A galaxy is a massive‚ gravitationally bound system consisting of stars‚ an interstellar medium of gas and dust‚ and dark matter. The name is from the Greek root galaxias [γαλαξίας]‚ meaning "milky‚" a reference to the Milky Way galaxy. Typical galaxies range from dwarfs with as few as ten million (107) stars up to giants with one trillion (1012) stars‚ all orbiting a common center of mass. Galaxies can also contain many multiple star systems‚ star clusters‚ and various interstellar clouds. The Sun
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Universe to The Milky Way The Birth of Modern Cosmology Cosmology is the study of the structure and evolution of the universe (Bennett‚ Donahue‚ Schneider‚ & Voit‚ 2010). Edwin Hubble is often credited with the birth of modern cosmology. He discovered that the Andromeda galaxy was in fact a separate galaxy from the Milky Way. By comparing various photographs taken over several nights and measuring the Cepheids and their luminosities‚ Hubble’s discovery changed the way we view the universe
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Professor - The Milky Way is the galaxy that contains the Earth. This name derives from its appearance as a dim milky glowing band stretching across the night sky‚ in which the naked eye cannot distinguish individual stars. The term Milky Way is a translation of classical Latin ____ from the Hellinistic Greek‚ Milky Circle. The Milky Way appears like a band disk-shaped structure being viewed from inside. The fact that this faint band of light is made up of stars in 1610 when Galileo Galilei used
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9H January 12‚ 2012 Finding the Milky Way I often gaze into the night sky only to find bright lights and strange shapes I don’t understand. Starting at a young age‚ I enjoyed waiting for shooting stars and searching for the famous Big Dipper consolation as many nights as I could. As I grew older‚ I learned more and more about the universe and all that it contains. Today‚ I am even more intrigued by‚ not just the universe‚ but our very own Milky Way galaxy. I am amazed by its complicated systems
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Summery Analysis The Milky Way is the earths’ galaxy and it’s happening’s hold the interest of many scientists. In Daryl Haggard and Geofrey C Bower’s article “Into the Heart of the Milky Way” they discuss a phenomena that was discovered in the nucleus of the Milky Way only forty years ago which is a supermassive black hole called Sagittarius A* right in the core. Throughout the article the author’s explain many unpredictable events that have been observed. The article begins by explaining the G2
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does Hubble’s law predict about the speed of a galaxy far away from the Milky Way compared to one that is closer? Hubble’s law predicted that galaxies were moving away from earth at a rate proportional to their distance from us. The farther away from the Milky Way a galaxy is‚ the larger the redshift is. The farther away a galaxy is‚ the faster it is moving away. Conversely‚ blueshifted galaxies‚ such as Andromeda‚ are moving closer to the Milky Way. 2. In a few sentences‚ describe Hubble’s
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of the Milky Way By Nathanael Roybal; Geological Sciences ABSTRACT The Milky way is a band of light that has millions of stars that are combined together and that spans 100‚000 light years away. They say the Milky Way is about 14 billion years old. How they figured this out by measuring the ages of each star. They have found trace elements of hydrogen and helium so we know that the Milky Way was formed an early in the history. Another good way to find the age of the stars in the Milky Way is measuring
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Describe how galaxies are formed. The universe is made of clusters of galaxies‚ and clusters of clusters of galaxies‚ called super clusters. Galaxies are comprised of tens of millions of stars. Between the stars‚ there are interstellar clouds of gas and dust. The smallest galaxies are called dwarfs while the largest are called giants. Our Milky Way Galaxy is one of three large galaxies in the Local Group of Galaxies. The other large galaxies are the Andromeda Galaxy‚ and Messier 33‚ also in the
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used to discover the first quasars was based on coincidences between a strong radio source and a point-like optical source. Since each radio source was associated with a star it was originally thought that quasars were objects within the galaxy hence the term ’radio stars’. Quasars or quasi-stellar radio source‚ from the method by
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Young Discoverer Series UNIVERSE NICKNAMES OF PLANETS: Mercury – Speedy Messenger. Venus – Morning or Evening Star. Earth – The Blue Planet. Mars – The Red Planet. Jupiter – Jove or the Galilean System. Saturn – The Ringed Planet. Uranus – Father Sky. Neptune – The Windy Planet. Pluto – The Ice Planet. DEFINITIONS: STAR: A huge body made of hot luminous gas that is held together by its own gravity. Compared to other stars‚ our Sun is a star of average size and energy. PLANET: A large
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