IAC_L1_intro
... What are the issues with galaxy formation in CDM ? • CDM predicts an active ongoing accretion history, leaving debris of accreted satellites in the stellar disk and halo. (The first stars probably came from small dense accreted systems which formed before the Milky Way itself). A very active accret ...
... What are the issues with galaxy formation in CDM ? • CDM predicts an active ongoing accretion history, leaving debris of accreted satellites in the stellar disk and halo. (The first stars probably came from small dense accreted systems which formed before the Milky Way itself). A very active accret ...
Time From the Perspective of a Particle Physicist
... and Matt Weisner. see their theses at www.physics.niu.edu/physics/academic/grad/theses1.shtml) ...
... and Matt Weisner. see their theses at www.physics.niu.edu/physics/academic/grad/theses1.shtml) ...
Where are the First Stars now?
... A first striking effect is the bias towards earlier formation for stars which end up inside the cluster. Thus half the stars which lie within the final virial radius form before z = 4 while half the stars outside this radius form after z = 2. The first 1.5% of stars in cluster galaxies have already ...
... A first striking effect is the bias towards earlier formation for stars which end up inside the cluster. Thus half the stars which lie within the final virial radius form before z = 4 while half the stars outside this radius form after z = 2. The first 1.5% of stars in cluster galaxies have already ...
chapter19 - Empyrean Quest Publishers
... • What clues to our galaxy’s history do halo stars hold? • How did our galaxy form? ...
... • What clues to our galaxy’s history do halo stars hold? • How did our galaxy form? ...
Homework #8 - Leslie Looney
... What is it that makes the study of the structure of our own Galaxy more difficult than that of much more distant spiral galaxies? 1. The galactic center is visible only from the southern hemisphere, where, until recently, no major telescopes were available for the study of galactic structure. j 2. O ...
... What is it that makes the study of the structure of our own Galaxy more difficult than that of much more distant spiral galaxies? 1. The galactic center is visible only from the southern hemisphere, where, until recently, no major telescopes were available for the study of galactic structure. j 2. O ...
Lecture 18, Structure of spiral galaxies
... Stars: Halo vs. Disk • Stars in the disk are relatively young. • fraction of heavy elements same as or greater than the Sun • plenty of high and lowmass stars, blue and red • Stars in the halo are old. • fraction of heavy elements much less than the Sun • mostly lowmass, red stars • Stars in th ...
... Stars: Halo vs. Disk • Stars in the disk are relatively young. • fraction of heavy elements same as or greater than the Sun • plenty of high and lowmass stars, blue and red • Stars in the halo are old. • fraction of heavy elements much less than the Sun • mostly lowmass, red stars • Stars in th ...
Peculiar (Interacting) Galaxies
... formation, due to collisions between gas clouds. In addition • Gas which loses enough angular momentum during the encounter will fall into the center. (This is especially true if a bar is formed.) This can lead to strong nuclear starbursts. § M82 is currently forming a few M¤/year of stars (simila ...
... formation, due to collisions between gas clouds. In addition • Gas which loses enough angular momentum during the encounter will fall into the center. (This is especially true if a bar is formed.) This can lead to strong nuclear starbursts. § M82 is currently forming a few M¤/year of stars (simila ...
Chapter 15 Normal and Active Galaxies
... ellipticals of trillions of stars, down to dwarf ellipticals of less than a million stars. Ellipticals also contain very little, if any, cool gas and dust, and show no evidence of ongoing star formation. Many do, however, have large clouds of hot gas, extending far beyond the visible boundaries of t ...
... ellipticals of trillions of stars, down to dwarf ellipticals of less than a million stars. Ellipticals also contain very little, if any, cool gas and dust, and show no evidence of ongoing star formation. Many do, however, have large clouds of hot gas, extending far beyond the visible boundaries of t ...
From Cosmic Birth to Living Earth - Association of Universities for
... towards constructing a general purpose, long-life, space-based observatory that is capable of finding planets showing signs of life. Such an observatory would be able to survey hundreds of planetary systems and detect dozens of Earth-like planets in the habitable zones around their stars. It would a ...
... towards constructing a general purpose, long-life, space-based observatory that is capable of finding planets showing signs of life. Such an observatory would be able to survey hundreds of planetary systems and detect dozens of Earth-like planets in the habitable zones around their stars. It would a ...
Document
... Elliptical galaxies are affectionately called “E” galaxies. They can be extremely large and massive. This galaxy is 2 million light years across. The size of the Milky Way in comparison! ...
