New research suggests that if wormholes really exist, they can swallow black holes. Astronomers believe that they may have detected a black hole falling into a wormhole using ripples in space-time called gravitational waves, but only if the wormhole does exist and the event that the wormhole swallows the black hole may have occurred. Einstein predicted the existence of gravitational waves for the first time in 1916. According to his view, gravity is generated when the mass distorts space-time. When two or more celestial bodies move in one gravitational wave, gravitational waves propagating at the speed of light will be generated, stretching and squeezing space-time in the process of motion. < / P > < p > because gravitational waves are very weak, they are difficult to detect, and even Einstein is not sure if they really exist and whether they can be found. After decades of research by scientists, in 2016, scientists reported that the first direct evidence of the existence of gravitational waves was detected by the laser interference gravitational wave observatory (LIGO). At present, the gravitational wave observatory has detected more than 20 large-scale collision events, such as collisions between super dense and massive objects such as black holes and neutron stars. However, in theory, there may be more exotic objects, such as wormholes. Wormhole collisions can also produce gravitational signals that scientists can detect. Wormholes are tunnels in space-time. Theoretically, wormholes can travel in any region of space-time or even enter another universe. Einstein’s general relativity allows wormholes to exist, although whether they exist is another matter. < / P > < p > in principle, all wormholes are unstable and will close as soon as they are opened. The only way to keep the wormhole open and walkable is to take strange forms of so-called “negative mass” matter, which has unique properties, including flying away from a standard gravitational field, rather than falling towards it like ordinary matter. In fact, no one really knows whether these strange substances exist. < / P > < p > in many ways wormholes are similar to black holes, both of which are very dense and have strong gravity. The main difference between the two is that theoretically, no matter can return to the wormhole after entering the black hole. The gravity of the black hole exceeds the critical speed of light, and any object entering the wormhole can theoretically move in reverse direction. < / P > < p > assuming that wormholes may exist, scientists have studied the gravitational signals generated by black holes running around wormholes, and published a paper report to explore and analyze what happens when black holes enter wormholes? Leave the other end of the wormhole and enter the other end of time and space? Suppose that a black hole and a wormhole are gravitationally bound together. The black hole falls into the wormhole and then appears at the other end of the wormhole. < / P > < p > in a computer model, researchers analyzed the interaction between a black hole with a mass of 5 times the mass of the sun and a wormhole with a mass of 200 times the mass of the sun. The diameter of the entrance of the wormhole is 60 times the diameter of the black hole, and the black hole can stably pass through the wormhole. Finally, the simulation results show that there will be gravitational signals that have not been detected before when the black hole enters and leaves the wormhole. < / P > < p > when two black holes spiral close to each other, their orbital velocity increases, just as a figure skater tightens his arms toward the inside of his body as he spins his body on the ice. On the contrary, the frequency of gravitational waves increases. Gravitational waves produce sounds similar to bird calls, like someone whistling quickly, because any increase in frequency corresponds to that increase in pitch. < / P > < p > if you observe a black hole spiral into the wormhole, you will hear a birdsong chirp, like two black holes colliding together, but the gravitational wave from the black hole decays rapidly because it radiates most of the gravitational wave to the other end of the wormhole. On the contrary, when two black holes collide, the result is a huge explosion of gravitational waves. < / P > < p > if you see a black hole emerging from the wormhole, you will find an “anti chirp”. Specifically, when the black hole is far away from the wormhole, the gravitational wave frequency will decrease. As the black hole continues to enter and exit each port of the wormhole, a cycle of chirp and anti chirp will be generated. The length of time between each chirp and an anti chirp shrinks over time until the black hole gets stuck somewhere in the wormhole. If we can detect this gravitational signal, we can prove the existence of wormholes. “Although wormholes are highly speculative, we have the ability to prove or at least provide some credibility for their existence,” said William gabella, a physicist at Vanderbilt University and co-author of the study < / P > < p > in this case, the black hole will eventually stop falling into and leaving the wormhole and stay near the “throat” of the black hole. The final outcome depends on the putative nature of the strange material found in the wormhole throat. One possibility is that the black hole effectively increases the mass of the wormhole, and the wormhole may not have enough foreign matter to keep stable, gebera said. “Maybe the resulting space-time chaos will cause the black hole to convert its mass into energy in the form of massive gravitational waves.” Gebera said: “as long as the wormhole mass is greater than any black hole it encounters, it will remain stable. If the wormhole encounters a larger black hole, the black hole may destroy the foreign matter in the wormhole, which can completely make the wormhole unstable, even cause the wormhole to collapse, and may form a new black hole.” < / P > < p > If a black hole only cuts off the edge of the wormhole, some black holes enter the wormhole port, and the rest stay outside the wormhole, what will happen at this time is still uncertain. “I suspect that there are some crazy phenomena in the event horizon of black holes, which lead to more gravitational waves and energy loss. Such collisions may destroy the foreign matter in the wormhole and cause instability in the wormhole,” Gabriella said < / P > < p > future research can explore the interaction between foreign matter and normal matter in wormholes, as well as more complex situations, such as what happens when wormholes rotate. Other research directions could analyze how gravitational waves interact with normal and exotic matter in these situations, as well as possible changes in the orbits of wormholes and possible celestial bodies, gebera said. (Ye Qingcheng)= target=_ blank>Apple extends AppleCare + purchase period: users can decide within 60 days