young science communicator`s competition
... and it seems that Shapley was right, the galaxy is indeed much bigger than expected and in fact, the sun is not at the centre of the galaxy, we seem to live quite far from it. [There is a stunned silence] SHAPLEY: So it seems we were both right. CURTIS: And both wrong. [The crowd cheers and sound f ...
... and it seems that Shapley was right, the galaxy is indeed much bigger than expected and in fact, the sun is not at the centre of the galaxy, we seem to live quite far from it. [There is a stunned silence] SHAPLEY: So it seems we were both right. CURTIS: And both wrong. [The crowd cheers and sound f ...
Document
... • Red Stars (Pop II) in bulge and halo • This is true for other galaxies as well • Pop II stars may have elongated tilted orbits whereas Pop I stars orbits are in the disk ...
... • Red Stars (Pop II) in bulge and halo • This is true for other galaxies as well • Pop II stars may have elongated tilted orbits whereas Pop I stars orbits are in the disk ...
The Milky Way Galaxy
... edge of the system, I find no more fainter stars. By repeating this procedure along all directions, I can get an idea of the shape of the stellar system. Once I measure the distance to the stars, I also estimate the size. Herschel and Kapteyn did just that and other things, and concluded that the Ga ...
... edge of the system, I find no more fainter stars. By repeating this procedure along all directions, I can get an idea of the shape of the stellar system. Once I measure the distance to the stars, I also estimate the size. Herschel and Kapteyn did just that and other things, and concluded that the Ga ...
The Search for the Earliest Galaxies
... holes at their cores with gas. The accretion of material onto the black holes produced quasars which then emitted powerful, far-ultraviolet radiation that provided enough energy to reionize the helium. This radiation also interrupted the growth of some small galaxies because the gas clouds within th ...
... holes at their cores with gas. The accretion of material onto the black holes produced quasars which then emitted powerful, far-ultraviolet radiation that provided enough energy to reionize the helium. This radiation also interrupted the growth of some small galaxies because the gas clouds within th ...
intergalactic move
... to a different part of our Galaxy? Our Galaxy, the Milky Way, is so big that it would take 100.000 years to cross from one side to the other. It is shaped like a whirlpool: it has bands of stars that spiral around the centre, which astronomers call the Galaxy’s ‘arms’. We live in the outer parts of ...
... to a different part of our Galaxy? Our Galaxy, the Milky Way, is so big that it would take 100.000 years to cross from one side to the other. It is shaped like a whirlpool: it has bands of stars that spiral around the centre, which astronomers call the Galaxy’s ‘arms’. We live in the outer parts of ...
Comments
... mutual feedback between star-forming spheroidal galaxies and the active nuclei growing in their cores to overcome, in the framework of the hierarchical clustering scenario for galaxy formation, one of the main challenges facing such scenario, the fact that massive spheroidal galaxies appear to have ...
... mutual feedback between star-forming spheroidal galaxies and the active nuclei growing in their cores to overcome, in the framework of the hierarchical clustering scenario for galaxy formation, one of the main challenges facing such scenario, the fact that massive spheroidal galaxies appear to have ...
Hubble`s Expansion of the Universe
... Hubble’s plot showed not only that most galaxies are moving away from us, but also that they were moving at different speeds. From the diagram it can be seen that radial velocity is proportional to distance – distant galaxies are moving away from Earth faster than nearby ones. This became known as H ...
... Hubble’s plot showed not only that most galaxies are moving away from us, but also that they were moving at different speeds. From the diagram it can be seen that radial velocity is proportional to distance – distant galaxies are moving away from Earth faster than nearby ones. This became known as H ...
Universe and Star Formation - White Plains Public Schools
... • Only 10 percent of the known galaxies have irregular shapes and are classified as irregular galaxies. • In addition to shape and size, one of the major differences among different types of galaxies is the age of their stars. Irregular galaxies contain young stars. ...
... • Only 10 percent of the known galaxies have irregular shapes and are classified as irregular galaxies. • In addition to shape and size, one of the major differences among different types of galaxies is the age of their stars. Irregular galaxies contain young stars. ...
Universal redshift, the Hubble constant The cosmic background
... Are quasars extremely far and luminous or close and moderate ? ...
... Are quasars extremely far and luminous or close and moderate ? ...
Chapter 1 Our Place in the Universe
... Earth orbits the Sun (revolves) once every year • The time it takes the Earth to complete one orbit around the Sun is called the orbital ...
... Earth orbits the Sun (revolves) once every year • The time it takes the Earth to complete one orbit around the Sun is called the orbital ...
Galaxies and the Universe
... • Definition: An object that has a parallax angle of 1 arcsecond is a parsec. • This is about 31 trillion km. Or 3.26 ly. • Proxima Centauri has a parallax of 0.77 arcseconds. So it is 1/0.77= 1.3 parsecs away. • Sense of scale: – If you make a model where the distance between the Earth and the Sun ...
... • Definition: An object that has a parallax angle of 1 arcsecond is a parsec. • This is about 31 trillion km. Or 3.26 ly. • Proxima Centauri has a parallax of 0.77 arcseconds. So it is 1/0.77= 1.3 parsecs away. • Sense of scale: – If you make a model where the distance between the Earth and the Sun ...
