Chapter 3 Cosmology 3.1 The Doppler effect
... galaxies and were able to identify prominent spectral lines as in the spectra of individual stars but ‘red-shifted’ to longer wavelengths. Hubble studied galaxies which were close enough to be resolved into individual stars. For each galaxy, he measured: its red shift and then calculated its speed ...
... galaxies and were able to identify prominent spectral lines as in the spectra of individual stars but ‘red-shifted’ to longer wavelengths. Hubble studied galaxies which were close enough to be resolved into individual stars. For each galaxy, he measured: its red shift and then calculated its speed ...
here - ScienceA2Z.com
... Spatial scale provides a "shorthand" form for discussing relative lengths, areas, distances and sizes. A microclimate, for instance, is one that might occur in a mountain valley or near a lakeshore, whereas a megatrend is one which involves the whole planet. It is important to realize that these div ...
... Spatial scale provides a "shorthand" form for discussing relative lengths, areas, distances and sizes. A microclimate, for instance, is one that might occur in a mountain valley or near a lakeshore, whereas a megatrend is one which involves the whole planet. It is important to realize that these div ...
The Hubble Redshift Distance Relation
... “E” buttons to move the telescope until the central red box is centered on one of the galaxies (you can change how quickly the telescope moves - or slews - by clicking on the Slew Rate button). Next, click on Change View to change from the finder scope to the spectrometer. You will see an enlarged v ...
... “E” buttons to move the telescope until the central red box is centered on one of the galaxies (you can change how quickly the telescope moves - or slews - by clicking on the Slew Rate button). Next, click on Change View to change from the finder scope to the spectrometer. You will see an enlarged v ...
Candles in the Dark
... again. Some vary irregularly but many follow regular patterns, flickering in seconds or pulsing over years to a steady beat. Why this happens can be explained by the physics going on inside the star, but the details aren’t important here. There is a type of giant yellow variable star called a Cephei ...
... again. Some vary irregularly but many follow regular patterns, flickering in seconds or pulsing over years to a steady beat. Why this happens can be explained by the physics going on inside the star, but the details aren’t important here. There is a type of giant yellow variable star called a Cephei ...
Radiation: The Key to Understanding the Universe
... It was much later, in 1930 that the line was found to be due to highly ionized Iron ions which survive at the high temperatures prevailing in the corona. 6. Expansion of the Universe and the Big Bang Theory Around 1928, Hubble measured the velocities, using Doppler effect, and distances to several ne ...
... It was much later, in 1930 that the line was found to be due to highly ionized Iron ions which survive at the high temperatures prevailing in the corona. 6. Expansion of the Universe and the Big Bang Theory Around 1928, Hubble measured the velocities, using Doppler effect, and distances to several ne ...
Mass Outflow in the Seyfert 1 Galaxy NGC 4151
... Note: the assumptions only apply on the largest scales – there is ample evidence for local inhomogeneity, anisotropy (e.g. galaxies) Also: evolutionary changes not considered ...
... Note: the assumptions only apply on the largest scales – there is ample evidence for local inhomogeneity, anisotropy (e.g. galaxies) Also: evolutionary changes not considered ...
HST Key Project to Measure the Hubble Constant from
... Using Cepheid variable stars to measure distances Secondary Methods The Key Project Results ...
... Using Cepheid variable stars to measure distances Secondary Methods The Key Project Results ...
Lecture2 - UCSB Physics
... Milky Way) • Thus, the size of M31 is 70 kpc, larger than our own Milky Way. • The same is true for billions of galaxies that populate the universe! Our Milky Way is just and “average Joe” galaxy • Overnight people realized that the universe was thousands of times bigger than they thought ...
... Milky Way) • Thus, the size of M31 is 70 kpc, larger than our own Milky Way. • The same is true for billions of galaxies that populate the universe! Our Milky Way is just and “average Joe” galaxy • Overnight people realized that the universe was thousands of times bigger than they thought ...
