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Chapter 26.4
Chapter 26.4

... http://www.cita.utoronto.ca/~dubinski/tflops/ ...
MAUI STARGAZING MAY OBSERVING LIST DEEP SPACE
MAUI STARGAZING MAY OBSERVING LIST DEEP SPACE

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... contain many young blue stars and a large amount of dust and gas. It is speculated that at the  center of a galactic bulge, there is a black hole.  Other galaxies are elliptical in shape and are ovoid and spherical. These galaxies contain much  less gas and dust than spiral galaxies and are thought  ...
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... • Appears the universe “exploded” from a single point in the past – the Big Bang • Age of the universe is 1/H0 or about 14 billion years ...
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... By monitoring a Cepheid star its distance from us can be calculated. Since we assume that nearly all the stars in a cluster are nearly the same age, we can determine the cluster’s age and distance ad some range of the galaxy. 2. What is the difference between an open cluster, an association, and a g ...
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... 4. Make a drawing of each type of galaxy and label them. Include 1-2 facts about each one. Indicate which one represents our own galaxy. Spiral Galaxy looks like a pinwheel and is the type of galaxy we live in. Elliptical galaxies look like flattened balls. The most common. Irregular Galaxies have n ...
The Universe - staff.harrisonburg.k12.va
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... This picture is called Eskimo because it looks like a face surrounded by a furry hood. The hood is, in fact, a ring of cometshaped objects flying away from a dying star. ...
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... This picture is called Eskimo because it looks like a face surrounded by a furry hood. The hood is, in fact, a ring of cometshaped objects flying away from a dying star. ...
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... What is the source of light in a galaxy? – How is energy produced by the sun? – How are sunspots, prominences, and solar flares related? – Why is our sun considered to be an average star? – How does our sun differ from stars in binary systems? ...
galaxies
galaxies

... Globular Clusters • millions to hundreds of millions of stars • old! 6 to 13 billion years • mostly red giants and dwarfs • stars are clumped closely together, especially near the center of the cluster (densely) • surround our disk as a halo Image at http://hubblesite.org/newscenter/archive/release ...
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Galaxy



A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas and dust, and dark matter. The word galaxy is derived from the Greek galaxias (γαλαξίας), literally ""milky"", a reference to the Milky Way. Galaxies range in size from dwarfs with just a few thousand (103) stars to giants with one hundred trillion (1014) stars, each orbiting their galaxy's own center of mass. Galaxies are categorized according to their visual morphology, including elliptical, spiral, and irregular. Many galaxies are thought to have black holes at their active centers. The Milky Way's central black hole, known as Sagittarius A*, has a mass four million times greater than our own Sun. As of July 2015, EGSY8p7 is the oldest and most distant galaxy with a light travel distance of 13.2 billion light-years from Earth, and observed as it existed 570 million years after the Big Bang. Previously, as of May 2015, EGS-zs8-1 was the most distant known galaxy, estimated to have a light travel distance of 13.1 billion light-years away and to have 15% of the mass of the Milky Way.Approximately 170 billion (1.7 × 1011) to 200 billion (2.0 × 1011) galaxies exist in the observable universe. Most of the galaxies are 1,000 to 100,000 parsecs in diameter and usually separated by distances on the order of millions of parsecs (or megaparsecs). The space between galaxies is filled with a tenuous gas with an average density less than one atom per cubic meter. The majority of galaxies are gravitationally organized into associations known as galaxy groups, clusters, and superclusters. At the largest scale, these associations are generally arranged into sheets and filaments that are surrounded by immense voids.
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