Explore: Discover the magic of a huge black hole.

<P> Technology Channel (tech.) message: the black hole theory is undoubtedly the most challenging of the century, also said the most exciting one of astronomy. .Astronomers in many countries the world are the secret to uncover the black hole and make unremitting efforts. .Japanese astronomers announced that they are 12.7 billion light years from Earth in the universe able to find a huge black hole. .</ P> <P> Japan Aerospace Exploration Agency (JAXA) recently announced that it successfully through the SUBARU telescope, observed a huge black hole, the black hole of about 12.7 billion light years from Earth, roughly in the direction of Cancer. .The black hole is the 11 Japanese astronomers discovered black holes in the most distant one from Earth, is also the largest one, the size of about 20 billion times the sun. .Japanese astronomers said that according to observations in the universe about 10 billion years after the birth of time, this huge black hole has subsequently born. .According to the current astronomical theory, it is impossible to explain. .</ P> <P> Japanese astronomers that black holes have been in the field of astronomy is very mysterious. .According to general relativity theory, the gravitational field can be made to bend space-time, when the star's size is large, its gravitational field on space-time had little effect on the surface from the star made a point of light can move in any direction along a straight line shot. .The smaller the radius of the star, its surrounding space-time bending to the greater light to certain angles will be issued to return the stellar surface along the curved space. .When the star's radius as small as a specific value (in astronomy called the "Schwarzschild radius"), the even light emitted by the vertical surface will be captured. .At this point, the star becomes a black hole. .That it was "black" means it is like a bottomless pit in the universe, if any substance to fall into, it seems no longer possible to escape. .</ P> <P> on Earth, due to the role of the gravitational field is very small, this bending is minimal. .In the black hole, this distortion of space is very large. .Thus, even if the black hole is blocked off by the light emitted by stars, although some will disappear into a black hole can be adopted by another part of the bending of light around a black hole in space to reach Earth. .Therefore, we can easily observe the black hole on the back of the sky, like a black hole does not exist, this is the black hole of Invisibility. .Even more strange is that some stars are not only light emitted directly toward the Earth to reach the Earth, it is the other direction toward the light emitted near the black hole could be strong gravitational attraction, by refraction reach the Earth. .So that we can not only see the star of the "face", can also see it on the side, or even back. .</ P> <P> Japanese astronomers said, with other bodies in the universe compared to the many characteristics of the black hole is very special. .For example, the black hole has magical "Invisibility", it is almost impossible to directly observe it, even the scientists can only guess it put forward various internal structures. .So, the black hole in the end is how to hide themselves from? .As we all know, the light travels in straight lines, this is a basic common sense. .However, according to general relativity theory, space is curved under the action of the gravitational field. .At this time, the light while still along the shortest distance between any two points spread, but the walk is not linear, but curves. .Figuratively speaking, if light could have been to go straight, but a strong gravitational pull it deviated from the original direction. .In general, astronomers will be a black hole into two categories: star-star black holes and supermassive black holes. .Star-black hole mass is equivalent to a few of the sun by the collapse to form stars, and supermassive black hole mass star is up to billions of solar masses. .</ P> <P> black hole there is another even more amazing features, that is, close to the speed of light can suddenly erupt. .Although there has been a long time that the magnetic field in the process played an important role, but the first time, scientists have simulated a magnetic field emitted by the accretion of gas, resulting in the specific process of eruption. .Perhaps the computer simulation of the group's most striking result is that the rotating magnetic field near the black hole accretion disks in black holes and the distance between the spinning of the material play a connecting role, just like a car actuators, prison .firmly connected to the rotary engine and its the same axle. .If the birth of a black hole rotating quickly, it means it's "locomotive" very strong, and it captured a large number of substances, will gradually reduce its rotation speed. .Accretion of these huge number of things the last will take over the whole process, the black hole rotation speed limit within a limit. .</ P> <P> Japanese astronomers have also discovered that when spread to a point after the black hole will stop growing. .The biggest black hole is at least 1 million times the mass of the sun, they are early in the formation of planets around devouring greed, ever expanding, after devouring gas and dust, to continue to grow. .But almost all of these black holes are billions of years ago ran out of "food" and therefore can not continue to expand. .In addition, the growth of black holes and the birth of stars there is close contact. .</ P> </ p>.