Planetes

From Dark Horse:
In the 2070s, increased interplanetary travel has led to crisis-level amounts of dangerous space debris, and someone has to clean it up. Planetes follows the space-garbage crew of aspiring explorer Hachimaki, mourning Yuri and secretive Fee.

Official Japanese:
Kodansha, Mechacomic, Piccoma

Note: Won the Seiun Award in 2002.