Crossword puzzle clue "first human in space"

Cosmonaut Leonov, the first human to walk in space

First human in space

First human in space

First Hispanic woman in space, aboard the space shuttle Discovery in 1993: 2 wds.

First space shuttle to visit the International Space Station

First African-American woman in space, aboard the space shuttle Endeavour in 1992: 2 wds.

It could be spread human-to-human

What space aliens dislike being in human society?