Explore the Large Magellanic Cloud

The Large Magellanic Cloud is a satellite galaxy of the Milky Way. It lies some 168,000 light-years away from us in the direction of the southern hemisphere constellations Dorado and Mensa. There is no one discoverer listed for the LMC (as its called), or its nearby neighbor, the Small Magellanic Cloud (SMC). Thats because they are easily visible to the naked eye and have been known to skygazers throughout human history. Their scientific value to the astronomical community is immense: watching what happens in the Large and Small Magellanic Clouds offers rich clues to understanding how galaxies that are interacting change over time. These are relatively close to the Milky Way, cosmically speaking, so they offer detailed information about the origins and evolutions of stars, nebulae, and galaxies.   Key Takeaways: Large Magellanic Cloud The Large Magellanic Cloud is a satellite galaxy of the Milky Way, located some 168,000 light-years from our galaxy.Both the Small Magellanic Cloud and the Large Magellanic Cloud are visible to the naked eye from southern hemisphere locations.The LMC and SMC have interacted in the past and will collide in the future. What Is the LMC? Technically, astronomers call the LMC a Magellanic spiral type galaxy. This is because, while it looks somewhat irregular, it does have a spiral bar, and it was very likely a smaller dwarf spiral galaxy in the past. Something happened to disrupt its shape. Astronomers think it was probably a collision or some interaction with the Small Magellanic Cloud. It has the mass of about 10 billion stars and stretches across 14,000 light-years of space. A portion of the Large Magellanic Cloud showing its many clusters and gas and dust lanes set against a nebula backdrop.   NASA/ESA Hubble Space Telescope The name for both the Large and Small Magellanic Clouds comes from the explorer Ferdinand Magellan. He sighted the LMC during his voyages and wrote about it in his logs. However, they were charted long before Magellans time, most likely by astronomers in the Middle East. There are also records of its sighting in the years before Magellans voyages by various explorers, including Vespucci.   The Science of the LMC The Large Magellanic Cloud is filled with different celestial objects. Its a very busy site for star formation and has many protostellar systems. One of its largest starbirth complexes is called the Tarantula Nebula (due to its spidery shape). There are hundreds of planetary nebulae (which form when stars like the Sun die), as well as star clusters, dozens of globular clusters, and countless massive stars.   Astronomers have identified a large central bar of gas and stars stretching across the width of the Large Magellanic Cloud. It seems to be a rather misshapen bar, with warped ends, likely due to the gravitational pull of the Small Magellanic cloud as the two interacted in the past. For many years, the LMC was classified as an irregular galaxy, but recent observations have identified its bar. Until relatively recently, scientists suspected that the LMC, SMC, and Milky Way would collide sometime in the distant future. New observations show that the orbit of the LMC around the Milky Way is too fast, and it may not ever collide with our galaxy. However, they could pass close together, the combined gravitational pull of both galaxies, plus the SMC, could further warp the two satellites and change the shape of the Milky Way.   A view of the Large Magellanic Cloud and all its star formation regions (in red). The central bar stretches across the entire galaxy. NASA/ESA/STScI Exciting Events in the LMC The LMC was the site in 1987 of an event called Supernova 1987a. That was the death of a massive star, and today, astronomers are studying an expanding ring of debris moving away from the site of the explosion. In addition to SN 1987a, the cloud is also home to a number of x-ray sources which are likely x-ray binary stars, supernova remnants, pulsars, and x-ray bright disks around black holes. The LMC  is rich with hot, massive stars that will eventually blow up as supernovae and then likely collapse to create neutron stars and more black holes.  