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)

People view the descent module of Russia's Soyuz spacecraft 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)

People view the return capsule of a topographic mapping satellite 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)

A concert in celebration of Russia's Cosmonautics Day is held by students from the Mozhaisky Military Space Academy 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)

A concert in celebration of Russia's Cosmonautics Day is held by students from the Mozhaisky Military Space Academy 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)

People visit 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)