Punching Back is a detailed ethnographic study that demonstrates that young Muslim women who kickbox develop agentive selves by challenging gender norms, challenging expectations, and living out their religious subjectivities.

Promotor: H.J.A. Rottgering, Co-Promotor: R.J. van Weeren

One of the key quests in astronomy is to study the growth and evolution of galaxies across cosmic time. Radio observations provide a powerful means of studying the formation of stars and subsequent buildup of distant galaxies, in a way that is unbiased by the presence of dust.

An investigation into how racial stereotypes were created and used in the European Middle Ages.

After almost twenty years the record for the most distant radio galaxy has been broken. A team of astronomers led by Leiden PhD candidate Aayush Saxena has discovered a radio galaxy from the time when the universe was just one billion years old. The galaxy is at a distance of 12 billion light years…

Michiel Pronk defended his thesis on 30 March 2016

An international team of astronomers, with researchers at Leiden Observatory playing a leading role, has mapped the fuel for galaxy formation in the iconic Hubble Ultra Deep Field. The results of the research have been accepted for publication in The Astrophysical Journal.

Most of the vast Tibetan literature was authored by monks. They were Buddhists par excellence, educated in a system in which Indic- and Indian-inspired texts played a pivotal role. What they wrote was primarily religious or philosophical in nature, but also extended to ‘secular’ topics. Through the…

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…

Our research primarily focuses on the early universe and its origins in theories that go beyond the Standard Model of particle physics.

Within the field of astronomy, understanding how galaxies grow and evolve from the Big Bang to the present day is a challenging and complex question.

Promotor: K. Kuijken, Co-Promotor: H. Hoekstra

In 2018, astronomer Jorryt Matthee won the C.J. Kok Jury Prize for the best dissertation of the Faculty of Science. He succeeded in finding a number of rare galaxies from the early Universe. One of them received the same initials as football player Cristiano Ronaldo: CR7.

Promotor: K.H. Kuijken

Een onderzoek naar de formulering, structuur, rechtshistorische aard en sociale en religieuze achtergronden van Laat-Egyptische (demotische) tempeleden, aangevuld met 70 ongepubliceerde teksten.

My work is motivated by the necessity to extend Standard Model of Particle Physics in order to explain three observed phenomena that this great theory fails to accommodate

The Faculty of Humanities has two advisory groups for Diversty & Inclusion: one for staff members and one for students.

Leiden University has a rich history in the domain of Papyrology. Papyrology+, founded in 2014, is a collaboration of Leiden scholars studying (Abnormal) Hieratic, Demotic, Aramaic, Greek, Latin, Coptic, and Arabic papyri from a socio-historical, economic and linguistic perspective.

Markus Altena Davidsen’s PhD dissertation is the first major study of Tolkien Religion. In it, he analyses the religion that is based on the stories by acclaimed British fantasy author J.R.R. Tolkien. He also discusses how fiction itself can become religious. Davidsen will defend his dissertation on…

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.

Galaxies in the early universe are shrouded in a kind of mist: a cloud of hydrogen. With galaxies in the later universe this mist has disappeared. Astronomer Jorryt Matthee has made the first images of this dissipating mist. PhD defence 19 September.

How do galaxies form? That is what astronomer Mariska Kriek will be researching in the coming years. She received an NWO Vici grant of 1.5 million euros to study galaxies in the early universe. ‘This research uses new and unprecedented observations from the James Webb Space Telescope (JWST). These allow…

A Dutch-Italian-German team of astronomers has observed a huge glow of radio emission around a cluster of thousands of galaxies. They combined data from thousands of LOFAR antennas that were focused for 18 nights on an area the size of four full moons. This is the first time astronomers have been able…

Researchers have discovered the most distant Milky-Way-like galaxy yet observed. Dubbed REBELS-25, this disc galaxy seems as orderly as present-day galaxies, but we see it as it was when the Universe was only 700 million years old. This is surprising since, according to our current understanding of…

An international team of more than 200 astronomers from 18 countries has published hundreds of thousands of unknown galaxies. The data are part of a project lead by Leiden professor of Observational cosmology Huub Röttgering. Both Dutch and international media reported extensively about the publica…

We explore the particle physics and quantum world at the time of the big bang.

By looking at stars in dwarf galaxies research Bas Zoutendijk is trying to gain new insight into dark matter.

This thesis presents pioneering work on the panchromatic emission of some of the most luminous galaxies in the early Universe: star forming galaxies and active galactic nuclei.

An international team of researchers led by Leiden University (the Netherlands) has mapped nine gigantic collisions of galaxy clusters. The collisions took place seven billion years ago and could be observed because they accelerate particles to high speeds. It is the first time that collisions of such…

An international team of astronomers has discovered a large reservoir of hot gas in the cluster-in-formation around the Spiderweb Galaxy. Based partly on that hot gas, the astronomers predict that the cluster-in-formation will grow into one of the largest objects in the universe. A step closer to discovering…

Media all around the world reported about it: the most detailed images yet seen of galaxies, shot by radio telescope LOFAR. The international team behind these amazing results were led by Leah Morabito at Durham University and included three talented Leiden astronomers.

Promotor: Prof.dr. H.W. Lenstra

Where did the new generation of antislavery activists get their inspiration to organize in large-scale pressure groups?

The unit residue group, to which the present thesis is devoted, is defined using the norm-residue symbol, which Hilbert introduced into algebraic number theory in 1897.

ESA’s Gaia mission has produced the richest star catalogue to date, including high-precision measurements of nearly 1.7 billion stars and revealing previously unseen details of our home Galaxy.

Chaider Bamualim defended his thesis on 9 September 2015

What legislative and regulatory questions arise when children, adolescents or elderly people use the Internet?

In the summer school 'Medieval Religion' students will be challenged by specialists in the field of medieval religion to position and develop their own research in relevant scholarly and cultural contexts. The instructors will give masterclasses from their own specialties. Deadline for registrations:…

Ömer Gürlesin defended his thesis on 28 November 2018

Is the American government behind the attacks on 11 September 2001? Could it be that the white contrails emitted by planes in the sky are actually ‘chemtrails’: chemicals that are deliberately being spread amongst us? And did the Dutch intelligence service order the murder of Dutch politician Pim Fortuyn?…

Promotor: W. Jaffe, Co-promotor: K. Meisenheimer