First a link to his wiki page
Since Holst died all the way back in 1934 I’m not going to try and find a home page for him.
One interesting fact that I think everybody already knows about Holst is that he lived next door to Jimi Hendrix.
To be honest, I don’t know a lot about what music Holst put out, but I do like the planet suite.
So lets start with Mars (I think everyone knows Mars)
Jupiter
Mercury
And Uranus