Astrophysicists believe black hole mergers should provide
the strongest gravitational waves.
«Gravitational waves from merging supermassive black holes will be spotted within 10 years: Survey of fast - spinning pulsar stars offers better estimate of when astronomers will first detect
the strongest gravitational waves in the universe, which dwarf those previously detected from black hole mergers.»
The newly merged black hole then recoils in the opposite direction of
the strongest gravitational waves and shoots off like a rocket.
Most inflationary models require that, as you look at larger and larger scales of the universe, you should see stronger and
stronger gravitational waves.
The strong gravitational waves from such collisions might be detectable by a proposed NASA mission.