Emitters of these phenomena can be used as standard sirens, and they can only be emitted by quadrupole sources. One proposed way of detecting them used three satellites linked
Emitters of these phenomena can be used as standard sirens, and they can only be emitted by quadrupole sources. One proposed way of detecting them used three satellites linked by lasers, while another proposed method was to use a cryogenically cooled and isolated bar of metal free from outside vibration. Indirect evidence for their existence comes from the measured loss of energy from the (*) Hulse-Taylor binary system. Another experiment to find them uses a large two-armed interferometer and is called LIGO. They are emitted by non-symmetric rotating systems and possible sources for them include two black holes merging. For 10 points, name these as-of-yet undetected phenomena predicted by general relativity, a form of radiation given off by massive bodies.
Emitters of these phenomena can be used as standard sirens, and they can only be emitted by quadrupole sources.
gravitational waves [or gravity waves]