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