Charlier gathered a large number of apprentices, such that one talked about "lundaskolan" within astronomy, referring to the statistical methods for analysing the structure of the Solar System used by Charlier and his apprentics.

This picture shows Frida Palmér standing by the meridian circle, which had been installed at Lund Observaotry in 1874. This meridian circle was used make 35 413 observations of 11 446 stars between the declination of 35 and 40 degrees between the years 1878-1882 and 1892-1895. These observatoins were a part of an international effort to map the night sky to high accuracy.

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