This is an Erasmus+ International Credit Mobility project of Leiden University’s Faculty of Science with two Nigerian universities, the Center for Basic Space Science and University of Nigeria.

In 2015, Jorryt Matthee thought he discovered an extremely distant galaxy called CR7, which lacked elements heavier than helium. Three years later, he shows with measurements using the ALMA telescope that the galaxy does have carbon after all, and even in normal concentrations. The American Astronomical…

A Dutch-led team of astronomers has discovered that high-mass stars are formed differently from their smaller siblings. Whereas small stars are often surrounded by an orderly disk of dust and matter, the supply of matter to large stars is a chaotic mess. The researchers used the Atacama Large Millimeter/submillimeter…

The moon exerts a pull on us. The Americans won the space race and were first to land there. In the Universiteit van Nederland, space law expert Tanja Masson explores the questions that this raises. Who owns the moon and the valuable resources that are found there?

The people behind The Hague Journal of Diplomacy and its online platform.

With its iconic buildings, Leiden University has a strong presence throughout the city. The university has left its mark clearly on museum collections in the city.

By effectively integrating word-class scientific research and excellent education, you will become a professional astronomer with an internationally recognized degree.

Researchers at Leiden Observatory study the fundamental physics that creates structure in the Universe. These processes collect matter into galaxies and gas into stars. With the use of powerful telescopes and advanced calculations and computer simulations, Leiden astronomers seek to understand the origin,…

By effectively integrating word-class scientific research and excellent education, you will become a professional astronomer with an internationally recognized degree.

By effectively integrating word-class scientific research and excellent business education, you will become a professional astronomer with an internationally recognized MSc degree prepared for technological business challenges.

The two-year Astronomy and High-Tech Innovation master’s specialisation places you at the heart of the latest astronomical discoveries, cutting-edge instrumentation, high-precision measurements, and innovative technologies in advanced instrumentation engineering. The programme is supported by researchers…

By integrating world-class scientific research and education, you will become a professional physicist with an internationally recognized degree.

By effectively integrating word-class scientific research and excellent education, you will become a professional astronomer with an internationally recognized degree.

The ‘Locke drawings’ collection and the representation of Brazilian native peoples in global perspective

When you apply for admission, you’ll be asked to submit several documents.

The Leiden University Institute for Area Studies (LIAS) is devoted to the study of places in the human world from antiquity to the present time in a comparative and interdisciplinary perspective.

For centuries astronomers studied the Universe by collecting light. Nowadays, we are living in times of great technological advancements, which allow us to explore our Universe in a new way - though gravitational wave radiation.

This thesis is a (biased) journey through very different topics in astrophysics: quasars and new populations of active galactic nuclei, gravitational waves from merging black holes, and protoplanetary discs around young stars.

Planets are formed in disks of gas and dust around young stars.

This thesis explores the theoretical and observational properties of distant massive galaxies that harbour active black holes in their centres and shine brightly at radio wavelengths.

Understanding the formation and evolution of planetary systems is one of the most fundamental challenges in astronomy. To directly image and study young exoplanets and the circumstellar disks they form from, dedicated high-contrast imaging instruments are built.

One of the key limitations of the direct imaging of exoplanets at small angular separations are quasi-static speckles that originate from evolving non-common path aberrations (NCPA) to which the primary adaptive optics system is inherently blind. The main focus of this thesis is the development and…

Promotores: F.H. van Lunteren, F.P. Israel

Nowadays, it is well known that hydrogen and helium (and small traces of lithium and beryllium) were created shortly after the Big Bang, while the heavier elements are created in the cores of stars at different evolutionary stages. When these stars explode as supernovae, they expel metals synthesised…

Low-mass main-sequence stars like our Sun are continuous sources of outflowing hot magnetised plasma. In the case of the Sun, this is known as the solar wind, whereas for other stars they are called stellar winds.

This thesis describes the development and validation of new high-contrast imaging techniques, with the ultimate goal of enabling the next generation of instruments for ELT-class telescopes to directly image Earth-like extra-solar planets orbiting around nearby stars.

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

This thesis focus on the interaction between M dwarf stellar winds and Galactic cosmic rays and the possible effects on the habitability of exoplanets.

It has now been well established that shocks and turbulent motions in the intra-cluster medium (ICM) generated through cluster mergers can produce large-scale synchrotron emission.

The Jeugdwerkgroep is a national astronomy association for young people who are interested in astronomy. The Leiden section organizes a monthly meeting in the Old Observatory Leiden.

On the largest scale, the Universe resembles a cosmic spiderweb. Most galaxies coexist in small groups within the threads of this web. At the nodes of the threads are enormous groups of galaxies forming the largest structures in the universe still held together by gravity: clusters of galaxies.

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

Over the last three decades, the discovery of exoplanets has revealed the boundless variety of worlds beyond our own Solar System⁠. Majority of planetary systems contain short-period planets that are larger than Earth but smaller than Neptune⁠.

The Leidse Weer en Sterrenkunde Kring (LWSK) is a society of amateurs interested in astronomy, space travel and meteorology. The association organises a monthly lecture on a fascinating subject, given by an expert in the field.

In this thesis, I study the formation of large-scale structure and the physics of particle acceleration at large scales (~Mpc).

Promotor: Christoph U. Keller, Co-promotores: Matthew A. Kenworthy, Frans Snik

Promotor: Prof.dr. H. J. A. Röttgering, Co-Promotor: Dr. M. Haverkorn

Welcome to the Hensen Lab! We are a young dynamic experimental research group starting at the Leiden Institute of Physics. Our lab addresses one of the key challenges of modern physics: understanding the interface between quantum mechanics and general relativity.

The Leiden Science Young Talent Award celebrates a student who completed their bachelor’s degree with an outstanding thesis.