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The concept of LISA (Laser Interferometer Space Antenna), a space-based gravitational wave detector, has been studied jointly by the European and US space agencies ESA and NASA for 20 years. Due to shortage of money on the NASA side, currently ESA is studying a variant of the original LISA concept, called eLISA (or sometimes NGO), that ESA could afford on its own, should NASA not be able to come up with a financial contribution.

LISA website (ESA)

LISA website (NASA)


  • Laser Interferometer Space Antenna