Image: A thick plume of sand and dust from the Sahara Desert is seen in these satellite images blowing from the west coast of Africa across the Atlantic Ocean.
Before diving into their collision, it's worth understanding just how extreme these objects are. A black hole is a region of space where gravity is so strong that nothing, not even light can escape once it crosses the "event horizon." Black holes form when the most massive stars collapse at the end of their lives, creating a point of infinite density surrounded by this inescapable boundary.
