Music by Kevin MacLeod. Available under the Creative Commons Attribution 3.0 Unported license. Download link: https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100186

MacLeod's description:

Genre: Soundtrack
Length: 3:18
Instruments: Orchestral - Full

Themes, rhythms, chords all stolen from Holst. 043
ISRC: US-UAN-11-00186
Dark, Epic, Relaxed 2004