Universe 8e Lecture Chapter 24 Galaxies
... Hot intergalactic gases in rich clusters account for a small part of the unobserved mass. These gases are detected by their X-ray emission. The remaining unobserved mass is probably in the form of dark-matter halos that surround the galaxies in these clusters. Gravitational lensing of remote galaxie ...
... Hot intergalactic gases in rich clusters account for a small part of the unobserved mass. These gases are detected by their X-ray emission. The remaining unobserved mass is probably in the form of dark-matter halos that surround the galaxies in these clusters. Gravitational lensing of remote galaxie ...
Measuring Distances - Stockton University
... Due to the spin of the galaxy, an observer will see part of the galaxy approaching them and part of the galaxy running away. This causes the emission from the galaxy to show redshifted, blueshifted, and no-shifted emission. The motion will thus cause a narrow line, e.g., a line due to some element l ...
... Due to the spin of the galaxy, an observer will see part of the galaxy approaching them and part of the galaxy running away. This causes the emission from the galaxy to show redshifted, blueshifted, and no-shifted emission. The motion will thus cause a narrow line, e.g., a line due to some element l ...
printer-friendly sample test questions
... 1st Item Specification: Recognize the red shift effect and know that the most distant objects have the greatest degree of red shift. Depth of Knowledge Level 1 1. The expansion of the universe was first deduced from A. Edwin Hubble showing that more distant galaxies are moving away more rapidly. B. ...
... 1st Item Specification: Recognize the red shift effect and know that the most distant objects have the greatest degree of red shift. Depth of Knowledge Level 1 1. The expansion of the universe was first deduced from A. Edwin Hubble showing that more distant galaxies are moving away more rapidly. B. ...
HST Key Project to Measure the Hubble Constant from
... – The resolution of stars in galaxies is distance dependent – Elliptical or spirals with prominent bulges – Normalizing to the mean total flux and correcting for an observed color dependence, relative distances to galaxies can be measured – Intrinsic scatter factor of 3 improvement to T-F or F-Plane ...
... – The resolution of stars in galaxies is distance dependent – Elliptical or spirals with prominent bulges – Normalizing to the mean total flux and correcting for an observed color dependence, relative distances to galaxies can be measured – Intrinsic scatter factor of 3 improvement to T-F or F-Plane ...
Lecture Notes – Galaxies
... Discovered in the 1940s by Carl Seyfert and appear as normal spirals but with very bright nuclei and emit strong non-thermal spectrum. The visible spectrum contains broad (5 000–10 000 km/s) emission lines indicating clouds of gas moving at very high speeds in the nucleus of the galaxy. 1% of spiral ...
... Discovered in the 1940s by Carl Seyfert and appear as normal spirals but with very bright nuclei and emit strong non-thermal spectrum. The visible spectrum contains broad (5 000–10 000 km/s) emission lines indicating clouds of gas moving at very high speeds in the nucleus of the galaxy. 1% of spiral ...
stars & galaxies
... Have no particular shape. Tend to be smaller and fainter than other galaxies. Could be formed from the collision of two different galaxies. Stars are of low mass and cannot organize into a pattern. Irregular galaxies are unevenly distributed throughout the universe. ...
... Have no particular shape. Tend to be smaller and fainter than other galaxies. Could be formed from the collision of two different galaxies. Stars are of low mass and cannot organize into a pattern. Irregular galaxies are unevenly distributed throughout the universe. ...
It is only in the past few years that humanity... limits of the heliosphere. A fortunate confluence of missions has... 1. Magnetic Effects in the Heliosheath and Astrosheaths (Prof. Merav...
... Recent evidence suggests that at a given color or spectral type, magnetically active, low-mass stars may be more luminous than their inactive counterparts. The increase in luminosity could simply be due to spots on the surface making stars appear colder than their fundamental parameters would predic ...
... Recent evidence suggests that at a given color or spectral type, magnetically active, low-mass stars may be more luminous than their inactive counterparts. The increase in luminosity could simply be due to spots on the surface making stars appear colder than their fundamental parameters would predic ...
Integrative Studies 410 Our Place in the Universe
... • Measured the distance to Andromeda to be 1 million Ly (modern value: 2.2 mill. Ly) • Conclusion: it is 20 times more distant than the milky way’s radius Extragalacticity! Shapley’s theory falsified! ...
... • Measured the distance to Andromeda to be 1 million Ly (modern value: 2.2 mill. Ly) • Conclusion: it is 20 times more distant than the milky way’s radius Extragalacticity! Shapley’s theory falsified! ...
Galaxies - senwiki
... that nothing, not even light, can escape. -Why? Black holes have extremely strong gravitational pulls. They can pull in stars and accumulate the mass of the stars. -Where are black holes located? Astronomers believe that each galaxy contains at least one supermassive black hole at its centre. ...
