(260413) -- ST. PETERSBURG, April 13, 2026 (Xinhua) -- A girl views a model of the moon at the Museum of Space Exploration and Rocket Technology V.P. Glushko in St. Petersburg, Russia, April 12, 2026. St. Petersburg marked Russia's Cosmonautics Day with a series of events, including a concert at the Peter and Paul Fortress and free access to the Museum of Space Exploration and Rocket Technology V.P. Glushko, drawing large crowds of visitors. (Photo by Irina Motina/Xinhua)