Philosophy: What exactly is a black hole? Naftali Hirschl, PhD. StrategyInnovation 15.02.201916.12.2021 2 Minutes A black hole is conventionally thought of as an astronomical object that irrevocably consumes all matter and radiation which comes within its sphere of influence. Physically, a black hole is defined by the presence of a singularity, i.e., a... Please register here, or login below. Username or E-mail Password Remember Me Forgot Password Published by Naftali Hirschl, PhD. View all posts by Naftali Hirschl, PhD. Published 15.02.201916.12.2021