Song: Unknown
Instrument: Piano
Album: Unknown (From Anime Episode)
From Galaxy Express 999 Episode 89

http://www.crunchyroll.com/galaxy-express-999/episode-89-528062
The song plays at point 6:35 within the episode.

Comments: I absolutely love the piano song played in this episode. I would truly appreciate it if the sheet music is found or if someone were to create it.

Best Regards.