LISA Satellites

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© JPL/NASA.

The Laser Interferometer Space Antenna, or LISA, will consist of three satellites separated by 5 million kilometers. Laser light will be sent between the satellites to detect the expansion and compression of space, which is the signature of a passing gravitational wave. LISA will be able to detect low-frequency gravitational waves from sources such as massive black hole binaries and stars spiraling into black holes that are nearly impossible to detect from the ground. (Unit: 3)