The spacecraft also carried Soviet pennants which were located on the probe and on the "Luna 2" rocket. The two sphere-shaped pennants in the probe had surfaces covered by 72 pentagonal elements in a pattern similar to that later used by association footballs. In the centre was an explosive charge designed to shatter the sphere, sending the pentagonal shields in all directions. Each pentagonal element was made of titanium alloy; the centre regular pentagon had the State Emblem of the Soviet Union with the Cyrillic letters "СССР" ("USSR") engraved below and was surrounded by five non-regular pentagons which were each engraved with "СССР СЕНТЯБРЬ 1959" ("USSR SEPTEMBER 1959"). The third pennant was similar engravings on aluminium strips which were embossed on the last stage of the "Luna 2" rocket.