Virgo constellation
... will see Virgo’s ear of grain, Spica. It looks like one star, but actually is a binary star with both stars larger and hotter than our sun. Their mutual gravity distorts each star into an egg shape, with the pointed ends facing each other as they whirl around completing a single orbit in four days. ...
... will see Virgo’s ear of grain, Spica. It looks like one star, but actually is a binary star with both stars larger and hotter than our sun. Their mutual gravity distorts each star into an egg shape, with the pointed ends facing each other as they whirl around completing a single orbit in four days. ...
Searching for Dwarf Galaxies and Population III Star
... at early times are volumes that have been ionized by flux from nearby, bright galaxies or proto-clusters of galaxies. This project is a search for tiny, star-forming dwarf galaxies in regions around very luminous star-forming galaxies at z~7.7 discovered by the James Webb Space Telescope. The projec ...
... at early times are volumes that have been ionized by flux from nearby, bright galaxies or proto-clusters of galaxies. This project is a search for tiny, star-forming dwarf galaxies in regions around very luminous star-forming galaxies at z~7.7 discovered by the James Webb Space Telescope. The projec ...
Link again
... Nearby galaxies are moving away from us slowly and distant galaxies are moving away from us much more quickly. The Hubble Law is state in a formula that contains a constant. This constant gives the rate at which the universe is expanding and its age. Galaxies are found in clusters. Clusters that are ...
... Nearby galaxies are moving away from us slowly and distant galaxies are moving away from us much more quickly. The Hubble Law is state in a formula that contains a constant. This constant gives the rate at which the universe is expanding and its age. Galaxies are found in clusters. Clusters that are ...
Astronomy
... Nearby galaxies are moving away from us slowly and distant galaxies are moving away from us much more quickly. The Hubble Law is state in a formula that contains a constant. This constant gives the rate at which the universe is expanding and its age. Galaxies are found in clusters. Clusters that are ...
... Nearby galaxies are moving away from us slowly and distant galaxies are moving away from us much more quickly. The Hubble Law is state in a formula that contains a constant. This constant gives the rate at which the universe is expanding and its age. Galaxies are found in clusters. Clusters that are ...
19 The Milky Way Galaxy
... Structure of the Milky Way 1. Select bright objects that you can see throughout the Milky Way and trace their directions and distances. 2. Observe objects at radio and infrared wavelengths to circumvent the problem of optical obscuration, and catalog their directions and distances. 3. Trace the orbi ...
... Structure of the Milky Way 1. Select bright objects that you can see throughout the Milky Way and trace their directions and distances. 2. Observe objects at radio and infrared wavelengths to circumvent the problem of optical obscuration, and catalog their directions and distances. 3. Trace the orbi ...
Set 2: Nature of Galaxies
... • History: as late as the early 1920’s it was not known that the “spiral nebula” were galaxies like ours • Debate between Shapley (galactic objects) and Curtis (extragalactic, or galaxies) in 1920 highlighted the difficulties distances in astrophysics difficult to measure - Shapley’s inferences base ...
... • History: as late as the early 1920’s it was not known that the “spiral nebula” were galaxies like ours • Debate between Shapley (galactic objects) and Curtis (extragalactic, or galaxies) in 1920 highlighted the difficulties distances in astrophysics difficult to measure - Shapley’s inferences base ...
The Milky Way Galaxy
... To determine the rotation curve of the Galaxy, we will introduce a more convenient coordinate system, called the Galactic coordinate system. Note that the plane of the solar system is not the same as the plane of the Milky Way disk, and the Earth itself is tipped with respect to the plane of the sol ...
... To determine the rotation curve of the Galaxy, we will introduce a more convenient coordinate system, called the Galactic coordinate system. Note that the plane of the solar system is not the same as the plane of the Milky Way disk, and the Earth itself is tipped with respect to the plane of the sol ...