March 2010 - Pomona Valley Amateur Astronomers
... million light years away. That's a long was for any alien to travel. This telescopic object, discovered by E. E. Barnard in 1881, is one of a dozen satellite dwarf galaxies near our Milky Way. They include the more visible Large and Small Magellanic clouds, first charted by the explorer Magellan whe ...
... million light years away. That's a long was for any alien to travel. This telescopic object, discovered by E. E. Barnard in 1881, is one of a dozen satellite dwarf galaxies near our Milky Way. They include the more visible Large and Small Magellanic clouds, first charted by the explorer Magellan whe ...
Slide 1
... Quick Region Inventory (http://irsa.ipac.caltech.edu/applications/QuickStats/) View Catalog Coverage Maps and Source Inventories for the position or object name you are interested in Open SkyQuery (http://openskyquery.net/Sky/skysite/) - Query Databases and Cross-Match Object Lists from some of th ...
... Quick Region Inventory (http://irsa.ipac.caltech.edu/applications/QuickStats/) View Catalog Coverage Maps and Source Inventories for the position or object name you are interested in Open SkyQuery (http://openskyquery.net/Sky/skysite/) - Query Databases and Cross-Match Object Lists from some of th ...
7_Big_bang
... M31 is made out of lots of stars just like our own Milky Way! We are but one of very many galaxies! Stars were very dim. This implied M31 is very far away. Of order 3 million light years! [Note, today we think of this distance as a very close neigbor.] Read discussion and debate in the Perfect Machi ...
... M31 is made out of lots of stars just like our own Milky Way! We are but one of very many galaxies! Stars were very dim. This implied M31 is very far away. Of order 3 million light years! [Note, today we think of this distance as a very close neigbor.] Read discussion and debate in the Perfect Machi ...
Galaxy1
... • M 82 is smaller than M 81 yet it is producing stars at an enormous rate. Ten times faster than the Milky Way is producing stars. • Most of the erupted gas is coming from supernova explosions. This is star formation on steroids. • Why do you think this little galaxy is producing stars so rapidly? ...
... • M 82 is smaller than M 81 yet it is producing stars at an enormous rate. Ten times faster than the Milky Way is producing stars. • Most of the erupted gas is coming from supernova explosions. This is star formation on steroids. • Why do you think this little galaxy is producing stars so rapidly? ...
Milky Way I
... What Sustains the Spiral Pattern? • The stars in the galaxy revolve around the galactic center due to gravity • The galactic disk rotates differentially – stars near the center move faster than those farther away • This produces a spiral structure but should quickly wind up after a few rotations an ...
... What Sustains the Spiral Pattern? • The stars in the galaxy revolve around the galactic center due to gravity • The galactic disk rotates differentially – stars near the center move faster than those farther away • This produces a spiral structure but should quickly wind up after a few rotations an ...
powerpoint
... • Why is the sky dark at night? • If the universe were infinite and the density of galaxies was the same everywhere in the universe, then there should be a star in every single direction: the sky should be bright at night, but it is not. ...
... • Why is the sky dark at night? • If the universe were infinite and the density of galaxies was the same everywhere in the universe, then there should be a star in every single direction: the sky should be bright at night, but it is not. ...
Earth in the Universe Answer each in your binder or notebook. Date
... Which statement about stars is not accurate? A. A small group of stars is called a galaxy. B. Stars consist mainly of hydrogen and helium. C. Types of stars include red giants, super giants, and dwarf stars. D. Constellations of stars are found in different places in the sky. ...
... Which statement about stars is not accurate? A. A small group of stars is called a galaxy. B. Stars consist mainly of hydrogen and helium. C. Types of stars include red giants, super giants, and dwarf stars. D. Constellations of stars are found in different places in the sky. ...
Chapter 24
... • Outermost stars move the slowest • Sun rotates around the galactic nucleus once about every 200 million years ...
... • Outermost stars move the slowest • Sun rotates around the galactic nucleus once about every 200 million years ...
astrocoursespring2012lec5-1-1
... orbiting around a red giant companion from which it is "gobbling up" matter because of its strong gravitational pull, is pushed over the limiting mass which such a white dwarf star is allowed to have: the Chandrasekhar Limit, about 1.4 times the mass of the Sun. When this limiting mass is exceeded, ...
... orbiting around a red giant companion from which it is "gobbling up" matter because of its strong gravitational pull, is pushed over the limiting mass which such a white dwarf star is allowed to have: the Chandrasekhar Limit, about 1.4 times the mass of the Sun. When this limiting mass is exceeded, ...
Catherine Cress - CHPC Conference
... 2. N-body simulations for galaxy evolution and cosmology studies 3. Statistical techniques for experimental “forecasting” eg MCMC ...
... 2. N-body simulations for galaxy evolution and cosmology studies 3. Statistical techniques for experimental “forecasting” eg MCMC ...
Quasars: Back to the Infant Universe
... a black hole with mass of 1.2 billion M⊙ black hole with mass of 3 billion M⊙ ...
... a black hole with mass of 1.2 billion M⊙ black hole with mass of 3 billion M⊙ ...
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.