Where do people go when their time on Earth ends? Trosha the dog asked himself this question when his beloved owner left. Maybe people go where their pets go – to the rainbow? Trosha peered into the rainbow in the sky, but didn’t see anyone there... The answer came unexpectedly: people, cats, and dogs go to a completely different rainbow - the one in space, among the stars. This means that Trosha needs to become an astronaut and fly into space to see his master and, perhaps, stay with him. After going through trials, Trosha managed to become an astronaut and get on a spaceship. And he saw a cosmic rainbow of extraordinary beauty!.. This story is not only for children, although the main character is a dog. But why are we sure that dogs cannot think and feel like people?..