Galaxy
... revolving around a star In 2000, astronomers discovered a solar system about 10.5 light-years away with planets similar to our solar system ...
... revolving around a star In 2000, astronomers discovered a solar system about 10.5 light-years away with planets similar to our solar system ...
Galaxies
... clusters of galaxies? – Masses measured from galaxy motions, temperature of hot gas, and gravitational lensing all indicate that the vast majority of matter in clusters is dark ...
... clusters of galaxies? – Masses measured from galaxy motions, temperature of hot gas, and gravitational lensing all indicate that the vast majority of matter in clusters is dark ...
main characteristics of the emission from elliptical galaxies
... galaxies. So, as they are fairly transparent objects, the stellar component represents the dominant emission feature of these systems, together with a halo of extremely hot gas detectable only in X-rays. nosity central region, the ...
... galaxies. So, as they are fairly transparent objects, the stellar component represents the dominant emission feature of these systems, together with a halo of extremely hot gas detectable only in X-rays. nosity central region, the ...
2.3 Peculiar galaxies
... The energy is gained more gradually. As each layer of the disc slips downwards, half of the gained gravitational energy goes towards speeding up the rotation; the other half goes into heating up the gas, so finally we get radiation. The temperature we expect is about 105 K, just right for explaining ...
... The energy is gained more gradually. As each layer of the disc slips downwards, half of the gained gravitational energy goes towards speeding up the rotation; the other half goes into heating up the gas, so finally we get radiation. The temperature we expect is about 105 K, just right for explaining ...
Galaxies have different sizes and shapes.
... The disk of the Milky Way measures The Milky Way is about 100,000 light-years in diameter. more than 100,000 light-years in diameter. The bulge of densely packed stars at the center is located about 26,000 light-years from the Sun. A large but very faint layer of stars surrounds the disk and bulge. ...
... The disk of the Milky Way measures The Milky Way is about 100,000 light-years in diameter. more than 100,000 light-years in diameter. The bulge of densely packed stars at the center is located about 26,000 light-years from the Sun. A large but very faint layer of stars surrounds the disk and bulge. ...
globular cluster - Harding University
... distances to a number of these galaxies using Cepheid variable stars and noticed a correlation between the distance to the galaxies and the observed red–shift of the spectrum. He found that the farther away a galaxy was, the greater the red-shift. ...
... distances to a number of these galaxies using Cepheid variable stars and noticed a correlation between the distance to the galaxies and the observed red–shift of the spectrum. He found that the farther away a galaxy was, the greater the red-shift. ...
Ch. 25 - UTK Department of Physics and Astronomy
... the use of instructors in teaching their courses and assessing student learning. Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permitted. The work and materials from it should never be made available to students exc ...
... the use of instructors in teaching their courses and assessing student learning. Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permitted. The work and materials from it should never be made available to students exc ...
Galaxies - cloudfront.net
... reddish to yellowish in color because they are old stars. Most elliptical galaxies contain very little gas and dust because these particles have already formed into stars. • Irregular galaxies are neither elliptical nor spiral in shape. Most irregular galaxies were once spiral or elliptical galaxies ...
... reddish to yellowish in color because they are old stars. Most elliptical galaxies contain very little gas and dust because these particles have already formed into stars. • Irregular galaxies are neither elliptical nor spiral in shape. Most irregular galaxies were once spiral or elliptical galaxies ...
Measuring Distances - Stockton University
... one of the key discoveries in establishing the nature of galaxies which many had thought until that point to be part of our own Galaxy. • Cepheids continue to be one of the cornerstones of astronomy today. ...
... one of the key discoveries in establishing the nature of galaxies which many had thought until that point to be part of our own Galaxy. • Cepheids continue to be one of the cornerstones of astronomy today. ...
solar.gmu.edu
... •A quasar’s luminosity can be calculated from its apparent brightness and the distance using the inverse-square law •Even though small, the luminosity of a quasar (1038 to 1042 Watts) can be very larger, i.e., several thousand times more than the entire Milly Way Galaxies (1037). •A quasar has emiss ...
... •A quasar’s luminosity can be calculated from its apparent brightness and the distance using the inverse-square law •Even though small, the luminosity of a quasar (1038 to 1042 Watts) can be very larger, i.e., several thousand times more than the entire Milly Way Galaxies (1037). •A quasar has emiss ...
Active Galactic Nuclei: are they important?
... are they important? Bożena Czerny Copernicus Astronomical Center Warsaw ...
... are they important? Bożena Czerny Copernicus Astronomical Center Warsaw ...
Class 28 (Jun 2) - Physics at Oregon State University
... Distances to other galaxies • We can use Cepheid variable stars to measure the distance to other galaxies. • A Cepheid’s luminosity is proportional to its period, so if we know how rapidly it brightens and dims, we know much energy it emits. • If we see a Cepheid in another galaxy, we measure its p ...
... Distances to other galaxies • We can use Cepheid variable stars to measure the distance to other galaxies. • A Cepheid’s luminosity is proportional to its period, so if we know how rapidly it brightens and dims, we know much energy it emits. • If we see a Cepheid in another galaxy, we measure its p ...
CosmologyL1
... satellite, shows the furthest light we can see. It is also the oldest: The light was emitted shortly after the Big Bang, and has been traveling through space for 13.7 billion years to us. In this "baby picture" of the universe, the red and yellow patches are regions that are just a few millionths of ...
... satellite, shows the furthest light we can see. It is also the oldest: The light was emitted shortly after the Big Bang, and has been traveling through space for 13.7 billion years to us. In this "baby picture" of the universe, the red and yellow patches are regions that are just a few millionths of ...
