The Laser Interferometer Space Antenna mission

The Laser Interferometer Space Antenna (LISA) mission is designed to detect and study low-frequency gravitational radiation. The types of exciting astrophysical sources potentially visible to LISA include extragalactic massive black hole binaries at cosmological distances, binary systems composed of a compact star and a massive black hole, Galactic neutron star-black hole binaries, and background radiation from the Big Bang. LISA will also observe Galactic binary systems which are known to exist.