During our tours of the Ondřejov Observatory we always tell you that once every few years the main mirror of the largest Czech telescope is
Category: Perek-2m
![](https://stel.asu.cas.cz/en/wp-content/uploads/2023/01/233-adleo-heinzel-en.jpeg)
Astronomers from Astronomical Institute (AI) in Ondřejov studied the red dwarf star AD Leonis, which is known for its significant flaring activity. They coordinated the