The title of this particular poster is "His Family", printed at the top just under the name of the series. The center of the poster features a large close-up photo of Yuri Gagarin with his wife Valentina and daughters, Yelena and Galina.
Underneath, the photos capture different moments of Gagarin's life with his family: going to the May 1st demonstration, holding the younger, Galina, high above his head, the moment Yelena got her passport (in the Soviet Union, one's main ID was the passport, not to mistake for an "international" passport. The internal passport did not give you the right to travel abroad). The last photo (bottom right) is of Gagarin and his daughters at the circus.
The bottom margin shows information about the publisher including the number of prints in circulation (just 3000 copies, a tiny number by Soviet standards) and the retail price of 1 Ruble (a typical cheap price from the Soviet era, before the runaway inflation that hit the Soviet, and later Russian economy starting from the early 90s). This series of posters was published in 1990 ahead of the following year's upcoming 30th anniversary of Gagarin's space flight. The posters were apparently created as educational tools, to be displayed in schools, libraries, museums etc.

The poster is in like-new condition, no visible traces of wear of any kind. The colors are strong, not faded. Please note that it will be shipped in a sturdy cardboard box.