How far can a black hole suck

So objects that do not keep a safe distance get swallowed. Despite their reputation, black holes will not actually suck in objects from large distances. Black holes can be surrounded by rings of gas and dust called accretion disks. a safe distance from black holes at all times. They don't suck in all. How far would a star have to collapse before it "disappeared" from the visible universe? Astronomers refer to that critical size as the "event horizon" .

 · With the third observing run now complete, the number of black hole-black hole mergers seen has increased from about a dozen to more than Sagittarius A*, at the center of the Milky Way, is the. The ISCO is more or less the distance at which black hole starts “sucking” objects without engines. It’s not literal sucking, just e.g. accretion disks can’t exist below that distance. The photon sphere is the blac Continue with Quora+ Unlock this answer and browse ad‑free by joining Quora+ Start free trial Learn more views Chris Becke. Jerry: You can't see a black hole directly, but if a black hole is in a binary star system, it can be seen with binoculars, an optical telescope, or an x-ray telescope above the Earth's atmosphere. (Moderator, Jason): We're working to get through all of the great questions you've asked us.

The fact of the matter is that black holes aren't sucking anything in; there's no force that a black hole exerts that a normal object (like a moon, planet, or star) doesn't exert. In the end, it's. Answer (1 of 7): Yuya, all depending on what definition of a black hole you prefer, the speed of objects getting “sucked” in will approach C the closer they get to the Schwarzschild radius en will even get closer to C when they approach the physical black hole. The event horizon of a black hole is the invisible line-in-the-sand across which you can never return. Once anything passes through the event horizon, even light itself, it can no longer return to.

Streams of gas fall to their dooms, plunging into black holes, locked away from the universe forever. In their final moments, these gassy shreds send out one last flare of light, some of the brightest emissions in the universe. These death dives are too far away to be seen directly, but astronomers have devised a new technique for detecting their panicked cries for help. They're using the method to test our knowledge of gravity in the most extreme environments in the universe. In a new study, physicists looked at specific features of that light to figure out the closest you can get to a black hole without having to work hard to prevent disaster — a threshold called the innermost stable circular orbit or ISCO.