What happens if two black holes were to collide with each other?

It is possible for two black holes to collide. Once they come so close that they cannot escape each other’s gravity, they will merge to become one bigger black hole. Such an event would be extremely violent. These ripples are called gravitational waves.

Why can’t an outside observer watch something cross the event horizon?

Several theories were subsequently developed, some with, and some without, event horizons. Any object that approaches the horizon from the observer’s side appears to slow down and never quite crosses the horizon. Due to gravitational redshift, its image reddens over time as the object moves away from the observer.

What would an observer see if someone fell into a black hole?

An observer watching someone falling into a black hole sees them slow down and redshift until they completely stop at the event horizon. The complete Schwarzschild geometry consists of a black hole and a white hole.

Can we observe black holes colliding?

Scientists have detected two collisions between a neutron star and a black hole in the space of 10 days. Researchers predicted that such collisions would occur, but did not know how often. The observations could mean that some ideas of how stars and galaxies form may need to be revised.

Why would an outside observer never see you fall into a black hole?

The event horizon is what, in relativity parlance, is called a “lightlike surface”; light rays can remain there. You’ll never see me actually get to the event horizon. My watch, to you, will tick more and more slowly, but will never reach the time that I see as I fall into the black hole.

What was Einstein’s view on gravity?

GETTING A GRIP ON GRAVITY Einstein’s general theory of relativity explains gravity as a distortion of space (or more precisely, spacetime) caused by the presence of matter or energy. A massive object generates a gravitational field by warping the geometry of the surrounding spacetime.