Goals of the day Clickers Order of Magnitude Astronomy
... • Observable universe is about size of our county on this scale ...
... • Observable universe is about size of our county on this scale ...
Lecture 1, PPT version
... Like the Milky Way, M31 is a spiral galaxy where most of the stars reside in a thin disk. The sun resides in the outer reaches of the Milky Way’s disk. Any idea where all the stars you see around M31 are actually located? ...
... Like the Milky Way, M31 is a spiral galaxy where most of the stars reside in a thin disk. The sun resides in the outer reaches of the Milky Way’s disk. Any idea where all the stars you see around M31 are actually located? ...
Goals of the day Clickers Order of Magnitude Astronomy
... • Observable universe is about size of our county on this scale ...
... • Observable universe is about size of our county on this scale ...
September 3 and 5 slides
... the MW in the solar neighborhood is much less than in the spiral nebulae ...
... the MW in the solar neighborhood is much less than in the spiral nebulae ...
Colonization of the Milky Way The distances between the stars are
... They wouldn’t even have to do it themselves. Another possibility would be to send selfreplicating machines that make copies of themselves from the local resources of any system they found. Incidentally, this argument does not work when we consider the distances between galaxies. For example, the nea ...
... They wouldn’t even have to do it themselves. Another possibility would be to send selfreplicating machines that make copies of themselves from the local resources of any system they found. Incidentally, this argument does not work when we consider the distances between galaxies. For example, the nea ...
A-105 Homework 1
... 4. (1 pt.) Why do astronomers conclude that metal-poor stars are older than metal-rich stars? ...
... 4. (1 pt.) Why do astronomers conclude that metal-poor stars are older than metal-rich stars? ...
Earth_Universe04
... • Large spiral galaxy • About 100,000 light-years wide • Thickness at the galactic nucleus is about 10,000 light-years • Three spiral arms of stars • Sun is 30,000 light-years from the center ...
... • Large spiral galaxy • About 100,000 light-years wide • Thickness at the galactic nucleus is about 10,000 light-years • Three spiral arms of stars • Sun is 30,000 light-years from the center ...
A105 Stars and Galaxies
... This false-color image of the central region of our Milky Way Galaxy was made with the Chandra X-ray telescope. The bright, point-like source at the center of the image was produced by a huge X-ray flare in the vicinity of the supermassive black hole. ...
... This false-color image of the central region of our Milky Way Galaxy was made with the Chandra X-ray telescope. The bright, point-like source at the center of the image was produced by a huge X-ray flare in the vicinity of the supermassive black hole. ...
Document
... Andromeda, and determined their distance. Andromeda contains a spiral-shaped galaxy that, at a distance of 2.2 million light-years, is the farthest object visible to the naked eye. He calculated that Andromeda must be at least 10 times farther away than the farthest stars in the Milky Way. The Andro ...
... Andromeda, and determined their distance. Andromeda contains a spiral-shaped galaxy that, at a distance of 2.2 million light-years, is the farthest object visible to the naked eye. He calculated that Andromeda must be at least 10 times farther away than the farthest stars in the Milky Way. The Andro ...
Stars - Robert M. Hazen
... – Result of collapse large star – Nothing escapes from surface – Cannot see them • See impact on other stars • Detect x-rays, gamma rays ...
... – Result of collapse large star – Nothing escapes from surface – Cannot see them • See impact on other stars • Detect x-rays, gamma rays ...
Descriptions For Posters
... ‘This Is No Supermodel Spiral’. Galaxies, like humans, are not all supermodels. This little spiral, known as NGC 4102, has a different kind of appeal, with its tightly-wound spiral arms and understated, but charming, appearance. NGC1084, a near-perfect example of a loose spiral galaxy with a near-pe ...
... ‘This Is No Supermodel Spiral’. Galaxies, like humans, are not all supermodels. This little spiral, known as NGC 4102, has a different kind of appeal, with its tightly-wound spiral arms and understated, but charming, appearance. NGC1084, a near-perfect example of a loose spiral galaxy with a near-pe ...
Position in Solar System ppt
... gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained within and dense it began enough to move for the inmore aforming first giant and larger as it collected more and of The star in hot the center eventua ...
... gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained within and dense it began enough to move for the inmore aforming first giant and larger as it collected more and of The star in hot the center eventua ...
Positions in the Solar System
... gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained within and dense it began enough to move for the inmore aforming first giant and larger as it collected more and of The star in hot the center eventua ...
... gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained within and dense it began enough to move for the inmore aforming first giant and larger as it collected more and of The star in hot the center eventua ...
