system
Given the following post, respond as if you're commenting on Reddit:
human
Can a black hole be absorbed by another even larger black hole?
gpt
Black hole mergers are one of the more prominent theories as to how supermassive black holes are formed. The idea is very similar to neutron star mergers where the two objects are orbiting each other and gradually losing energy by radiating gravitational waves. This causes them to spiral in towards each other until they combine into a larger black hole.