We are now planning to hold the cosmic shear conference in summer 2023.
More details will be published here soon.

We have been closely monitoring the situation with the coronavirus outbreak and the latest guidelines are such that we will not be permitted to hold our in-person meeting in Bochum this summer.  Watch this space for the date of "21 22 23 years of cosmic shear" in summer 2021 2022 2023!


German Centre for Cosmological Lensing (GCCL)

Ruhr-University Bochum, Germany


In the year 2000 four different research groups measured the weak gravitational lensing effect of the large-scale-structure of the Universe for the first time. By measuring the minute distortions in the images of background galaxies induced by the gravitational lensing effect of all the matter between us and these sources and estimating their distance from us, these pioneers established a new observational technique that complements other cosmological measurements due to its unique properties. This measurement, called “cosmic shear”, has become one of the primary science drivers for Cosmology, allowing us to confront a range of different models to explain the origin of the mysterious dark matter and dark energy in the Universe.

Cosmic shear has entered its golden age. Over the past few years so-called stage III surveys like the Dark Energy Survey (DES), the Hyper SuprimeCam project (HSC), and the Kilo Degree Survey (KiDS) have enabled measurements of some cosmological parameters with a precision that rivals the best Cosmic Microwave Background results from the Planck satellite. In a few years from now the next chapter in this scientific endeavour will be written with the arrival of stage IV surveys like LSST, Euclid and WFIRST.

In the summer of 2023 the newly founded German Centre for Cosmological Lensing (GCCL), situated at the Ruhr-University Bochum, will celebrate “23 years of cosmic shear”, reviewing what has been achieved in this rapidly expanding field of cosmological research, discussing the most pressing issues that are encountered when analysing cosmic shear surveys, widening the view to neighbouring fields that are increasingly being used in combination with cosmic shear, and taking an outlook at the promise and challenges of the very large stage IV projects of the next decade.