What danger is lurking for us from space? Look up at the night sky with astronomer Miloš Tichý, who will explain what such space observation looks like, but also by what means humanity protects itself from space. This picture will first take us to the space observatory Kleť in Šumava and then we will look into the distant universe, where we will focus mainly on asteroids. A professional astronomer introduces us to his work, points out its advantages and disadvantages, but also introduces a multinational space project that is trying to avert the same calamity that killed our predecessors, the dinosaurs. How do these experiments take place and what role do even seemingly small observatories like ours play in them?