I bring this point up in a Solaris review, because Marsbeli Kronikak is the gem in the rough - the very best symphonic prog album in that 3 year time frame. Isolated in still Communist Hungary may have played a role in that - not to mention a relatively more lenient regime in regards to the arts than other Iron Curtain countries at the time.
Recently I had reviewed Tako's second album, and talked about symphonic fusion - a genre that isn't recognized today, but was frequently referred to 25 years ago and beyond. And that's exactly where you'll find the music of Solaris. The primary difference here is the copious use of sequencer based electronics that lay the bedrock for the symphonic progressive music on top. Attila Kollar's flute is magnificent as ever,and he often drives the instantly-recognizable Solaris style melodies. Istvan Cziglan's hard edged guitar, and Robert Erdesz's fine synthesizer work round out the leads.
For us prog fans back in the mid 80's who were desperate for quality 70s styled progressive rock, Solaris was a godsend. In retrospect some 35 years later - they still are.
LP: 1984 Start
CD: 1995 Gong
The CD has 2 bonus tracks, that sound a bit more modern than the album proper.