Slide 1
... gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained within and dense it began enough to move for the inmore aforming first giant and larger as it collected more and of The star in hot the center eventua ...
... gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained within and dense it began enough to move for the inmore aforming first giant and larger as it collected more and of The star in hot the center eventua ...
Galactic astronomy - Sierra College Astronomy Home Page
... – Dust reradiates the absorbed energy in the infrared; – The most conspicuous type of bright emission nebula are HII regions. ...
... – Dust reradiates the absorbed energy in the infrared; – The most conspicuous type of bright emission nebula are HII regions. ...
the star
... of the Milky Way Galaxy because of the presence of dust. Only the 1500 most luminous of these stars are plotted. Most of these are visible to the unaided eye. Note the presence of the Hyades cluster. ...
... of the Milky Way Galaxy because of the presence of dust. Only the 1500 most luminous of these stars are plotted. Most of these are visible to the unaided eye. Note the presence of the Hyades cluster. ...
Where do we come from?
... years The growth of black holes. Clusters of gargantuan black holes (1011 solar masses) in place of clusters of galaxies. Moving black holes radiate gravitational waves (ripples in space-time). ...
... years The growth of black holes. Clusters of gargantuan black holes (1011 solar masses) in place of clusters of galaxies. Moving black holes radiate gravitational waves (ripples in space-time). ...
Measuring large distances
... both ends of the baseline. The angles to the object from each starting point are different. • A little trigonometry shows how far out each line of sight meets the other. ...
... both ends of the baseline. The angles to the object from each starting point are different. • A little trigonometry shows how far out each line of sight meets the other. ...
3rd EXAM VERSION A key - Department of Physics and Astronomy
... C. a galaxy that is still in the process of formation from the intergalactic medium and is undergoing its first episode of star formation D. a galaxy with stars moving radially outward in all directions from the explosion of the accretion disk of its central supermassive black hole 14. The rotation ...
... C. a galaxy that is still in the process of formation from the intergalactic medium and is undergoing its first episode of star formation D. a galaxy with stars moving radially outward in all directions from the explosion of the accretion disk of its central supermassive black hole 14. The rotation ...
Stars and Constellations Power Point
... light years thick. Our sun is located 30,000 light years from the nucleus. It takes the sun 200 million years to make one Revolution around the center. ...
... light years thick. Our sun is located 30,000 light years from the nucleus. It takes the sun 200 million years to make one Revolution around the center. ...
distance to the centre of the Milky Way.
... stars, planets, galaxies, gas, dust, radiation, dark matter, empty space, as far as we can see ...
... stars, planets, galaxies, gas, dust, radiation, dark matter, empty space, as far as we can see ...
30galaxies and the universe
... determined during the galaxy formation process. This shows that there is a close relationship between the black hole mass and the stars that comprise an elliptical galaxy or central bulge stars of a spiral galaxy. In most cases, the black holes not only bulked up through the accretion of gas, but al ...
... determined during the galaxy formation process. This shows that there is a close relationship between the black hole mass and the stars that comprise an elliptical galaxy or central bulge stars of a spiral galaxy. In most cases, the black holes not only bulked up through the accretion of gas, but al ...
Measuring Distances - Stockton University
... are spread out a lot in the velocity direction. • This feature suggests the presence of a large cluster of galaxies, like the Virgo Cluster. • In addition to their "Hubble velocities", these galaxies have an extra velocity caused by their orbital motion around the center of the cluster. – Because cl ...
... are spread out a lot in the velocity direction. • This feature suggests the presence of a large cluster of galaxies, like the Virgo Cluster. • In addition to their "Hubble velocities", these galaxies have an extra velocity caused by their orbital motion around the center of the cluster. – Because cl ...
Standard EPS Shell Presentation
... Stars that fall into the band that stretches diagonally from cool, dim stars to hot, bright stars are called main sequence stars. ...
... Stars that fall into the band that stretches diagonally from cool, dim stars to hot, bright stars are called main sequence stars. ...
The Mass Assembly of Galaxies
... There is a cluster of B stars in the central 1’’ of the galaxy, the so-called S-cluster. These high proper motion stars - in particular star S2 - show that Sgr A* is a black-hole of 3-4 million solar masses. Large numbers of young stars, in particular O supergiants and WR stars are observed within 2 ...
... There is a cluster of B stars in the central 1’’ of the galaxy, the so-called S-cluster. These high proper motion stars - in particular star S2 - show that Sgr A* is a black-hole of 3-4 million solar masses. Large numbers of young stars, in particular O supergiants and WR stars are observed within 2 ...
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.