Yes, gravity can form waves known as gravitational waves. Gravitational waves are ripples in the fabric of spacetime that propagate outward from sources with changing gravitational fields. They were first predicted by Albert Einstein in his general theory of relativity.
Gravitational waves are produced by extremely energetic events in the universe, such as the collision of black holes, the merging of neutron stars, or the early moments of the Big Bang. These events cause disturbances in the curvature of spacetime, which propagate outward as waves at the speed of light.
Gravitational waves are different from other types of waves, such as electromagnetic waves or sound waves, because they do not require a medium to propagate through. They can travel through the vacuum of space, unaffected by intervening matter.
The detection of gravitational waves has opened up a new window to observe and study the universe. In 2015, the Laser Interferometer Gravitational-Wave Observatory (LIGO) made the groundbreaking first direct detection of gravitational waves, confirming Einstein's predictions and ushering in the era of gravitational wave astronomy. Since then, several more detections have been made, providing valuable insights into the nature of black holes, neutron stars, and the dynamics of the cosmos.