Astro

Ongoing Serial: a series of episodes, published over a span of weeks/months/years where the story plot is connected from chapter to chapter and must be read in chronological order for it to be understood properly.
Chapter Serial: a series of episodes, published over a span of weeks/months/years where the story plot is self-contained to a single chapter. There may be an overarching plot, but the stories can generally be read in any order and be understood
Book: an all-in-one self contained story published as a one-off.
Supplement: an an all-in-one self contained story published as a stand-alone supplement to a regular weekly/monthly periodical.
Short Story: an all-in-one, self contained story that was published in a regular weekly/monthly periodical
Anthology: a collection of all-in-one, self contained stories that were published in a regular weekly/monthly periodical but are generally grouped together.

Ambassador Atom [Astro Boy] (Manga)

Astro Boy (1952-68), Chapter 000 ‘Ambassador Atom’ (アトム大使), was originally serialized on a monthly schedule from April 1951 to March 1952 in Shonen.

Astro Boy (Second Grader)

Astro Boy's final regularly serialized series began 1980, to coincide with the release of the new animated television show. This new Astro Boy (1980-81) manga series began appearing in Second-Grader [小学二年生], a monthly magazine targeted at young students learning to read.

Astro Boy (Shonen)

One of Osamu Tezuka’s longest-running manga serials, Astro Boy (1952-68) followed directly on the heels of the moderately successful Ambassador Atom (1951-52) in the pages of Shonen, published by Kobunsha. It began monthly serialization in April 1952 and would continue for the next 16 years, until March 1968.