Today`s Powerpoint
... Halo: stars and globular clusters swarm around center of Milky Way. Very elliptical orbits with random orientations. They also cross the disk. Bulge: similar to halo. Disk: rotates. ...
... Halo: stars and globular clusters swarm around center of Milky Way. Very elliptical orbits with random orientations. They also cross the disk. Bulge: similar to halo. Disk: rotates. ...
D109-08x
... apart as it races at 4.5 million miles per hour through the heart of a distant cluster of galaxies. The images, taken over several wavelengths, provide evidence of the "galactic assault and battery," namely, gas being stripped from the doomed galaxy, called C153. The composite photograph at left was ...
... apart as it races at 4.5 million miles per hour through the heart of a distant cluster of galaxies. The images, taken over several wavelengths, provide evidence of the "galactic assault and battery," namely, gas being stripped from the doomed galaxy, called C153. The composite photograph at left was ...
File
... spiral galaxy is spherical. Younger stars are more likely found in the arms of the spiral, and older stars are most likely found in the center sphere. Scientists believe that the center of all spiral galaxies contains a massive black hole, an extremely dense area from which light cannot escape. Our ...
... spiral galaxy is spherical. Younger stars are more likely found in the arms of the spiral, and older stars are most likely found in the center sphere. Scientists believe that the center of all spiral galaxies contains a massive black hole, an extremely dense area from which light cannot escape. Our ...
ppt
... Previously… on Origins: Is Earth a special/unique place? • What does the question mean? • How do we find planets? • What are habitable planets? ...
... Previously… on Origins: Is Earth a special/unique place? • What does the question mean? • How do we find planets? • What are habitable planets? ...
T Einstein’s Mirage Paul L. Schechter
... to be a close pair of virtually identical quasars was observed. Quasars are very bright distant sources, so light from them sometimes passes near galaxies on its way to us. The suspicion that they were the multiple images of a single quasar expected for a gravitational mirage was confirmed Perhaps t ...
... to be a close pair of virtually identical quasars was observed. Quasars are very bright distant sources, so light from them sometimes passes near galaxies on its way to us. The suspicion that they were the multiple images of a single quasar expected for a gravitational mirage was confirmed Perhaps t ...
Final review - Physics and Astronomy
... (old stars to a lesser extent) Disk not empty between arms, just less material there. ...
... (old stars to a lesser extent) Disk not empty between arms, just less material there. ...
Early Spring Observing – Millstone News Night Sky
... Messier Object M3 - Globular Cluster in Canes Venatici. 1/2 million stars in a sphere 200 light years in diameter Distance: 33000 light Years-image courtesy P. Browne, Spring 2014 Note: Globular clusters are distributed in a halo around our galaxy: Globular clusters are normally associated with a h ...
... Messier Object M3 - Globular Cluster in Canes Venatici. 1/2 million stars in a sphere 200 light years in diameter Distance: 33000 light Years-image courtesy P. Browne, Spring 2014 Note: Globular clusters are distributed in a halo around our galaxy: Globular clusters are normally associated with a h ...
Galaxy Evolution
... plane perpendicular to J: it forms a flat disk! • the gas in the disk is denser than if it had retained its near spherical shape, so it is more efficient at cooling and making stars. • we get a spiral galaxy! ...
... plane perpendicular to J: it forms a flat disk! • the gas in the disk is denser than if it had retained its near spherical shape, so it is more efficient at cooling and making stars. • we get a spiral galaxy! ...
An introduce of the spectrograph of the GALEX
... that the number and total stellar mass of blue galaxies have been substantially constant since z~1, whereas those of red galaxies (near L*) have been significantly rising. To explain the new red galaxies, a ``mixed'' scenario is proposed in which star formation in blue cloud galaxies is quenched, ca ...
... that the number and total stellar mass of blue galaxies have been substantially constant since z~1, whereas those of red galaxies (near L*) have been significantly rising. To explain the new red galaxies, a ``mixed'' scenario is proposed in which star formation in blue cloud galaxies is quenched, ca ...
