Prototype beam splitter for the Advanced Laser Interferometer Gravitational Wave Observatory (aLIGO)
2008 (prototype)
2008 (prototype)
1995
1964
1995
1993
1986
1990-1993 (spare); 1995 (original launched)
1964-1978
1964-1978
1964-1978
1964-1978
early 1990s
1986
1986
1986
1995
1978-1980
1964-1978
1992-2007
1979
1979
1992-2007
1964-1978
1972
1964-1978
1995
1964-1978
1995
1982-1984
1984
1953-1968
1992-2007
1970-1985
1984
1995
1992-2007
1992-2007
1992-2007
1986
1992-2007
1973-1974
circa 1999 -circa 2005
1992-2007
1990-1993 (spare); 1995 (original launched)