Tutorial 4 AY2013/14 S2 Stars Brightness‚ Luminosity and Stefan’s Law 1. The Sun has an apparent magnitude of -26.7‚ and Sirius has an apparent magnitude of -1.47. By what factor is the Sun brighter than Sirius in apparent brightness? Note: we define a change of 5 in apparent magnitude to correspond to a factor of 100 in apparent brightness. 2. Sirius is fainter than the Sun in apparent brightness because Sirius lies at a great distance‚ and the apparent brightness of a star is inversely proportional
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R*. It represent the 7 new stars forming annually in a year. According to NASA‚ they reported about new stars forming‚ "The team found and confirmed aluminum-26 is found primarily in star forming regions throughout the galaxy and each year our galaxy creates on average about seven new stars." The next value is fp‚ this represents the fraction of those stars per planetary systems. Since there is relationship a 1 to1 ratio of planetary systems between stars and within stars of each habitable planet‚
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Space Math Differentiation - "Ch..Ch..Ch..Changes" There are many situations in which differentiation has to be performed on formulae in astrophysics. Many objects such as stars and galaxies display ’differential rotation’ which leads to many interesting and unusual phenomena. The formula describing these phenomena are usually ’differential equations’ that relate changes in one quantity to changes in another. Here are some popular equations used in astrophysics whose differentiation
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Pleiades star cluster or “the Seven Sisters” is among the nearest star clusters to Earth and the most discernible to the naked eye. Visible from nearly every location on the planet‚ Pleiades can be seen from the north pole to the southernmost tip of South America. Historically‚ the Pleiades were seen as a group of seven stars‚ Alcyone‚ Atlas‚ Electra‚ Maia‚ Merope‚ Taygeta and Pleione. With modern technology‚ we now know that the Pleiades cluster is actually comprised of several hundred stars. The Pleiades
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special equipment for seeing black holes. The tools can see how stars around the black hole act differently than the stars away from the black hole. Black holes were first discovered in 1916 by Karl Schwarzschild. Scientist can not see the black hole because of the strong gravitational pull that takes all the light from the area. They were discovered by how they change stars’(that are around them) orbits.When the black hole and the star are close together‚ it creates a high-energy light that can not
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feel that people who are not famous are happier than stars. Fame does not bring happiness because of lost privacy‚ expectations the stars are hailed to‚ and the personal and family time that is lost in a stars life. Privacy becomes an issue because of the paparazzi‚ articles about the stars‚ and when stars go into the public eye. When somebody becomes a star‚ the paparazzi follows them around and continually tries to know the details of the stars life. The paparazzi then writes articles and the articles
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Al Nahda National Schools (Boys) Class: 12G‚ H & I Teacher: Nidal Al Halabi life cycle of a star Physics The life cycle of a star The Life of a small Star‚ a star of mass up to eight times that of the sun(< 8M o) or has a core remnant of mass up to one and a half times that of the sun(< 1.5M o)‚ can be summarized in the following stages: Stage 1- Stars are born in a region of high density Nebula. Stage 2 – Under its own gravitational force‚ interstellar clouds of dust and gases condenses
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three-dimensional view of the distribution of globular star clusters is represented by a sphere centered on galactic center. A)True B)False 2) Shapley concluded that the Solar System couldn’t be located at the center of the galaxy. He observed : A) an even distribution of globular clusters in all directions. B) more globular clusters in certain directions. C) an uneven‚ random scattering of globular clusters across the sky. 3) Since the stars inside the horse’s head in the Hubble Space Telescope
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galaxy there are over a hundred billion stars. It is known to be the brightest galaxy. The Andromeda Galaxy is a spiral galaxy and is part of the Local Group. It has a large star cluster in its heart and a very large hidden black hole deep in the core. The middle is very bright and around it are spirals with many colors. It has a round disk of stars that rotate around the middle and two main spiral arms made of stars. In the spirals many new blue stars appear. At first astronomers were not
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Athletes and Brothers as Role Models In today’s world‚ sport stars and other athletes are looked up to by all ages. When a star athlete does something good for charity or helps in a fundraiser‚ they set a positive example. But when a star athlete does something bad‚ like get arrested‚ do drugs‚ or drinks‚ they give kids the wrong idea. Often in society‚ we focus more on stars negative actions instead of their positive actions. Courage and determination aren’t the only lessons we can learn
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