The Role of Black Holes in the centers of Galaxies Essay

The Role of Black Holes in the centers of Galaxies - Essay Example In the Milky Way, the supermassive black hole is known as Sagitarrius A*, which is read as â€Å"A-star† (Naeye & Gutro, 2008). Sagitarrius A* is known to be â€Å"27,000 light years from the Earth [and] is four million times bigger than the Sun† (Ghosh, 2012). However, NASA reports Sagitarrius A* to be 26,000 light years away from the Earth, and not 27,000 (â€Å"A Mystery,† 2002). In fact, the existence of black holes has long been theorized by British astronomer Sir Martin Rees in 1974 and, according to him, â€Å"Supermassive black holes [or] ones with a million or even a billion solar masses might exist within the centers of some galaxies† (â€Å"A Mystery,† 2002). According to Durham University astrophysicist Ian Small, â€Å"The black holes [that we studied] are seen precisely at the point where they can have the most influence on the properties of the galaxies they reside in† (qtd. In Lovgren, 2005). This means that if the supermassiv e black holes are located at other points in the galaxy except the center, then it cannot exert equal influence on all parts of the galaxy. In short, for it to exert an almost equal gravitational force on every part of the galaxy, then it has to be at its center. The same principle works if the supermassive black hole is to release energy towards every part of the galaxy it is in, but this release of energy is merely hypothetical. According to Professor Richard Genzel of the Max Planck Institute for Extraterrestrial Physics, â€Å"The center of the galaxy was a â€Å"unique laboratory for the study of the strong gravity, stellar dynamics and star formation with a level of detail ‘never possible beyond our galaxy’† (qtd. in â€Å"Black hole,† 2008). This means that there must be one good reason for the supermassive black hole to eventually reside in the galactic center other than position. Genzel’s hypothesis is therefore the possibility that the ph ysics of the center of the galaxy is unusually different from the rest of its parts. Perhaps then there is a much stronger gravitational attraction as well as different principles of stellar dynamics and star formation towards the galactic center. Furthermore, according to Cain, the center of the galaxy, where the supermassive black holes reside, serves as the place where â€Å"every galaxy serves to focus and concentrate material as the galaxy was first forming† and it is also possible that this is the same exact point â€Å"where the black hole formed first, and collected the rest of the galaxy around it† (Cain, 2008). The aforementioned statement means that the possible origin of the galaxy may in fact be the exact point where the supermassive black hole is located and perhaps the galaxy still continues to grow from that central point. The implication of this theory is that, if it is true, then much constructive material is located in the black hole and that the gal axy is in fact never growing old and its parts constantly being replaced by these materials from the black hole. Another observation of Lovgren (2005) is that, according to scientists, â€Å"pairs of galaxies – and their black holes often merge together [thus producing] tidal forces [that] drive a lot of gas toward the center of the

The Meaning of Learning to Write Essay Example | Topics and Well Written Essays - 750 words - 1

The Meaning of Learning to Write - Essay Example Gradually I have become accustomed to noting down stories or encounters I suppose are worth my precious whiles and record, taking plenty of concrete and accurate details into account. In the process, I have felt a significant degree of improvement as I proceed writing with the spontaneous fluidity of thoughts. Since I typically make it a point to use a thesaurus and acquire constant engagement in reading literature, I keep discovering ways to write in a more creative manner. With an increased level of creativity and enriched vocabulary, I observe being capable of effective self-expression when conveying sentiments and ideas through writing. Such joy and fascination lead me to establish writing as a hobby or a form of diversion by which to escape into a world of wonders and possibilities yet unknown. To an extent, it has even brought me to find delight in composing essays and poems I savor reading as well. Currently, however, due to rapid growth in the field of information technology where further developments have continuously led to the expansion of social networking, I am at this stage of literacy confronted with a new set of challenges in writing. I see that the more I make electronic connections, the more that I gain access to various resources of learning. The diversity of the information obtained enables me to realize both my strong and weak areas in writing. Through the social networking site, for instance, I can often take the opportunity to view literary works by several different authors from whom to determine a certain standard or basis with which to evaluate my compositions and figure how else I may improve on my writing skills at the thought of present demands, trends, and whether former conventions can be made to suit our modern level of thinking and attitude. More exposure to the worldwide web means more insights from people all over the world who can surf the internet and share ideas that reflect the substance of their cultures. This way, I beli eve that there would be other perspectives available by which to equip me with rich knowledge pertaining to the language and literature of other societies or ethnic groups. I recall a friend whose writing style is nearly based on the general manner of her oral speech and there occurs much to be understood about her background just by looking at the narrative structure of her work via the peculiar use of terms and construction of sentences. It may be inferred herein that socio-cultural influences affect a person’s writing approach because then external factors bear an impact on the mind of a writer. In my case, I have had a number of attempts in experiencing techniques by other people and it appears, unless I feel or comprehend their situation, not a single strategy would work considering how our frames of references differ from each other.