From the article: "(This was in addition to the canine companions that flew with Ivan, in the proud tradition of the Soviet space program: Chernushka ("Blackie"

From the article: "(This was in addition to the canine companions that flew with Ivan, in the proud tradition of the Soviet space program: Chernushka ("Blackie") for his first flight, and Zvezdochka ("Little Star") for his second.)"