It’s spring again and Pollux organises the annual Round trip of the Sol System. The idea is to bike around the Sol System model located in Espoo and Helsinki (http://www.ursa.fi/tahtitieteesta/aurinkokuntamalli.html). The model is in scale 1:1 000 000 000 and the whole round trip is around 20 billion kilometers. Average velocity is – depending on the bicyclist – around 10c. The trip begins around 17.00 near Smökki and takes around 2 hours. After the bicycling, there’s sauna and some snacks at Rantasauna. You can join the sauna even if you don’t want to cycle!