Futatsu no Spica

[MangaDex]

 

[bbtora]

Rest of the manga (volume 7 to 16) was never scanlated maybe due to this being licenced by Vertical (which is complete btw).

 

[Kevhammmer]

One of the most heartwarming series I've ever read. Mature and realistic in its own way.

 

[albertorayo]

Gotta find me the end of this series

 

[Sherezade]

Gotta find the rest too! But, up until know it's a beautiful story..

 

[Braven64]

This title was one of my first manga that I've ever read. I love this series so much that I got the illustration book.
🚀🌌👨‍🚀💫🦁💫👩‍🚀🌠
Edit: I'm glad that the full series is on Internet Archive. (Bit low quality, but readable)

 

[uym]

Shame this was not completed here. Having just re-watched the anime I fancy reading the manga. I actually have the official English releases 1-10 and 12, but 11 is gold dust (10 and 12 were also hard to find) due to Vertical heavily cutting back on print numbers and also selling US only. I did manage to complete reading the whole thing by buying several chapters for my Amazon Kindle, though there the Chapters were split differently.
(note still looking for #11 but think I have only seen it twice in the last 10+ years and both times for over $100!!