This might seem to be a universal principle of logic, and indeed if you throw your car keys in the air, they will come crashing down to the floor on earth. But nearly a "decade ago, astronomers discovered that what is true for your car keys is not true for the galaxies. Having been impelled apart by the force of the Big Bang, the galaxies, in defiance of cosmic gravity, are picking up speed on a dash toward eternity. If they were keys, they would be shooting for the ceiling" (Overbye, 2008, p1.). According to Dennis Overbye of the New York Times on June 3, 2008, modern astronomers admit they cannot understand why this is true, or the implications for the future of the universe. Scientists call this anti-gravitational pull dark energy, as opposed to dark matter.
Overbye's article illustrates a profound, but what may be to some readers, surprising idea -- there is much that scientists still do not know about the principles at work in the universe. And they may never find an answer to the question of why dark energy exists, no matter how much time, money, effort, and technology is poured into the process by some of the finest minds in the world. True, scientists have come to a consensus upon the fact that the universe began 13.7 billion years ago with the Big Bang. The universe is made up of "4% atoms and 22% so-called dark matter of unknown identity -- perhaps elementary particles...that leaves 74% for the weight of whatever began causing the cosmos to accelerate about five billion years ago" known as dark energy (Overbye, 2008, p.1).
Before the discovery of the dark energy, quantum physicists tended to assume that the "vacuum' we live in has some deep meaning that reflects nature's deepest secrets" (Overbye, 2008, p1.). However, in 1998 astronomers discovered that the expansion of the universe was inexplicably accelerating much faster than predicted. They were studying exploding stars known as Type 1a supernovas to investigate the history and fate of the universe. "They found, on the basis of a few dozen of these stars, that the more distant ones were dimmer than expected, meaning that they had been carried farther away by the cosmic expansion than expected, meaning that the universe was speeding up" inexplicably, due to the effects of dark energy (Overbye, 2008,...
Managers earning organisations 21st century a broader range Skills, Knowledge Attributes succeed. Issues rapid change, shifts management thinking, understanding global context, continuous improvement ongoing leadership development impact aspiring manager. KSAs of the 21st century workforce Why KSAs are important At the beginning of the 20th century, the knowledge, skills, and attributes of workers were defined in a relatively concrete, fixed, and limited fashion. In factory systems of mass production it was demanded
A similar trend was seen in many areas of U.S. society, such as the restriction of medicinal claims on products and other trends that began in the same decade. It was very interesting to find that the U.S. Armed Forces had any part in distance education, and specifically how broad the areas of study offered by the U.S. Armed Forces Institute. The student base of about 500,000 is also interesting
The study of physics, optics and biology of the eye contributed to the development of the quadrant and sextant. The Islamic world also created the concept of a library. The Crusades of the eleventh century brought the learning of the Islamic world to Europe unfortunately this information was acquired by the act of war. The Crusades also increased the flow of trade, bringing new spices, gemstones and foods to Europe.
S. In closing consider that our ability to navigate out of one of the world recessions in 0 years is a result of the cash management and global funding concepts attained during space program development (Maitner Jr., Otero, 58, 59). For America to forfeit this lead and allow for the industrialization of space by another nation (Williamson, 406, 407) is to allow these many strengths of our nation to lapse.
Professional Interview Analysis This is in an interview of a lead teacher with extensive experience in public relation, administration and educating. She oversees the formulation and implementation of standards and policies in her school. Since she works in management, per of her job is ensuring that educators working in the school are sufficiently motivated to work. This interview gives a glimpse of all it takes to run a school. It gives
Juvonen et al., (2004) explains that a teachers in depth understanding of mathematics in particular is extremely important in middle school. The authors also point out that learning more difficult math in the eighth grade such as math is imports because 8th grade students who take algebra are more likely to apply to college than those that don't (Atanda, 1999). In addition the authors insists that when middle school
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