... that nothing, not even light, can escape. -Why? Black holes have extremely strong gravitational pulls. They can pull in stars and accumulate the mass of the stars. -Where are black holes located? Astronomers believe that each galaxy contains at least one supermassive black hole at its centre. ...
The Stars
... There are more stars in the sky than anyone can easily count, but they are not scattered evenly, and they are not all the same in brightness or color. By the end of the 5th grade, students should know that The patterns of stars in the sky stay the same, although they appear to move across the sk ...
... There are more stars in the sky than anyone can easily count, but they are not scattered evenly, and they are not all the same in brightness or color. By the end of the 5th grade, students should know that The patterns of stars in the sky stay the same, although they appear to move across the sk ...
Document
... structure, some nebulae might actually be entire separate galaxies or island universes 1774-1781 - Messier catalog compiled (109 objects in Northern sky) including Andromeda galaxy - M31 ...
... structure, some nebulae might actually be entire separate galaxies or island universes 1774-1781 - Messier catalog compiled (109 objects in Northern sky) including Andromeda galaxy - M31 ...
Study of the X-ray Source Population and the Dark Matter
... Owing to the large effective area, large field of view, and high spatial and time resolution, the Wide Field Imager of the Athena Xray Observatory will make it possible to study X-ray sources down to very low flux limits. In Draco dSph, e.g., we will be able to observe X-ray sources with luminositie ...
... Owing to the large effective area, large field of view, and high spatial and time resolution, the Wide Field Imager of the Athena Xray Observatory will make it possible to study X-ray sources down to very low flux limits. In Draco dSph, e.g., we will be able to observe X-ray sources with luminositie ...
Chapter 24 - Cloudfront.net
... Reflecting Telescope – a telescope that concentrates light from distant objects by using a concave mirror Most large optical telescopes are reflectors; light does not pass through a mirror so the glass for a reflecting telescope does not have to be of optical quality ...
... Reflecting Telescope – a telescope that concentrates light from distant objects by using a concave mirror Most large optical telescopes are reflectors; light does not pass through a mirror so the glass for a reflecting telescope does not have to be of optical quality ...
Chapter 19. Mapping the Universe from Herschel to Sloan
... The key to understanding the nature of galaxies was to get their distances. In the mid1920’s telescopes were able to resolve individual stars in the closest galaxies, such as M31 (Andromeda Galaxy) and M33, but the star were too faint to obtain spectra which could be classified. Therefore, we did no ...
... The key to understanding the nature of galaxies was to get their distances. In the mid1920’s telescopes were able to resolve individual stars in the closest galaxies, such as M31 (Andromeda Galaxy) and M33, but the star were too faint to obtain spectra which could be classified. Therefore, we did no ...
deep space - altaastronomy
... heavy stars. When these stars end their lives in a supernova explosion, their cores collapse and gravity wins out over any other force that might be able to hold the star up. • Eventually, the star collapses so much that it is contained within its Schwarzschild radius, or event horizon, the boundary ...
... heavy stars. When these stars end their lives in a supernova explosion, their cores collapse and gravity wins out over any other force that might be able to hold the star up. • Eventually, the star collapses so much that it is contained within its Schwarzschild radius, or event horizon, the boundary ...
Celestial Bodies
... This is a scene from the Bayeux tapestry. A supernova has been drawn in the upper right corner. The Chinese also recorded seeing it around the same time. ...
... This is a scene from the Bayeux tapestry. A supernova has been drawn in the upper right corner. The Chinese also recorded seeing it around the same time. ...
Main Sequence Star
... Reber- 1911• Built the first radio telescope Collects radio waves from space Can be used at anytime or weather ...
... Reber- 1911• Built the first radio telescope Collects radio waves from space Can be used at anytime or weather ...
ISP 205 Review Questions, Week 13
... 5. The picture below shows two cross sections of the same chunk of the universe, at time intervals separated by 2 billion years. We are on the Milky Way Galaxy, and have measured the distances to a number of other galaxies at both times. Our results (in millions of light years) are shown on the fig ...
... 5. The picture below shows two cross sections of the same chunk of the universe, at time intervals separated by 2 billion years. We are on the Milky Way Galaxy, and have measured the distances to a number of other galaxies at both times. Our results (in millions of light years) are shown on the fig ...
Deep Space and Solar System
... • One light year is how far light travels in one year (based on distance NOT time) • We see all night stars as they were when the light we see left each star ...
... • One light year is how far light travels in one year (based on distance NOT time) • We see all night stars as they were when the light we see left each star ...
Stellar Evolution
... The Big Bang • Tremendous explosion started the expansion of the universe • All of the matter and energy of the universe was contained at one point ...
... The Big Bang • Tremendous explosion started the expansion of the universe • All of the matter and energy of the universe was contained at one point ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.