The Galaxy Railways: A Letter from the Abandoned Planet is a oVA anime that premiered in winter 2006.

About the production: the story comes from an original script, there are 4 episodes of about 30 minutes and its current status is "finished".

Its main genres are drama and sci-fi.

On AniList, The Galaxy Railways: A Letter from the Abandoned Planet has an average score of 65%, a good score, and appears on 1,045 users' lists.

The franchise continues in or follows from: Ginga Tetsudou Monogatari and Ginga Tetsudou Monogatari: Eien he no Bunkiten.

In the distant future, the planets are now connected with a massive galactic railway system. The Galaxy Express 999 has crash landed on a mysterious planet. On board are The Conductor, Killian, Maetel, and Tetsuro, a ten year-old street urchin with a heart of gold. Now it’s up to the SDF Sirius Platoon to rescue them before the Herise Time Mystery—a rift in the deep axis of time and space—repeats. (Source: Crunchyroll)

Official synopsis from AniList.