Ã‚   The expanding cloud of material spreading out from the site of Supernova 1987a as seen in visible light from Hubble Space Telescope and x-rays from the Chandra X-Ray satellite. NASA/Chandra/Hubble   The Hubble Space Telescope has been used often to study small areas of the clouds in high detail. It has returned some very high-resolution images of star clusters, as well as star-forming nebulae and other objects. In one study, the telescope was able to peer deep into the heart of a globular cluster to discern individual stars. The centers of these tightly packed clusters are often so crowded that its nearly impossible to make out individual stars. Hubble has enough power to do that and reveal details about the characteristics of individual stars inside the cluster cores.   Hubble Space Telescope looked at the globular cluster NGC 1854 in the Large Magellanic Cloud. It was able to see individual stars at the heart of the cluster. NASA/ESA/STScI   HST is not the only telescope studying the LMC. Ground-based telescopes with large mirrors, such as the Gemini Observatory and Keck observatories, can now make out details inside the galaxy.   Astronomers have also known for quite some time that there is a bridge of gas that connects both the LMC and the SMC. Until recently, however, it wasnt clear why it was there. They now think that the bridge of gas shows that the two galaxies have interacted in the past. This region is also rich in star-forming sites, which is another indicator of galaxy collisions and interactions. As these objects do their cosmic dance with each other, their mutual gravitational pull tugs gas out into long streamers, and shock waves set off spasms of star formation in the gas.   The globular clusters in the LMC are also giving astronomers deeper insights into how their starry members evolve. Like most other stars, the members of globulars are born in clouds of gas and dust. However, for a globular to form, there must be a lot of gas and dust in a relatively small amount of space. As stars are born in this tight-knit nursery, their gravity keeps them close to each other.   At the other ends of their lives (and stars in globulars are very, very old), they die in much the same way other stars do: by losing their outer atmospheres and puffing them off to space. For stars like the Sun, its a gentle puff. For very massive stars, its a catastrophic outburst. Astronomers are quite interested in how stellar evolution affects cluster stars throughout their entire lives.   Finally, astronomers are interested in both the LMC and the SMC because they are likely to collide again in about 2.5 billion years. Because theyve interacted in the past, observers now look for evidence of those past meetings. They can then model what those clouds will do when they do merge again, and how it will look to astronomers in the very distant future.   Charting the Stars of the LMC For many years, the European Southern Observatory in Chile scanned the Large Magellanic Cloud, capturing images of the stars in and around both Magellanic Clouds. Their data were compiled into the MACS, the Magellanic Catalog of Stars.   This catalog is mainly used by professional astronomers. A recent addition is the LMCEXTOBJ, an extended catalog put together in the 2000s. It includes clusters and other objects within the clouds.   Observing the LMC The best view of the LMC is from the southern hemisphere, although it can be glimpsed low on the horizon from some southerly parts of the northern hemisphere. Both the LMC and the SMC look like ordinary clouds in the sky. They are clouds, in a sense: star clouds. They can be scanned with a good telescope, and are favorite objects for astrophotographers.   Sources Administrator, NASA Content. â€Å"Large Magellanic Cloud.† NASA, NASA, 9 Apr. 2015, www.nasa.gov/multimedia/imagegallery/image_feature_2434.html.â€Å"Magellanic Clouds | COSMOS.† Centre for Astrophysics and Supercomputing, astronomy.swin.edu.au/cosmos/M/Magellanic Clouds.Multiwavelength Large Magellanic Cloud - Irregular Galaxy, coolcosmos.ipac.caltech.edu/cosmic_classroom/multiwavelength_astronomy/multiwavelength_museum/lmc.html.

