The song is named after the star constellation Orion
Rumored to have been Cliff's favorite song to play
The song was played at Cliff Burton's funeral on October 7th, 1986.
Speculation is that this may be the reason the song was
not played in full at a live show until almost 20 years after it's release. It has become kind of a "Cliff's Song".
In many fans' opinion it is a tragedy that this song was not included in the S&M recordings.
Originally only played in pieces in the Instrumental Medley from 5/19/93-7/4/93,
the first half of the song was played in earnest
for the first time on November 13th, 2005. Was then played in full for the first time on June 3rd, 2006. Lars said that playing Orion was the highlight of that set for him because it was like a tribute to Cliff Burton.
Because of the song's relation to Cliff, it is a very emotional song for the
band to play. James has been quoted saying he
has cried when playing it.
Included in the video game Guitar Hero: Metallica and can be exported to GH: Warriors Of Rock.
Lars has said that Orion started as bits and pieces of other songs thrown together.
To celebrate the 20th anniversary of the release of the Master of Puppets album, the band Mastodon did a version of Orion for Kerrang! magazine.
There are two bass solos in the song that are often mistaken for guitar solos. Thus is the magic and talent of Cliff Burton.
The band said that they picked the name Orion because the middle part sounds "spacey" and "starry".