NANOCOSMOS is highlighted at the “In Focus” section of the Leiden Observatory AstroPAH newsletter (The Netherlands). AstroPAH is focused on research about Polycyclic Aromatic Hydrocarbons (PAHs) in astronomical environments. NANOCOSMOS will try to shed light on the formation of these species, which is poorly understood. In the article, a brief presentation of the project is presented with the main scientific goals, the Stardust machine (cover image on the left) that will be devoted to produce and analyze in-situ highly-controlled analogs of the dust grains in a versatile ultra-high-vacuum experiment and other experimental set-ups to analyze the molecular content of the nanoparticles that will be produced in the different simulation chambers.