What kind of stuff
... Milky Way) • Thus, the size of M31 is 70 kpc, larger than our own Milky Way. • The same is true for billions of galaxies that populate the universe! Our Milky Way is just and “average Joe” galaxy • Overnight people realized that the universe was thousands of times bigger than they thought ...
... Milky Way) • Thus, the size of M31 is 70 kpc, larger than our own Milky Way. • The same is true for billions of galaxies that populate the universe! Our Milky Way is just and “average Joe” galaxy • Overnight people realized that the universe was thousands of times bigger than they thought ...
Universe 8e Lecture Chapter 24 Galaxies
... The Hubble Law: There is a simple linear relationship between the distance from the Earth to a remote galaxy and the redshift of that galaxy (which is a measure of the speed with which it is receding from us). This relationship is the Hubble law, v = H0d. The value of the Hubble constant, H0, is not ...
... The Hubble Law: There is a simple linear relationship between the distance from the Earth to a remote galaxy and the redshift of that galaxy (which is a measure of the speed with which it is receding from us). This relationship is the Hubble law, v = H0d. The value of the Hubble constant, H0, is not ...
Talk - Otterbein University
... Using Redshift: Hubble’s Law • The final rung on the cosmic distance ladder • Hubble’s observations (1920’s): – Light from distant galaxies is redshifted – The more distant the galaxy, the greater the red-shift ...
... Using Redshift: Hubble’s Law • The final rung on the cosmic distance ladder • Hubble’s observations (1920’s): – Light from distant galaxies is redshifted – The more distant the galaxy, the greater the red-shift ...
Extragalactic AO Science
... Normal galaxy disks only achieve a maximum SB of K~16 mag/sq arcsec and this fades as (1+z)4. This means all normal disks are fainter than 22.5 mag within 0.05x0.05”. ...
... Normal galaxy disks only achieve a maximum SB of K~16 mag/sq arcsec and this fades as (1+z)4. This means all normal disks are fainter than 22.5 mag within 0.05x0.05”. ...
creation of a cosmology: big bang theory _eng
... Primordial Fireball, the theory gained momentum until it received a worthy adversarial cosmology known as the Steady State Theory. Fred Hoyle (who despairingly coined the term Big Bang) and his colleagues constructed a model of the universe that was widely accepted for religious reasons if not so mu ...
... Primordial Fireball, the theory gained momentum until it received a worthy adversarial cosmology known as the Steady State Theory. Fred Hoyle (who despairingly coined the term Big Bang) and his colleagues constructed a model of the universe that was widely accepted for religious reasons if not so mu ...
What are your ideas about The Universe? - Harvard
... Many people, adults and students alike, are familiar with the names of objects in space, but have an incomplete mental model of WHERE those objects are in space, their relative size and scale, and how they fit into the cosmic scheme of things. Understanding the sizes and distances of celestial objec ...
... Many people, adults and students alike, are familiar with the names of objects in space, but have an incomplete mental model of WHERE those objects are in space, their relative size and scale, and how they fit into the cosmic scheme of things. Understanding the sizes and distances of celestial objec ...
Advancing Physics A2
... take too long to return and would be too weak to detect. In this case we must make use of the Doppler effect. Atoms in the distant stars emit light at particular wavelengths. If we can identify the elements from which the light is emitted it is possible to measure these wavelengths accurately on Ear ...
... take too long to return and would be too weak to detect. In this case we must make use of the Doppler effect. Atoms in the distant stars emit light at particular wavelengths. If we can identify the elements from which the light is emitted it is possible to measure these wavelengths accurately on Ear ...
Weaknesses in Gravity and Cosmology Theories-19-06-11
... Let us see if there are alternatives. The Michelson and Morley experiment gave a status quo result. Strictly speaking, that means that the velocity of the aether is zero to the Earth and that no theory at all can be found through the experiment. There was an excellent reason to maintain the hypothes ...
