https://phys.org/news/2018-06-giants-dynamics-dwarf-satellite-galaxies.html > 'This is a major problem that lacks an answer', tells Cautun. 'It could signal a fundamental breakdown of the current cosmological model. Or alternatively, that our own galaxy is very atypical: a 1 in a 1000 system.' Studies of  dwarf satellite orbits cannot yet be carried out for other giant galaxies, such as our close neighbor the Andromeda galaxy. Therefore the only option is to examine the Milky Way in more detail. > Cautun hopes his research will deliver ground-breaking new insights into the anomalous dynamics of the Milky Way satellites and uncover the formation history of our galaxy. Cautun will first investigate the phenomena that give rise to the atypical orbits of the satellite galaxies. The satellite galaxies form some distance away from the Milky Way and then are accreted onto the dark matter halo of our own galaxy. 'This accretion of satellites takes place along preferential directions, the so called filaments of the cosmic web. I will study to what extent this process induces correlations in the orbits of satellite galaxies', explains Cautun.