Lecture Eleven (Powerpoint format)
... Bang model, constructed a catalog of “unusual” galaxies in the 1960s. This catalog is now understood to be an excellent source of galaxies which have undergone collisions in recent cosmic history. The tidal tails seen in Arp 188 (located four hundred million light years from the Earth) kin this ...
... Bang model, constructed a catalog of “unusual” galaxies in the 1960s. This catalog is now understood to be an excellent source of galaxies which have undergone collisions in recent cosmic history. The tidal tails seen in Arp 188 (located four hundred million light years from the Earth) kin this ...
Groups of Stars
... Irregular galaxies come in many shapes, are typically smaller than other types of galaxies, and are often located near larger galaxies. ...
... Irregular galaxies come in many shapes, are typically smaller than other types of galaxies, and are often located near larger galaxies. ...
Systematics of Galaxy Properties and Scaling Relations Ay 127
... relative distances of galaxies and peculiar velocities: thus, it is really important to understand their intrinsic limitations of accuracy, e.g., environmental dependences ...
... relative distances of galaxies and peculiar velocities: thus, it is really important to understand their intrinsic limitations of accuracy, e.g., environmental dependences ...
Active Galactic Nuclei
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
Slide 1
... Star forming regions and interstellar medium physics in Milky Way and external galaxies Molecular chemistry of cometary, planetary and satellite atmospheres in solar system ...
... Star forming regions and interstellar medium physics in Milky Way and external galaxies Molecular chemistry of cometary, planetary and satellite atmospheres in solar system ...
Interacting Galaxies
... Far from being solitary and isolated island universes, many galaxies are found to be interacting. Their close encounters can lead to spectacular mergers and spawn vast amounts of new star formation. Astronomers estimate that in the nearby universe, 1 out of every 20 gas-rich disk galaxies, like our ...
... Far from being solitary and isolated island universes, many galaxies are found to be interacting. Their close encounters can lead to spectacular mergers and spawn vast amounts of new star formation. Astronomers estimate that in the nearby universe, 1 out of every 20 gas-rich disk galaxies, like our ...
Lecture Eleven (Powerpoint format)
... Intringued, Thorne picked up the wormhole problem over the next several years and began pursuing it as an active research project. Inspired by his bold lead on such a far-out topic, other well-known scientists like Stephen Hawking and Igor Novikov also published work on wormhole theory. ...
... Intringued, Thorne picked up the wormhole problem over the next several years and began pursuing it as an active research project. Inspired by his bold lead on such a far-out topic, other well-known scientists like Stephen Hawking and Igor Novikov also published work on wormhole theory. ...
Research proposal uploaded for ESO fellowship
... Currently, toy models are used to treat supernova feedback, which are parametrized to reproduce the faint-end of the luminosity function (Cole et al. 2000; Guo et al. 2010). These toy models do not take into account key physical conditions, such as the density of the ISM of galaxies or how much ener ...
... Currently, toy models are used to treat supernova feedback, which are parametrized to reproduce the faint-end of the luminosity function (Cole et al. 2000; Guo et al. 2010). These toy models do not take into account key physical conditions, such as the density of the ISM of galaxies or how much ener ...
Galaxies and the Universe bb
... have supermassive black holes at their centers. • These black holes seem to be ________ active galactic nuclei. • All galaxies may have passed through a quasarlike stage earlier in time. ...
... have supermassive black holes at their centers. • These black holes seem to be ________ active galactic nuclei. • All galaxies may have passed through a quasarlike stage earlier in time. ...
Astro 6590: Galaxies and the Universe Astro
... If we select a star at random in the universe, it would nearly always be possible to identify its parent galaxy with significant confidence. The same is not true of galaxies and “parent” groups of galaxies. Virial Theorem: ...
... If we select a star at random in the universe, it would nearly always be possible to identify its parent galaxy with significant confidence. The same is not true of galaxies and “parent” groups of galaxies. Virial Theorem: ...
Galaxies
... This is M31, the Andromeda galaxy. The light has taken 2.2 million years to get to us and is 200,000 light years across! It was named ‘little cloud’ by the Persian astronomer Abdal-Rahman-al-Sufi in 964 AD and is one of the local group of galaxies. ...
... This is M31, the Andromeda galaxy. The light has taken 2.2 million years to get to us and is 200,000 light years across! It was named ‘little cloud’ by the Persian astronomer Abdal-Rahman-al-Sufi in 964 AD and is one of the local group of galaxies. ...
chapter 26 instructor notes
... stars. Larson and Tinsley (1972) argued that the tidal interaction with another galaxy has induced star formation, although the resulting excess luminosity is hidden behind obscuring clouds of gas and dust. Such galaxies are bright at infrared wavelengths, however. Although the starburst activity wa ...
... stars. Larson and Tinsley (1972) argued that the tidal interaction with another galaxy has induced star formation, although the resulting excess luminosity is hidden behind obscuring clouds of gas and dust. Such galaxies are bright at infrared wavelengths, however. Although the starburst activity wa ...
Pea galaxy
A Pea galaxy, also referred to as a Pea or Green Pea, might be a type of Luminous Blue Compact Galaxy which is undergoing very high rates of star formation. Pea galaxies are so-named because of their small size and greenish appearance in the images taken by the Sloan Digital Sky Survey (SDSS).Pea Galaxies were first discovered in 2007 by the volunteer users within the forum section of the online astronomy project Galaxy Zoo (GZ).