The Most TERRIFYING Types of Black Holes

Stellar. A stellar black hole forms when a massive star, typically at least around 8 to 20 times the mass of the sun, reaches the end of its life and runs out of fuel. As the star can no longer generate enough energy to resist its own gravity, its core collapses, leaving behind a black hole. A black hole produces no light of its own, which means an isolated stellar black hole can be virtually invisible against the darkness of space. Unless it is actively feeding on nearby gas or As you approach a stellar black hole, its gravity becomes dramatically stronger that it can literally tear you apart, stretching your body lengthwise in a process known as spaghettification. Then there's the event horizon, which is the invisible boundary surrounding the black hole that marks the ultimate point of no return. Once you cross it, you will never be able to escape it. Intermediate. Intermediate black holes are black holes that fall between stellar mass black holes and supermassive black holes in size. They are thought to range from around 100 to 100,000 times the mass of the sun. But despite having an enormous mass, an intermediate black hole could still be only a few thousand kilometers across. And that enormous concentration of mass comes with an equally powerful gravitational pull. In fact, if one passed close enough to our solar system, its immense gravity could disrupt the orbits of planets, potentially throwing them into completely different trajectories. Even more unsettling is that, like the stellar black hole, an isolated intermediate black hole could be almost completely invisible if it isn't feeding on surrounding matter. But despite how mysterious they are, studying these black holes could help scientists uncover one of the biggest mysteries in astronomy, how the first black holes grew into the supermassive monsters that now dominate the centers of galaxies. Supermassive. Supermassive black holes are enormous black holes found at the centers of most large galaxies with masses ranging from millions to billions of times that of the sun. Unlike stellar black holes, which typically form from the collapse of massive stars, supermassive black holes are thought to grow over billions of years by consuming gas, dust, stars, and merging with other black holes. Our own galaxy, the Milky Way, is no exception. At its center lies Sagittarius A, a supermassive black hole with a mass roughly four million times that of the sun. We have even managed to capture images of their shadows. For instance, in 2019, the Event Horizon Telescope collaboration released the first ever image of a black hole, revealing the shadow of the supermassive black hole at the center of the galaxy Messier 87. Despite their terrifying nature, supermassive black holes play an important role in the formation and evolution of galaxies. Binary. A binary black hole is a system of two black holes that orbit around each other. They form when two massive stars are born as a binary system, and both eventually collapse into black holes. Over time, the two black holes slowly move closer together as they lose their orbital energy, after which they collide and merge into one larger black hole and release enormous amounts of energy in the form of gravitational waves, which are ripples in spacetime that travel outward at the speed of light. The merger happens incredibly quickly, and the gravitational waves can travel an incredibly long distance across the universe. Now, in 2015, scientists made history when LIGO detected GW150914, the first detection of gravitational waves from a binary black hole. The signal came from two black holes roughly 36 and 29 times the mass of the sun, spiraling toward each other and eventually merging into a single, more massive black hole. Rogue. A rogue black hole is a black hole that travels through space without orbiting a star or being anchored at the center of a galaxy. Instead, it wanders silently through the endless darkness of space, alone, invisible, and almost impossible to find. These mysterious objects form when a massive star explodes unevenly, giving the newly formed black hole a kick strong enough to send it away through space. It can also form when black holes interact with massive objects such as stars or other black holes, which can fling them out into the void. And when that happens, it is cast into the darkness, drifting with no star to orbit and no galaxy to call home. Rogue black holes are also extremely difficult to detect because, like most black holes, they don't produce any light of their own. To see them, astronomers look for the effects of their gravity, such as when it passes in front of a star and bends its light, in a phenomenon known as gravitational microlensing. Now, there could be millions of rogue black holes wandering through our Milky Way alone, but fortunately, space is enormous, so it is extremely unlikely that one would ever come close enough to Earth to pose a threat. Primordial black holes are hypothetical black holes that may have formed shortly after the Big Bang, rather than from the collapse of massive stars. In the early universe, when it was extremely hot and dense, tiny regions with unusually high concentrations of matter could have collapsed under their own gravity to form primordial black holes. Unlike normal black holes, which are typically several times more massive than the Sun, primordial black holes could have formed with a wide range of masses, from extremely small ones to thousands or even millions of times the mass of the Sun. Now, scientists are interested in them because they could potentially help explain dark matter, which is the mysterious substance thought to make up a large part of the universe. They could also give us valuable clues about what the universe was like when it was very young. Very small primordial black holes may have disappeared over time because of a process called Hawking radiation, but the larger ones could still exist today. However, no primordial black hole has been confirmed yet, and scientists are still searching for evidence that they exist. Quantum black holes are hypothetical black holes that are so small that the rules of quantum mechanics become important in describing their behavior. Unlike ordinary black holes, which can largely be explained using Einstein's theory of general relativity, quantum black holes would require a theory of quantum gravity that combines gravity with the laws of quantum physics to understand them. These black holes could be incredibly small, possibly smaller than an atom by an enormous amount, even potentially approaching the Planck length, which is around 1.6 times 10 to the minus 35 meters. To put that into perspective, a proton is about 10 to the power of 20 times larger than the Planck length. At this incredibly small scale, the normal rules of gravity and quantum physics interact in unusual ways, and space and time themselves may no longer behave normally. Quantum black holes are not yet confirmed to exist, but studying them could help scientists understand how gravity and quantum physics work together, and reveal more about how the universe itself works. White Hole A white hole is a hypothetical object in space that is essentially the opposite of a black hole. Instead of pulling matter and light in, a white hole would only allow matter and energy to come out, while preventing anything from entering. If one existed, it could release enormous amounts of matter and energy, making it extremely bright. So why do scientists talk about white holes? Well, for one, they can appear in the mathematics of Einstein's theory of general relativity as a time-reversed version of a black hole. In simple terms, you can think of a white hole as a black hole running backward in time, where instead of matter falling in, matter comes out. Some theories also suggest that a white hole could be connected to a black hole through a wormhole, while other theories propose that a black hole could eventually turn into a white hole after an extremely long time because of quantum effects. However, white holes remain purely theoretical, and scientists have never observed one or found any evidence that they actually exist.