Ginga Tetsudou Monogatari: Wasurerareta Toki no Wakusei
English title: The Galaxy Railways: A Letter from the Abandoned Planet
Japanese title: 銀河鉄道物語 ～忘れられた時の惑星～
Alternative titles: The Galaxy Railways: Planet of Forgotten Time
Type: OVA
Source: Original
Episodes: 4
Status: Finished Airing
Aired: Dec 30, 2006 to Apr 25, 2007
Duration: 30 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Planet
Licensors: Discotek Media
Genres: Drama, Sci-Fi
Themes: Space

This is the OVA of The Galaxy Railways.

The Galaxy Express 999 crashes on the off-limits planet of Herise and it's up to the SDF Sirius Platoon to assist. 

(Source: Wikipedia)