Research Paper on "Features of the Milky Way Galaxy"

Research Paper 3 pages (1052 words) Sources: 3

[EXCERPT] . . . .

features of the Milky Way Galaxy is Open Clusters or Galactic Clusters. There are about 1000 stars in the clusters and together there are approximately 20,000 clusters in the Milky Way. The largest concentration of the clusters is located in the main body or the plane of the galaxy. This phenomenon received the name Open Clusters because of the way that they appear. The stars that they contain are spread out very wide and there is no discernable pattern in the arrangement of the stars. Additionally, the distance between the stars is very large and there is "less than one star in a cubic parsec of space" (the Milky Way Galaxy 2012). The exciting aspect of these stars is that they contain mainly young stars and hot stars. In this regard many of the stars are very much like our sun. The brightness and the hue of the stars also make them easy to observe. These features mean that the visual presentation of these stars is stunning as well as exciting to observe.

The Globular Cluster was discovered by Messier in 1764. Messier 12 (M12, NGC 6218) as the object is known is marginally larger and more luminous that its close neighbor M10. It is very diffuse, particularly in the center where it is visibly less dense than M10. The spectral type of the cluster was identified as F7 and the color index as 0.0. The "mean magnitude of the 25 brightest stars is 13.97" (Messier 12, 2005) There is however a horizontal band of stars whose magnitude exceeds the mean and they are rated at 13.97.

M12

Dark energy is one of the key concepts employed to explain the expansion of the universe. The major challenge of dark energy is that this concept is difficult to explain. It is essentially a mystery (Dark energy dark matter 2012). The understanding of the expansion of the universe change dramatically based on observations from the Hubble telescope, prior to Hubble it was believed that the universe's expansion could be stopped and thus the possibility of re-collapse eliminated. This was based on the theory that gravity would slow the expansion. There was no empirical evidence to support this view but the proposition found suitable theoretical support. However Hubble images showed that the universe has been expanding at a faster rate than previously expected.

There are multiple explanations of for this phenomenon; dark energy is one of the explanations. Dark energy is considered to be a property of space itself. Empty space contains something so as space expands this dark energy increases. Other theorists suggest that dark energy is a new kind of dynamic energy fluid. Consequently, while there is a lot of theorizing about dark energy it remains enigmatic.

The most likely fate for the Universe is an accelerating Universe. The changing nature of the Universe continues to elicit a lot of theorizing. An accelerating Universe however is highly consistent with the following, firstly Hubble telescope data. The existing data suggest that the galaxies are moving away from each other. This empirical evidence from supernovae is stronger than the theoretical postulations previously advanced. Additionally, if the universe… READ MORE

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