Gravitational Waves : Ripples In Space - Time

Gravitational waves are invisible ripples in the fabric of space - time . They are caused by some of the most violent and energetic events in the universe .

These include colliding black holes , collapsing stellar cores , merging neutron stars or white dwarf stars , the wobble of neutron stars that are not perfect spheres and possibly even the remnants of gravitational radiation created by the birth of the universe .

In this video , Dr. Padi Boyd explains gravitational waves and how important Hubble is to exploring the mysteries of the universe .