IS AN ALTERNATE COSMOLOGY BECOMING NECESSARY?
... of mathematical basis when in fact very little is actually known yet about how it all functions, an interaction of many facets of physics, much of it known. Due to the notion of a fourteen billion year age, there is the notion that small galaxies could rapidly build larger galaxies via mergers. For ...
... of mathematical basis when in fact very little is actually known yet about how it all functions, an interaction of many facets of physics, much of it known. Due to the notion of a fourteen billion year age, there is the notion that small galaxies could rapidly build larger galaxies via mergers. For ...
Astrophysics - Florence
... Large grouping of stars, gas, and dust in space that are held together by gravity. ...
... Large grouping of stars, gas, and dust in space that are held together by gravity. ...
Chapter 26
... and contain 100 million to 10 billion stars, making them larger than dwarf ellipticals but smaller than spirals. ...
... and contain 100 million to 10 billion stars, making them larger than dwarf ellipticals but smaller than spirals. ...
Galaxy Characteristics
... V(R) = velocity at radius R (rotation curve) i = tilt from perpindicular (i=0 face on) f = angle from motion towards/away This can be solve for the rotation curve ...
... V(R) = velocity at radius R (rotation curve) i = tilt from perpindicular (i=0 face on) f = angle from motion towards/away This can be solve for the rotation curve ...
The Size and Structure of the Milky Way Galaxy
... Dark Matter: A Major Problem for Contemporary Physics and Astronomy • Stars are a small fraction of the mass of major galaxies • The dark matter problem becomes more pronounced as you go out in the universe • The form of the dark matter is unknown; probably not what you studied in chemistry • Possi ...
... Dark Matter: A Major Problem for Contemporary Physics and Astronomy • Stars are a small fraction of the mass of major galaxies • The dark matter problem becomes more pronounced as you go out in the universe • The form of the dark matter is unknown; probably not what you studied in chemistry • Possi ...
Solar System where_are_we
... Because we dwell within the Milky Way Galaxy, it is impossible for us to take a picture of its spiral structure from the outside. But we do know that our Milky Way has a spiral nature from observations made from within our Galaxy (though whether or not it is a barred spiral is still being debated). ...
... Because we dwell within the Milky Way Galaxy, it is impossible for us to take a picture of its spiral structure from the outside. But we do know that our Milky Way has a spiral nature from observations made from within our Galaxy (though whether or not it is a barred spiral is still being debated). ...
Our Galaxy, the Milky Way Galaxy
... Gas permeates the entire Milky Way Galaxy (and any other galaxy) o 75% atomic hydrogen (just hydrogen atoms) and 25% helium o Known as ISM (aka Interstellar Medium) o Gas does not even feel gravity (because it is so diffuse) o Gas is moving around randomly because of this o Radiation pressure is pus ...
... Gas permeates the entire Milky Way Galaxy (and any other galaxy) o 75% atomic hydrogen (just hydrogen atoms) and 25% helium o Known as ISM (aka Interstellar Medium) o Gas does not even feel gravity (because it is so diffuse) o Gas is moving around randomly because of this o Radiation pressure is pus ...
6-Where to Survey - The Challenger Learning Center
... Image credit: http://www.universetoday.com/wp-content/uploads/2011/02/oort-cloud-nasa.jpg ...
... Image credit: http://www.universetoday.com/wp-content/uploads/2011/02/oort-cloud-nasa.jpg ...
PHYS 175 (2014) Final Examination Name: ___SOLUTION_____
... Massive objects warp spacetime. If a massive object is aligned between an observer and a light source, some rays of light from the source, which would not normally be directed toward the observer, can be deflected toward the observer. The effect may ma ...
... Massive objects warp spacetime. If a massive object is aligned between an observer and a light source, some rays of light from the source, which would not normally be directed toward the observer, can be deflected toward the observer. The effect may ma ...
lecture2_3
... •Study their motions, measure their speeds •Fundamental to understand the evolution of the sources and how their interact with each other (e.g. merging, collisions) •Measure their redshift, determine their distance from us •Fundamental to chart the large-scale structure of the Universe and to study ...
... •Study their motions, measure their speeds •Fundamental to understand the evolution of the sources and how their interact with each other (e.g. merging, collisions) •Measure their redshift, determine their distance from us •Fundamental to chart the large-scale structure of the Universe and to study ...
review
... Our Milky Way galaxy is disk shaped with a central bulge, and a low density spherical halo. Disk and halo are about 30kpc across. The central bulge is a few kpc across. There are about 1011 (100 billion) solar masses in the galaxy, so about that many stars. Measuring distances in the galaxy uses var ...
... Our Milky Way galaxy is disk shaped with a central bulge, and a low density spherical halo. Disk and halo are about 30kpc across. The central bulge is a few kpc across. There are about 1011 (100 billion) solar masses in the galaxy, so about that many stars. Measuring distances in the galaxy uses var ...
Kroupa - SatelliteGa.. - University of Hertfordshire
... cosmological models predict the presence of hundreds of these companions around most of the larger galaxies, but up to now only 30 have been observed around the Milky Way. The team of scientists looked at the distribution of these satellite dwarf galaxies and discovered they were not where they shou ...