... Elliptical galaxies are affectionately called “E” galaxies. They can be extremely large and massive. This galaxy is 2 million light years across. The size of the Milky Way in comparison! ...
PX269 Galaxies - University of Warwick
... unfolding great and very wonderful sights and displaying to the gaze of everyone, but especially philosophers and astronomers, the things that were observed by GALILEO GALILEI, Florentine patrician and public mathematician of the University of Padua, with the help of a spyglass lately devised by him ...
... unfolding great and very wonderful sights and displaying to the gaze of everyone, but especially philosophers and astronomers, the things that were observed by GALILEO GALILEI, Florentine patrician and public mathematician of the University of Padua, with the help of a spyglass lately devised by him ...
In Far Off Distant Galaxies: Classification by Shape
... Object B is a spiral galaxy in the Virgo Cluster. It is disk shaped with arms. The two or more arms are visible due to dust lanes which block light. Object C is an elliptical galaxy in the Virgo Cluster. The brightness decreases uniformly from the central area. Elliptical galaxies contain no dust la ...
... Object B is a spiral galaxy in the Virgo Cluster. It is disk shaped with arms. The two or more arms are visible due to dust lanes which block light. Object C is an elliptical galaxy in the Virgo Cluster. The brightness decreases uniformly from the central area. Elliptical galaxies contain no dust la ...
Read the paragraph on the left side of the book
... 8. What kind of galaxy is the Milky Way galaxy????????? 9. Describe the shape of the Milky Way galaxy viewed from the side: 10. Describe the shape of the Milky Way galaxy viewed from the top: 11. What do we call the center of our milky way galaxy????? 12. Where is our sun and solar system located in ...
... 8. What kind of galaxy is the Milky Way galaxy????????? 9. Describe the shape of the Milky Way galaxy viewed from the side: 10. Describe the shape of the Milky Way galaxy viewed from the top: 11. What do we call the center of our milky way galaxy????? 12. Where is our sun and solar system located in ...
Ay 1 – Homework #6
... C. They are mostly dark-matter dominated. D. Over-densities created by spiral density waves (i.e. spiral arms) are necessary to create sites of star formation. 5. What is the physical significance of the Tully-Fisher relation for spiral galaxies? A. It implies a link between the dark matter halos of ...
... C. They are mostly dark-matter dominated. D. Over-densities created by spiral density waves (i.e. spiral arms) are necessary to create sites of star formation. 5. What is the physical significance of the Tully-Fisher relation for spiral galaxies? A. It implies a link between the dark matter halos of ...
The Milky Way Galaxy
... Because the gravitational field near a black hole would be so strong, any matter nearby would orbit very fast This hot material would radiate energy It would appear as an X-ray source ...
... Because the gravitational field near a black hole would be so strong, any matter nearby would orbit very fast This hot material would radiate energy It would appear as an X-ray source ...
Cosmic Castaways Scene Chart
... between the galaxies. If some stars can become cosmic Start with Sun/ SS pull back castaways, we have to wonder, can to Cox and Loeb Sequence our Sun, traveling within the Milky starting at “collision course”. Way galaxy, get lost to the voids as At the end of the sequence, well? Our Milky Way galax ...
... between the galaxies. If some stars can become cosmic Start with Sun/ SS pull back castaways, we have to wonder, can to Cox and Loeb Sequence our Sun, traveling within the Milky starting at “collision course”. Way galaxy, get lost to the voids as At the end of the sequence, well? Our Milky Way galax ...
Lecture 8 - University of Sydney
... Sometimes gas pools into the centre of the colliding system, resulting in a massive burst of star formation (more than 1000 new stars per year!) This burst produces masses of dust in supernovae, making the galaxy glow brightly in the infrared. ...
... Sometimes gas pools into the centre of the colliding system, resulting in a massive burst of star formation (more than 1000 new stars per year!) This burst produces masses of dust in supernovae, making the galaxy glow brightly in the infrared. ...
Document
... Sometimes gas pools into the centre of the colliding system, resulting in a massive burst of star formation (more than 1000 new stars per year!) This burst produces masses of dust in supernovae, making the galaxy glow brightly in the infrared. ...
... Sometimes gas pools into the centre of the colliding system, resulting in a massive burst of star formation (more than 1000 new stars per year!) This burst produces masses of dust in supernovae, making the galaxy glow brightly in the infrared. ...
