Operas about Astronomy/Astrology:
"Harmony of the World" (1957) - Paul Hindemith
"Aniara" (1959) - K.B. Blomdhal

Did you included soundtracks of the sci-fi/space opera`s movies/tv series?
John Williams - "Star Wars", "ET", "Third encounters of the third kind"
Vangelis - "Blade Runner"
W.Carlos - "Clockwork Orange"
Alexander Courage - "Star Trek"
??? - "Lost in the Space"(Robinson Family and Dr. Smith's adventures)

Edson Tadeu Ortolan
[log in to unmask]

[I believe many composers wrote original music for Lost In Space,
 including Hans Salter, Alexander Courage, Alfred Newman, Herman Stein
 and others, but I think the theme is by John Williams.  -Dave]