... Let us see if there are alternatives. The Michelson and Morley experiment gave a status quo result. Strictly speaking, that means that the velocity of the aether is zero to the Earth and that no theory at all can be found through the experiment. There was an excellent reason to maintain the hypothes ...
Weaknesses in Gravity and Cosmology Theories-19-06-11
... Let us see if there are alternatives. The Michelson and Morley experiment gave a status quo result. Strictly speaking, that means that the velocity of the aether is zero to the Earth and that no theory at all can be found through the experiment. There was an excellent reason to maintain the hypothes ...
... Let us see if there are alternatives. The Michelson and Morley experiment gave a status quo result. Strictly speaking, that means that the velocity of the aether is zero to the Earth and that no theory at all can be found through the experiment. There was an excellent reason to maintain the hypothes ...
Lesson 55 – The Structure of the Universe - science
... A diagrammatic version of the shift of two absorption lines for three galaxies together with their speeds of recession is shown in the following diagram. The comparison spectrum of an element on Earth, at rest compared with the observer, is shown above and below each galactic spectrum. For very high ...
... A diagrammatic version of the shift of two absorption lines for three galaxies together with their speeds of recession is shown in the following diagram. The comparison spectrum of an element on Earth, at rest compared with the observer, is shown above and below each galactic spectrum. For very high ...
Lab 9
... the center of our galaxy, the Milky Way. The Milky Way, in turn, orbits the center of the Local Group, a cluster of galaxies. The Local Group orbits the center of the Virgo Supercluster, a cluster of clusters of galaxies. Classifying galaxies The Hubble Deep Field project, taken by the Hubble Wide F ...
... the center of our galaxy, the Milky Way. The Milky Way, in turn, orbits the center of the Local Group, a cluster of galaxies. The Local Group orbits the center of the Virgo Supercluster, a cluster of clusters of galaxies. Classifying galaxies The Hubble Deep Field project, taken by the Hubble Wide F ...
General Relativity and the Accelerated Expansion of the Universe
... produce a static universe. Astronomers, those days, believed that stars and nebulae do not exhibit any largescale ordered motion. The prevalent view in the past was that the universe on large scales is static. GR, being a theory of attractive gravity, predicted that a large mass (like our universe) ...
... produce a static universe. Astronomers, those days, believed that stars and nebulae do not exhibit any largescale ordered motion. The prevalent view in the past was that the universe on large scales is static. GR, being a theory of attractive gravity, predicted that a large mass (like our universe) ...
Image Credit - Northwestern University
... Near perfect Blackbody observed by COBE What will happen to this Blackbody curve as the universe continues to expand? ...
... Near perfect Blackbody observed by COBE What will happen to this Blackbody curve as the universe continues to expand? ...
The cosmic distance scale
... distances much further away than the Virgo cluster (and we do!). We would need a type of object that is much brighter than a Cepheid that also has a known absolute magnitude so that we know how much light is emitted. Type Ia supernovae1 are very bright, in fact about 14 magnitudes brighter than Ceph ...
... distances much further away than the Virgo cluster (and we do!). We would need a type of object that is much brighter than a Cepheid that also has a known absolute magnitude so that we know how much light is emitted. Type Ia supernovae1 are very bright, in fact about 14 magnitudes brighter than Ceph ...
Chapter 31 - The Galaxy & Universe
... III. Groups & Clusters A. Local group B. There are clusters much bigger than local group (ex. Virgo) C. Mass of clusters are bigger than the sum of the parts. ...
... III. Groups & Clusters A. Local group B. There are clusters much bigger than local group (ex. Virgo) C. Mass of clusters are bigger than the sum of the parts. ...
An analogy
... – same wavebands for all galaxies – Critical for comparison of objects at high and low redshifts: • rest-frame images are needed. • Galaxy at z=1 in R-band should be compared to z=0 galaxy observed in the U-band ...
... – same wavebands for all galaxies – Critical for comparison of objects at high and low redshifts: • rest-frame images are needed. • Galaxy at z=1 in R-band should be compared to z=0 galaxy observed in the U-band ...