Irregular galaxies
... – Believed the Sun is at the Center of the universe – Believed the Universe extends to `distant stars’ with an inferred distance of about 100 billion miles. The largest measured distance is from the Sun to Saturn at about 1 billion miles (886 million miles is actual distance). ...
... – Believed the Sun is at the Center of the universe – Believed the Universe extends to `distant stars’ with an inferred distance of about 100 billion miles. The largest measured distance is from the Sun to Saturn at about 1 billion miles (886 million miles is actual distance). ...
Galaxy - Cloudfront.net
... • Galaxies contain star clusters and multiple star systems • Put in categories base on their shape ...
... • Galaxies contain star clusters and multiple star systems • Put in categories base on their shape ...
Section 28.2 - CPO Science
... Astronomers classify galaxies according to their shape. 1. Spiral galaxies consist of a central, dense area surrounded by spiraling arms. 2. Barred spiral galaxies have a bar-shaped structure in the center. 3. Elliptical galaxies look like the central portion of a spiral galaxy without the arms. 4. ...
... Astronomers classify galaxies according to their shape. 1. Spiral galaxies consist of a central, dense area surrounded by spiraling arms. 2. Barred spiral galaxies have a bar-shaped structure in the center. 3. Elliptical galaxies look like the central portion of a spiral galaxy without the arms. 4. ...
*Death of the Sun* * Video Questions
... 2. Why can we not see the center of our galaxy with visible light? What type of light can be used to see the center of the galaxy? 3. What did Eric Becklin and his team of astronomers use to pinpoint the center of the Milky Way Galaxy? What did it allow them to do? 4. How many light years across is ...
... 2. Why can we not see the center of our galaxy with visible light? What type of light can be used to see the center of the galaxy? 3. What did Eric Becklin and his team of astronomers use to pinpoint the center of the Milky Way Galaxy? What did it allow them to do? 4. How many light years across is ...
The Milky Way`s Collision with the Andromeda Galaxy
... a nearby whirlpool of dust and gas around a newborn star, but its distance and relative motion to the Sun were unknown. A quarter of a century later, American astronomer Vesto Slipher determined the object’s velocity with respect to our solar system. He did this by measuring its Doppler shift, the d ...
... a nearby whirlpool of dust and gas around a newborn star, but its distance and relative motion to the Sun were unknown. A quarter of a century later, American astronomer Vesto Slipher determined the object’s velocity with respect to our solar system. He did this by measuring its Doppler shift, the d ...
Milky Way
The Milky Way is the galaxy that contains our Solar System. Its name ""milky"" is derived from its appearance as a dim glowing band arching across the night sky whose individual stars cannot be distinguished by the naked eye. The term ""Milky Way"" is a translation of the Latin via lactea, from the Greek γαλαξίας κύκλος (galaxías kýklos, ""milky circle""). From Earth the Milky Way appears as a band because its disk-shaped structure is viewed from within. Galileo Galilei first resolved the band of light into individual stars with his telescope in 1610. Until the early 1920s most astronomers thought that the Milky Way contained all the stars in the Universe. Following the 1920 Great Debate between the astronomers Harlow Shapley and Heber Curtis, observations by Edwin Hubble showed that the Milky Way is just one of many galaxies—now known to number in the billions.The Milky Way is a barred spiral galaxy that has a diameter usually considered to be roughly 100,000–120,000 light-years but may be 150,000–180,000 light-years. The Milky Way is estimated to contain 100–400 billion stars, although this number may be as high as one trillion. There are probably at least 100 billion planets in the Milky Way. The Solar System is located within the disk, about 27,000 light-years from the Galactic Center, on the inner edge of one of the spiral-shaped concentrations of gas and dust called the Orion Arm. The stars in the inner ≈10,000 light-years form a bulge and one or more bars that radiate from the bulge. The very center is marked by an intense radio source, named Sagittarius A*, which is likely to be a supermassive black hole.Stars and gases at a wide range of distances from the Galactic Center orbit at approximately 220 kilometers per second. The constant rotation speed contradicts the laws of Keplerian dynamics and suggests that much of the mass of the Milky Way does not emit or absorb electromagnetic radiation. This mass has been given the name ""dark matter"". The rotational period is about 240 million years at the position of the Sun. The Milky Way as a whole is moving at a velocity of approximately 600 km per second with respect to extragalactic frames of reference. The oldest stars in the Milky Way are nearly as old as the Universe itself and thus must have formed shortly after the Big Bang.The Milky Way has several satellite galaxies and is part of the Local Group of galaxies, which is a component of the Virgo Supercluster, which again is a component of the Laniakea Supercluster.