... cosmological models predict the presence of hundreds of these companions around most of the larger galaxies, but up to now only 30 have been observed around the Milky Way. The team of scientists looked at the distribution of these satellite dwarf galaxies and discovered they were not where they shou ...
Historical overview
... to be a part of the Milky Way! These must be other galaxies! (current distance values 2.5 million and 2.7 million light years) ...
... to be a part of the Milky Way! These must be other galaxies! (current distance values 2.5 million and 2.7 million light years) ...
CosmologyL1
... detecting nearly 200 million celestial objects, and it measured spectra of more than 675,000 galaxies, 90,000 quasars, and 185,000 stars. ...
... detecting nearly 200 million celestial objects, and it measured spectra of more than 675,000 galaxies, 90,000 quasars, and 185,000 stars. ...
1” “Sky-Notes” of the Open University Astronomy Club. April 2005
... “Sky-Notes” of the Open University Astronomy Club. April 2005. All times shown are UT. ...
... “Sky-Notes” of the Open University Astronomy Club. April 2005. All times shown are UT. ...
Hubblecast Episode 68: The Hubble time machine Visual notes 00
... 10. Hubble is still searching the distant Universe for clues about how the Universe formed, and how it has evolved. Several of Hubble’s surveys, for example CANDELS, CLASH, and GOODS, are scanning for distant supernova explosions, objects that are good celestial distance markers. Observations of dis ...
... 10. Hubble is still searching the distant Universe for clues about how the Universe formed, and how it has evolved. Several of Hubble’s surveys, for example CANDELS, CLASH, and GOODS, are scanning for distant supernova explosions, objects that are good celestial distance markers. Observations of dis ...
printer-friendly sample test questions
... A. The once-smaller universe is expanding in all directions. B. The Sun and Earth are located at the center of the universe. C. Everything in the universe is moving the same direction. D. Massive black holes are drawing galaxies away from Earth. 4. We know that nearly all galaxies are moving away fr ...
... A. The once-smaller universe is expanding in all directions. B. The Sun and Earth are located at the center of the universe. C. Everything in the universe is moving the same direction. D. Massive black holes are drawing galaxies away from Earth. 4. We know that nearly all galaxies are moving away fr ...
Light Years - Spring Creek Elementary
... The entire Milky Way galaxy is about 80,000 to 100,000 light years in diameter and about 250,000 to 300,000 light years in circumference. The Milky Way consists of 200 to 400 billion stars. The Milky Way is one of billions of galaxies in the known universe. One of the closest galaxies to our own is ...
... The entire Milky Way galaxy is about 80,000 to 100,000 light years in diameter and about 250,000 to 300,000 light years in circumference. The Milky Way consists of 200 to 400 billion stars. The Milky Way is one of billions of galaxies in the known universe. One of the closest galaxies to our own is ...
HW6 due - Yale Astronomy
... The sun will collide with another star of the same size (radius = 1 Rsun) if it comes within a distance of 2Rsun of that star. (Their edges will just touch if they come within a distance ...
... The sun will collide with another star of the same size (radius = 1 Rsun) if it comes within a distance of 2Rsun of that star. (Their edges will just touch if they come within a distance ...
How the universe began
... light appears redder than expected because its wavelength is stretched. • Hubble’s results proved that galaxies move away from us. • The galaxies further away have a bigger red shift because they are moving away faster than closer galaxies ...
... light appears redder than expected because its wavelength is stretched. • Hubble’s results proved that galaxies move away from us. • The galaxies further away have a bigger red shift because they are moving away faster than closer galaxies ...
The Milky Way Galaxy
... found on the edges of the galaxy. • Harlow Shapley found the distance to these clusters and he plotted their positions. • For them to fit, the Milky Way must be around 30 kpc across. (Shapley miscalcuated to around 40 kpc. ...
... found on the edges of the galaxy. • Harlow Shapley found the distance to these clusters and he plotted their positions. • For them to fit, the Milky Way must be around 30 kpc across. (Shapley miscalcuated to around 40 kpc. ...
Things to know: This meant as a guide to what you should know. I
... Be able to recognize in an inertial reference frames. The speed of light is the same for all inertial reference frames. What unusual distortions in time and space are experienced when one moves at speeds near the speed of light? What is gravity in Einstein’s general theory of relativity? What is all ...
... Be able to recognize in an inertial reference frames. The speed of light is the same for all inertial reference frames. What unusual distortions in time and space are experienced when one moves at speeds near the speed of light? What is gravity in Einstein’s general theory of relativity? What is all ...
The Milky Way – A Classic Galaxy
... • Theoretical PL relations using different assumptions of the internal structure do, or do not, show a metallicity effect). • Observationally, old “metal poor” Cepheids may have a slightly different PL relation than young “metal rich” Cepheids but it is slight. The Cepheid PL relation is essentially ...
... • Theoretical PL relations using different assumptions of the internal structure do, or do not, show a metallicity effect). • Observationally, old “metal poor” Cepheids may have a slightly different PL relation than young “metal rich” Cepheids but it is slight. The Cepheid PL relation is essentially ...
Galaxy
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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.