IPA: /ˌæstrəˈnɔtɪkli/
KK: /ˌæstrəˈnɔtɪkli/
In a manner related to space travel or the activities of astronauts.
The mission was planned astronautically to ensure the safety of the crew.
Astronautically → It is formed from "astro-" (from Greek "astron", meaning star) and "nautis" (from Greek "nautes", meaning sailor) combined with the suffix "-ically" (meaning in a manner relating to). The word "astronautically" refers to matters related to the navigation or travel of a sailor among the stars.
Think of a 'sailor among the stars' — 'astro-' means star and 'naut' means sailor, so astronautically relates to traveling in space.