1.1 Fundamental Observers
... optically thick to photons, will remain fundamentally inaccessible to us until we develop alternative astronomies based on the detection of neutrinos ...
... optically thick to photons, will remain fundamentally inaccessible to us until we develop alternative astronomies based on the detection of neutrinos ...
Week8Lecture1
... Finding the Galactic Center How to Find the Galactic Center 1) Locate globular clusters in the halo 2) Determine distances to globular clusters using variable stars in the clusters 3) Find center of globular cluster distribution; this is the Galactic center Our Sun is ~28,000 lt-yrs from the Galact ...
... Finding the Galactic Center How to Find the Galactic Center 1) Locate globular clusters in the halo 2) Determine distances to globular clusters using variable stars in the clusters 3) Find center of globular cluster distribution; this is the Galactic center Our Sun is ~28,000 lt-yrs from the Galact ...
Searching for stars in high-velocity clouds
... does not rule out the scenario proposed by Braun & Burton (1999) and Blitz et al. (1999), but it does rule out HVCs being of the same class of object as the other known dwarf galaxies. If extragalactic then for some reason these H I clouds, unlike other dwarf galaxies, have not formed many (if any) ...
... does not rule out the scenario proposed by Braun & Burton (1999) and Blitz et al. (1999), but it does rule out HVCs being of the same class of object as the other known dwarf galaxies. If extragalactic then for some reason these H I clouds, unlike other dwarf galaxies, have not formed many (if any) ...
Some Examples of Virtual Observatory Enabled Science What Are the Some Distinguishing
... • Typically a few Mpc across, contain ~ 100 - 1000 luminous galaxies and many more dwarfs, masses ~ 1014 - 1015 M! • Gravitationally bound, but may not be fully virialized • Filled with hot X-ray gas, mass of the gas may exceed the mass of stars in cluster galaxies • Dark matter is the dominant mass ...
... • Typically a few Mpc across, contain ~ 100 - 1000 luminous galaxies and many more dwarfs, masses ~ 1014 - 1015 M! • Gravitationally bound, but may not be fully virialized • Filled with hot X-ray gas, mass of the gas may exceed the mass of stars in cluster galaxies • Dark matter is the dominant mass ...
astro704_final - Department of Physics and Astronomy
... of baryonic haloes and disks are constant in time, until a merger occurs • But...we observe galaxies, especially dwarfs like the Magellanic clouds, whose cores are less centrally concentrated than would be predicted by this model, or by NFW CDM halo profiles. • Reference model does not include disk ...
... of baryonic haloes and disks are constant in time, until a merger occurs • But...we observe galaxies, especially dwarfs like the Magellanic clouds, whose cores are less centrally concentrated than would be predicted by this model, or by NFW CDM halo profiles. • Reference model does not include disk ...
Training
... majestic spiral galaxy NGC 4414 was imaged by the Hubble Space Telescope as part of the HST Key Project on the Extragalactic Distance Scale. An international team of astronomers, led by Dr. Wendy Freedman of the Observatories of the Carnegie Institution of Washington, observed this galaxy on 13 diff ...
... majestic spiral galaxy NGC 4414 was imaged by the Hubble Space Telescope as part of the HST Key Project on the Extragalactic Distance Scale. An international team of astronomers, led by Dr. Wendy Freedman of the Observatories of the Carnegie Institution of Washington, observed this galaxy on 13 diff ...
Document
... • The gravitational formation of large scale structure is dominated by dark matter • Ordinary matter forms the stars, galaxies, and intergalactic gas. It is what we see. • As the universe expands and the matter density drops, dark energy is increasingly taking over and causing the expansion to accel ...
... • The gravitational formation of large scale structure is dominated by dark matter • Ordinary matter forms the stars, galaxies, and intergalactic gas. It is what we see. • As the universe expands and the matter density drops, dark energy is increasingly taking over and causing the expansion to accel ...
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.