————————– THE BLACK HOLE Theories ————————–
“As the Universe’s largest black hole, it would hold the imprint of an entire universe stretching almost infinite distances into the distant past. It would also have been endowed with the same amount of mass as our sun! “The existence of a vast black hole would have required a cosmic event many orders of magnitude greater than the Big Bang. A few minutes to millions of years later and all that structure would have vanished, leaving the surface of a rapidly expanding bubble where the black hole could gradually fill in over time and create the present Universe. But what would become of the matter of this massive, chaotic system? What might it do to create all the life on Earth? This would be the largest black hole ever, and the most powerful - the black hole would be able to destroy all life on Earth.” http://www.nature.com/srep/2013/120411/srep01078.html
“Black holes can be very damaging objects: their gravitational influence, if not quite powerful enough, can destroy the universe, and they are huge. However, as all black holes we know exist (except for the one in our own solar system) are really black holes, so they can be very difficult to detect (for the same reason it is very hard to see anything in a black hole). The last time we saw one of these was in 2008, when one took a huge chunk, known as LIGO-Virgo, from the sky and was observed for a few seconds. A year on and it is still very hard to see anything on LIGO-Virgo, but the fact that it continues to be visible and that there has always been some detectable signal from it suggests that our knowledge and technology are improving, and that there is a future for astronomers to study black holes.” http://www.sciencedaily.com/releases/2006/09/2006091603164.htm
“It is widely thought that the giant black hole thought to be at the centre of the Milky Way galaxy harbors a mass of about 100 times that found in the nearby supermassive black hole at the centre of our own galaxy.” http://www.bbc.co.uk/news/science-environment-12270073
To begin an explanation of the black hole concept -
In 1919, the Swiss physicist Rudolf Busemann realised that the universe had a ‘cosmic nucleus’. Busemann said this would be at the centre of large galaxies, and it would be a point where the material which makes up the galaxy’s structure also made up its size. This nucleus, Busemann concluded, was ‘like a black hole’. He named it a black hole and it has been identified for billions of years as the source of most of light and energy in the universe. Theoretically it can no longer be located. However, the very process of looking for it is what scientists call cosmic probing. It is an exercise in finding out whether or not an object that normally would be invisible would be a black hole. It takes a lot of effort and persistence, and a lot of experience knowing that the information is out there and very exciting. Busemann showed that it actually took less energy to throw a neutron, which the physicists call a particle of dark energy, than a proton which is called a particle of light. Since there were only a few trillion neutrinos in the Universe, this shows that it can now be found - something that is very exciting and exciting to a lot of researchers. The black holes also require very powerful telescopes, as their effects are so magnified. In addition, they need to be in a special place or conditions. This is the best way to find a black hole.
The biggest ever experiment in astronomy is searching for the supermassive black hole at the centre of a galaxy called Sagittarius A* (Sag, for short). Black holes are the extreme ends of a very large spectrum of stars, where not even light can escape. A supermassive black hole is 1 million times smaller than an ordinary black hole. It eats up any energy in the star’s core and causes it to cool down to near absolute zero. Although the temperature and pressure of the supermassive black hole could cause fusion reactions to break out, they are unlikely. Instead the black hole probably emits the energy.
Many scientists believed that the best place for the black hole to be is in our own galaxy. This is because they believed that it would not be able to escape from its own gravity. This view is based on mathematical modelling that says a small, but still significant amount of energy must be released, similar to the way that a car will stall on a busy road when it loses all traction.
However, all of this does not seem true in practice. Observations from the Large Synoptic Survey Telescope on Mount Wilson in California are showing evidence for mass loss in the black hole. They have identified a