The noted Swedish composer, Karl-Birger Blomdahl, had a considerable success
with his space opera ANIARA. This was premiered in Stockholm in 1959, and was
later brought to the UK where it received widespread acclaim. It was a
paradigm of man's journey through time and space.
But I suspect that it may not have worn very well, and I do not know whether
it is still given occasionally in Sweden.
NICOLAS PALMER London