PDF - Amazing Space, STScI
... Peering into the crowded bulge of our Milky Way galaxy, Hubble looked farther than ever before to nab a group of planet candidates outside our solar system. Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a nar ...
... Peering into the crowded bulge of our Milky Way galaxy, Hubble looked farther than ever before to nab a group of planet candidates outside our solar system. Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a nar ...
Spectroscopic confirmation of a galaxy at redshift z=8.6
... Although we cannot derive the characteristics of the stellar population in UDFy-38135539, similarly selected galaxies at lower redshifts, z < 5–7, seem to be young (ages between 10 and 100 million years, Myr) and have both low metallicity and low extinction15–17. Plausible characteristics for the st ...
... Although we cannot derive the characteristics of the stellar population in UDFy-38135539, similarly selected galaxies at lower redshifts, z < 5–7, seem to be young (ages between 10 and 100 million years, Myr) and have both low metallicity and low extinction15–17. Plausible characteristics for the st ...
Chapter 15
... center of the Milky Way, the mass of the central black hole could be determined to ~ 2.6 million solar masses ...
... center of the Milky Way, the mass of the central black hole could be determined to ~ 2.6 million solar masses ...
Astro-MilkyWay
... center of the Milky Way, the mass of the central black hole could be determined to ~ 2.6 million solar masses ...
... center of the Milky Way, the mass of the central black hole could be determined to ~ 2.6 million solar masses ...
The Milky Way
... center of the Milky Way, the mass of the central black hole could be determined to ~ 3 million solar masses ...
... center of the Milky Way, the mass of the central black hole could be determined to ~ 3 million solar masses ...
–1– 2. Milky Way We know a great deal, perhaps more than any
... • Herschel (1785) used star counts to infer a flattened distribution for the MW. • A similar, but much larger survey of nearby stars was done by Kapteyn around 1920. He used parallax, proper motions, radial velocities and spectra to infer the distance to stars. He inferred that the size of the MW is ...
... • Herschel (1785) used star counts to infer a flattened distribution for the MW. • A similar, but much larger survey of nearby stars was done by Kapteyn around 1920. He used parallax, proper motions, radial velocities and spectra to infer the distance to stars. He inferred that the size of the MW is ...
b) How to Create Large Disks despite Major Mergers
... II. What we Learn a) The Creation of a Bulgeless Disk Galaxy with a Dark Matter “Core” b) How to Create Large Disks despite Major Mergers ...
... II. What we Learn a) The Creation of a Bulgeless Disk Galaxy with a Dark Matter “Core” b) How to Create Large Disks despite Major Mergers ...
question - UW Canvas
... a. The locations or coordinates on the celestial sphere where the clusters are located. b. How fast each cluster is moving relative to Earth; i.e., spectral redshifts or blueshifts. c. The value of Hubble’s constant by fitting a slope to the main sequence. d. The approximate masses of main sequence ...
... a. The locations or coordinates on the celestial sphere where the clusters are located. b. How fast each cluster is moving relative to Earth; i.e., spectral redshifts or blueshifts. c. The value of Hubble’s constant by fitting a slope to the main sequence. d. The approximate masses of main sequence ...
TAP 704- 8: The ladder of astronomical distances
... With parallax measurements to nearby Cepheids from the Hipparcos satellite, and with the Hubble telescope just recently able to detect Cepheid variables as far away as the Virgo cluster (tens of millions of light-years), it turns out that Henrietta Leavitt identified one of the strongest and longest ...
... With parallax measurements to nearby Cepheids from the Hipparcos satellite, and with the Hubble telescope just recently able to detect Cepheid variables as far away as the Virgo cluster (tens of millions of light-years), it turns out that Henrietta Leavitt identified one of the strongest and longest ...
Nebulae
... classified as nebulae, because they looked like fuzzy “blobs”. Today we know galaxies are collections of billions of stars. We will limit our nebulae to clouds of gas floating in space. ...
... classified as nebulae, because they looked like fuzzy “blobs”. Today we know galaxies are collections of billions of stars. We will limit our nebulae to clouds of gas floating in space. ...
Cartwheel Galaxy - Chandra X
... 8. Is there an X-ray candidate for an active galactic nucleus (AGN) in Arp 147? Explain. 9. Why might there not be new star formation in the elliptical galaxy on the left? 10. A study of ULXs has determined that very few X-ray sources with luminosity greater than 1040 erg s−1 remain after ~15 Myr a ...
... 8. Is there an X-ray candidate for an active galactic nucleus (AGN) in Arp 147? Explain. 9. Why might there not be new star formation in the elliptical galaxy on the left? 10. A study of ULXs has determined that very few X-ray sources with luminosity greater than 1040 erg s−1 remain after ~15 Myr a ...
The Milky Way
... Why can't we see visible radiation from the central region of the galaxy? 1. No visible light is emitted by the central region of the galaxy. 2. Interstellar dust blocks our view. 3. Too many stars are in the way. 4. Gravity curves the light away from the earth and Sun. ...
... Why can't we see visible radiation from the central region of the galaxy? 1. No visible light is emitted by the central region of the galaxy. 2. Interstellar dust blocks our view. 3. Too many stars are in the way. 4. Gravity curves the light away from the earth and Sun. ...
dark matter - University of Texas Astronomy Home Page
... stars, dense part of galaxy, supermassive black hole at the center. ...
