Planetarium de Bretagne is 0.8 mi (1.3 km) from central Pleumeur-Bodou, why not stop by during your stay. If you want to experience more of the culture Pleumeur-Bodou has to offer, head to Village Gaulois, Le Radome, and Golf de Saint Samson.
You can spend an afternoon exploring the galleries in Le Radome in Pleumeur-Bodou. While you're in the area, stroll along the seaside.