Film Analysis of Dracula by Bram Stoker Essay - 681 Words

Film Analysis of Dracula by Bram Stoker Bram Stoker’s Dracula was filmed and produce in 1992 by Francis Ford Coppola. Based on the infamous vampire novel Dracula in the 1890s. The film stars Gary Oldman as Dracula throughout the film, the hero Harker is played by Keanu Reeves. Winona Ryder play two parts of the film, one is the wife of Dracula the opening sequence and later plays the fiancà ©e of Harker reincarnated. And Anthony Hopkins play the priest of the Christian church of the opening sequence and also does the voice-over for the film. Plot The film starts out in 1462 where Muslim Turks try to invade Transylvania with a massive army. Dracula, before becoming the vampire, is the†¦show more content†¦After the title has faded it is 1892 London, Renfield is shown in a mental institute talking to himself about being rewarded by some dark force. He then eats a cockroach and thanks someone. Jonathon Harker is shown talking his employer about organising a property buyer in Transylvania named Dracula who wish to buy a property in London. Harker asks his employer about what happened to Renfield in Transylvania who also was trying to organise a property for Dracula. The employer replies with family problems. Mina, Harker’s fiancà ©e talks to Harker about getting before Harker’s to Transylvania. But Harker suggests they would marry after his business trip. Representation Dracula – When you see Dracula in the film he is clad in red armour that is shaped like human muscles and tendons, holding a sword in an aggressive pose. Elizabeta – As you see Elizabeta with Dracula she has long flowing curly hair with a tiara in it and wears on white bodice on her dress. This shows innocence and also shows her as a victim a crime of some sort. Her voice is soft gentle and high pitched. After committing suicide the dress she wore is dark and gothic now looking damned. 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Social Media And Democracy - 1665 Words

Social Media and Democracy: From King Street to Wall Street and from classrooms to boardrooms, there is a revolution happening and it is being driven by how we communicate with each other and by the unprecedented rise of what is commonly called â€Å"social media†. (Dictionary.com, 2014) Social Media is the use of dedicated websites and applications to interact with other users, or to find people with similar interests to one s own. (Dictionary.com, 2014) A business, also known as an enterprise or a firm, is an organization involved in the trade of goods, services, or both to consumers. The historic invisible walls of the Internet are being broken down daily, locally and globally. Social media touches nearly every facet of our personal and business lives so it’s imperative for social media to be an integral part of a company’s overall strategy, a business’s overall success will be partly owed to the success of their social media use. Social media will be a business’s customer today, tomorrow, their employees and others. The currency in social media isn’t dollars or euros; it’s meaningful engagement, participation and value that rule a business’s day. The World Wide Web is being categorized by billions of users across the world and if businesses want a say in how they want to be categorized they need to participate with the appropriate currency. (Forbes, 2014) In April 2009 the Ford Motor Company launched an ambitious new marketing campaign called the ford fiesta movementShow MoreRelatedSocial Media And Democracy :1665 Words   |  7 PagesSocial Media and Democracy: From King Street to Wall Street and from classrooms to boardrooms, there is a revolution happening and it is being driven by how we communicate with each other and by the unprecedented rise of what is commonly called â€Å"social media†. 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The Person Who Has Influenced Me Essay Sample free essay sample

I am certain that I can impute some of the positive facets of my life to my older sister Mireya. I was populating in Mexico at my mother’s house with the whole household except my pa. They got split and my pa came to United States to populate. Then were all duties for my oldest sister and my ma. My sister Mireya had a really clear head of what she wanted in life at a really early age. Bing the oldest sister of seven and with an absence of our male parent. taking the control was non an easy undertaking. I admire her difficult work get downing from the age of 16 ; she was an Accounting pupil which is really demanding. She had to work at a full clip occupation while traveling to school. And she had to look over myself and my younger brothers. I truly can see that my sister Mireya was a large influence in my life. We will write a custom essay sample on The Person Who Has Influenced Me Essay Sample or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page and I appreciate her much more now that I am an grownup. Inner harmoniousness. spiritualty and religion. for my household are the declaration of the â€Å"meaning of life† . I remember that every Sunday forenoon. I would acquire ready to travel with her to church. When it came to find what is what is of import in the large image. relationships with brothers and my female parent. became the most of import thing for my older sister. â€Å"When you are listening you are twenty-four hours dreaming† . that is what my oldest sister used to state me. With the absence of my male parent. my sister had to take his function. and spent much of the clip chiding and training us ; because of this we resented her. Discipline was her chief undertaking as the oldest sister. I remember that she left us a list of jobs to take attention of on Saturday forenoon. and so after she came back from work. she wanted everything done that she had asked us to make. She was really rigorous with all of us penalizing and hitting us with a belt. But I am traveling to retrieve all of her instruction and good illustration with all my love. because I know that she did it with all her love.