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Martin Gehler, LISA Study Manager at the European Space Agency, adds, "The review was a major success for all stakeholders and the fruit of vigorous work on [the] Consortium, NASA, and ESA side over the last years."
Through observations of gravitational waves, LISA will offer an unprecedented and unique view of the universe, quite different from any other space telescope and any ground-based gravitational-wave detector. LISA will deliver pioneering scientific results enabling insights not available through electromagnetic observations. Combining LISA observations with those of other ground- and space-based facilities will also allow scientists to make enormous advances in multi-messenger astronomy.
The LISA instrument will consist of three spacecraft in a triangular configuration with 2.5 million kilometer arms, moving in an Earth-like orbit around the sun. Gravitational waves from sources throughout the universe will produce slight oscillations in the arm lengths (smaller than the diameter of an atom). LISA will capture these motions and thus measure the gravitational waves by using laser links to monitor the displacements of test masses free-falling inside the spacecraft. The LISA satellites are being built by ESA, ESA member nations, and NASA.
LISA´s hardware has had its first and very successful test in space with the LISA Pathfinder (LPF) mission, led by ESA with NASA participation. This included a thorough test of crucial components of LISA´s technology. LPF demonstrated that it's possible to place and maintain test masses in free-fall to an astonishing level of precision, and that the exquisite metrology needed for LISA meets the requirements.
LISA will observe gravitational waves in a lower frequency band than those detectable by LIGO and Virgo, allowing us to observe much larger systems at earlier times in the universe's history.
The LISA Consortium is a large international collaboration that combines the resources and expertise from scientists in many countries all over the world. Together with ESA as the lead agency and NASA as an international partner, the LISA Consortium is working to bring the LISA mission to fruition.
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