultural background need not lead to conflicts of interest when voting on, for example, nitrogen emissions. This is…

On 6 June 2019, Edward Donelan defended his thesis 'Regulatory Management Policies and a Universal Model for Public Policy Making, Legislative Drafting and Managing Stocks of Legislation'. The doctoral research was supervised by Prof. W.J.M. Voermans.

Rainbow flags, funky sounds and drag queen Petty Libel: the very first Canal Pride Leiden has become reality. Leiden University joined the parade with a packed and buzzing boat. ‘The Leideners were really supportive and gave us a great response.’

Alumni event, Lezing

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The Old Observatory has a rich history. On this page you will find a short version of the history that took place in the observatory.

Leiden University has participated in an international study carried out by the CARMENES consortium, which has discovered two small, terrestrial planets around Teegarden’s Star. The planets have masses similar to Earth and their temperatures could be mild enough to sustain liquid water on their surf…