The Oskar Klein Centre

An interdisciplinary research environment to tackle fundamental questions about our Universe.

A digital twin of the universe to understand the Big Bang

– I try to gain a full understanding of how the universe was created 13.8 billion years ago, says Jens Jasche.

Artist impression of the double star system

Research at OKC

Research at the OKC is organized in different working groups

Who was Oskar Klein?

Oskar Klein was Sweden's most well-known theoretical physicist.

Welcome to the Oskar Klein Centre!

We investigate central issues in cosmology, astrophysics, and particle physics.

The Oskar Klein Centre (OKC) is a collaboration between the departments of astronomy and physics at Stockholm University, and the department of physics at the Royal Institute for Technology (KTH).

The Centre is a vibrant research environment for scientists investigating fundamental questions about our Universe. What is the nature of dark matter and dark energy? What is the structure and fate of our Universe? How do galaxies form and evolve? How do extreme objects like supernovae, neutron stars and black holes behave? What is the correct theory of gravity? The OKC brings together theorists, observers and experimentalists at the cutting edge of research about our Universe.

News

2025-07-08

Oskar Klein Centre

Final steps in stage-iii surveys: kilo-degree team gathers at OKC for 6x2pt legacy analysis workshop

Last week, a small team of cosmologists from Spain, Germany, the Netherlands, and Sweden gathered at the Oskar Klein Centre (OKC) in Stockholm for an intensive workshop focused on finalizing the Kilo-Degree Survey (KiDS) 6x2pt Legacy Analysis.

2025-07-08

Oskar Klein Centre

OKC Day 2025 Highlights Latest Advances in Cosmology

On May 28, 2025, the Oskar Klein Centre (OKC) hosted its annual OKC Day at Stockholm's National Museum of Science and Technology. The event featured presentations from leading researchers highlighting recent achievements, ongoing challenges, and future opportunities in cosmology and astrophysics.

2025-06-30

Oskar Klein Centre

LSST telescope launched – New era of research at the Oskar Klein Centre

The Vera Rubin Observatory's new LSST telescope is now operational, marking the start of a new era in astronomical research at the Oskar Klein Centre (OKC). With funding previously granted by the Knut and Alice Wallenberg Foundation totaling SEK 30 million, OKC now significantly enhances its capability to explore fundamental questions about the universe.

Image of LSST sensor in a clean lab environment

Astronomy and Cosmology Physics

2025-04-01

Oskar Klein Centre

A Warm Welcome to Associate Professor Azadeh Fattahi!

We are delighted to announce that Dr. Azadeh Fattahi has joined the Oskar Klein Centre (OKC) at Stockholm University as an Associate Professor in the Department of Physics. Her arrival is supported by the prestigious Wallenberg Academy Fellowship, awarded for her exciting research project, "Probing Cosmology with Faint Dwarf Galaxies."

Astronomy and Cosmology Physics

Calendar

3 September

—

4 September

Conference

AI for Science

This timely symposium, held under the auspices of the Royal Swedish Academy of Sciences, brings together leading researchers from academia and industry to explore the transformative impact of AI on science. Co-hosted by the newly launched EDUCATE Centre of Excellence—funded by the Swedish Research Council—the event offers a unique forum for cross-disciplinary exchange and collaboration at the intersection of science and artificial intelligence.

AI for Science

Digitalization and AI

18 November

—

19 November

Conference

7th Annual Conference of the Nordic Network for Diversity in Physics (NORNDiP)

We are excited to announce that registration is now open for the 7th Annual Conference of the Nordic Network for Diversity in Physics (NORNDiP), taking place at Chalmers University of Technology in Göteborg, Sweden on November 18–19, 2025