![]() This was later confirmed during a solar eclipse when a star's position was measured before, during and after the eclipse. Gravity LensĮinstein's General Theory of Relativity predicted that gravity could bend space. Such a huge mass for a disk might indicate that a black hole is present within the disk. The disk is about the size of our solar system, but weighs 1.2 billion times as much as the sun. You then estimate the mass of the black hole by looking at the effect it has on the visible object.įor example, in the core of galaxy NGC 4261, there is a brown, spiral-shaped disk that is rotating. For example, if a visible star or disk of gas has a "wobbling" motion or spinning AND there is not a visible reason for this motion AND the invisible reason has an effect that appears to be caused by an object with a mass greater than three solar masses (too big to be a neutron star), then it is possible that a black hole is causing the motion. What you look for is a star or a disk of gas that is behaving as though there were a large mass nearby. The radius of the event horizon is called the Schwarzschild radius, named after astronomer Karl Schwarzschild, whose work led to the theory of black holes. Once inside the event horizon, all "events" (points in space-time) stop, and nothing (even light) can escape. ![]() Once something passes the event horizon, it is gone for good. You can think of the event horizon as the mouth of the black hole. The opening of the hole is called the event horizon. The core becomes the central part of the black hole called the singularity. Because the core's gravity is so strong, the core sinks through the fabric of space-time, creating a hole in space-time - this is why the object is called a black hole. This object is now a black hole and literally disappears from view. The core's gravity is so strong that even light cannot escape. What remains is the highly compressed, and extremely massive,core. As the core compresses, it heats up and eventually creates a supernova explosion in which the material and radiation blasts out into space. At the same time, the star's gravity pulls material inward and compresses the core. We cultivate excellence, deliver value, enhance education, and engage the public.As the star dies, the nuclear fusion reactions stop because the fuel for these reactions gets burned up. The National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 "to promote the progress of science to advance the national health, prosperity, and welfare to secure the national defense."ĪUI collaborates with the scientific community and research sponsors to plan, build, and operate cutting-edge facilities. NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media. Observing time on NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Operated under cooperative agreement by Associated Universities, Inc.įounded in 1956, the NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. The National Radio Astronomy Observatory is a facility of the National Science Foundation As you can probably imagine, it is very hard to obtain measurements of black holes that we can use to better constrain these theories, making them rather open to interpretation. Your last suggestion is the one most consistent with what theorists believe is the structure inside a black hole. If all matter at the beginning was in one infinitely small point so incredibly charged with energy would that weight punch through space creating a hole in the universe thus creating the first black hole perhaps the backlash of the initial tearing of space created such an explosion that the matter known and still unknown is the blowback from such an immense explosion? Also does a black hole act like a tunnel through space or the inbetween space dumping its matter out in nonspace slowly filling the nonspace with matter or does it tear through another location in space erupting the energy into space thus recycling the the energy? Or is a black hole an infinitely deep pit in the space as we know it and just continuously sucking in all matter and energy? - SeanĪnswer: Based on current accepted theory of the structure of black holes all we can say is that matter eventually falls onto the singularity, or point where the gravitational force is infinite, and is therefore compressed to a single point. Question: So a question from the uneducated.
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