Castelló Planetarium marks International Dark Matter Day on Saturday 31 October 2026. The full-dome film “Phantom of the Universe” screens at 17:00, followed at 18:30 by a public science talk about the evidence for dark matter and the challenges of studying it. This special programme explores one of the biggest mysteries of the cosmos. Organised by Planetari de Castelló / Ajuntament de Castelló. Admission is free, subject to capacity.
17:00