... stars, dense part of galaxy, supermassive black hole at the center. ...
DTU_9e_ch15
... The Shapley–Curtis debate was the first major public discussion between astronomers as to whether the Milky Way contains all the stars in the universe. Cepheid variable stars are important in determining the distance to other galaxies. Edwin Hubble proved that there are other galaxies far outside of ...
... The Shapley–Curtis debate was the first major public discussion between astronomers as to whether the Milky Way contains all the stars in the universe. Cepheid variable stars are important in determining the distance to other galaxies. Edwin Hubble proved that there are other galaxies far outside of ...
20 pm - Starmap
... A faint spiral galaxy in the Virgo Cluster. Nice bluish color with a bright yellow core. ...
... A faint spiral galaxy in the Virgo Cluster. Nice bluish color with a bright yellow core. ...
Extragalactic Astrophysics 1 AA 2011-2012 Prof. LA Antonelli
... grow in regions of higher density ...
... grow in regions of higher density ...
Question 1
... The location of the Galactic center was identified early in the 20th century using a) supernova remnants. b) white dwarf stars in the spiral arms. c) red giant variable stars in globular clusters. d) bright O and B stars in open clusters. e) X-ray sources. Explanation: Harlow Shapley used pulsating ...
... The location of the Galactic center was identified early in the 20th century using a) supernova remnants. b) white dwarf stars in the spiral arms. c) red giant variable stars in globular clusters. d) bright O and B stars in open clusters. e) X-ray sources. Explanation: Harlow Shapley used pulsating ...
US - Real Science
... Around one quarter of all large stars are born in starburst galaxies such as this. They spawn stars up to a thousand times faster than the Milky Way. In most starbursts the surge in starbirth is triggered when two galaxies come too close together. Mutual attraction between the galaxies causes immens ...
... Around one quarter of all large stars are born in starburst galaxies such as this. They spawn stars up to a thousand times faster than the Milky Way. In most starbursts the surge in starbirth is triggered when two galaxies come too close together. Mutual attraction between the galaxies causes immens ...
astronomy advisory panel strategy
... (e-MERLIN, SKA – mapping HI from reionisation to the present). Underlying the push to observe normal galaxies throughout their lives will be studies of comparator nearby galaxies and extensive theoretical modelling of galactic evolution. Wide-field surveys will generate the huge samples needed for s ...
... (e-MERLIN, SKA – mapping HI from reionisation to the present). Underlying the push to observe normal galaxies throughout their lives will be studies of comparator nearby galaxies and extensive theoretical modelling of galactic evolution. Wide-field surveys will generate the huge samples needed for s ...
Galaxy / Cluster Ecosystem Ming Sun (University of Alabama in Huntsville)
... Coronae survived for many cluster galaxies, esp. massive ones (e.g., > 60 % for L > 2 L* galaxies); they are metal rich ( ~ solar) and hotter than stars (spec = 0.3 – 1.1). Origin: a) galactic cool cores (stellar mass loss); b) remnants of large cool cores after stripping or AGN heating? Embedded c ...
... Coronae survived for many cluster galaxies, esp. massive ones (e.g., > 60 % for L > 2 L* galaxies); they are metal rich ( ~ solar) and hotter than stars (spec = 0.3 – 1.1). Origin: a) galactic cool cores (stellar mass loss); b) remnants of large cool cores after stripping or AGN heating? Embedded c ...
Chapter 31
... showed that they were much too far away to be located in our own galaxy and it became known as the Andromeda Galaxy. ...
... showed that they were much too far away to be located in our own galaxy and it became known as the Andromeda Galaxy. ...
powerpoint - Physics @ IUPUI
... even virtually nothing. • As we will find, we can still find out a lot about our universe by looking at areas where there is very little. • The moral of the story is to never (in either life or Astronomy) take anything forgranted. ...
... even virtually nothing. • As we will find, we can still find out a lot about our universe by looking at areas where there is very little. • The moral of the story is to never (in either life or Astronomy) take anything forgranted. ...
The star Betelgeuse is about 500 light years away from us. If this star
... d) slightly less than e) much less than What causes light from a star to be Doppler-shifted? a) the distance between us and the star b) the gas and dust between us and the star c) the speed of the star toward or away from us d) temperature differences between us and the star e) the change in the spe ...
... d) slightly less than e) much less than What causes light from a star to be Doppler-shifted? a) the distance between us and the star b) the gas and dust between us and the star c) the speed of the star toward or away from us d) temperature differences between us and the star e) the change in the spe ...
Rotation Curves:
... • Does the TF make sense?? For a circular orbit, the rotational velocity is caused by the gravitational forces of the mass interior to the orbit. (This also follows from the Virial theorem.) – V2 = GM(r)/r (yes, we’ve been here before!), thus M(r) # rV2 – Assume that all galaxies have the same M/L ( ...
... • Does the TF make sense?? For a circular orbit, the rotational velocity is caused by the gravitational forces of the mass interior to the orbit. (This also follows from the Virial theorem.) – V2 = GM(r)/r (yes, we’ve been here before!), thus M(r) # rV2 – Assume that all galaxies have the same M/L ( ...
Galaxy
.jpg?width=300)
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.