SOLARIS

1995 - Solaris The Last Corridor 2CD - 19.57
2002 - Not Of This Earth 3CD/4LP - 7.25

SOLARIS 4/A

1996 - Esplorazione Degli Spazi Interstellari Mediante Apparecchi A Reazione MC - 7.25
2009 - Odyssey Europa 4CD - 7.26

SOLARIS IV/A

1995 - Solaris The Last Corridor CD/2CD - 7.25
1996 - Esplorazione Degli Spazi Interstellari Mediante Apparecchi A Reazione MC - 7.25
1998 - The Ice Curtain 2CD - 7.26

SOLARIS (T.A.C. EXTENDED MIX)

2003 - Triumph Des Todes CD - 3.45

Solaris is a very long version.
Solaris 4/A and IV/A were released in the same version in all the records/samplers and was named simply Solaris on Not Of This Earth sampler.
Solaris (T.A.C. Extended Mix) is a remix.