Acta Mega-Astrophysicalis was periodical literature, a well known scientific journal specializing in various space sciences during the 23rd century.
History and specifics[]
Many contributions to the journal were submitted by Federation and Starfleet scientists. In the year 2275, Commander Spock had submitted an article to the journal regarding "the kinetics of nuclear regions in barred-spiral galaxies". (TOS novel: The Wounded Sky)