Three of his best known contributions
...
1.What are your values for the Hubble constant, maximum age of the Universe, and the age
considering deceleration due to gravity?
2. Identify the galaxy with the highest redshift and state its recessional velocity.
What fraction of the speed of light is that galaxy receding from us ...
...
PH607lec12-10agn2
... 4. Quasars & Blazars (AGN – Part 2) Some radio sources were not associated with galaxies, but with stellar-like sources on optical images In 1963, Maarten Schmidt made the breakthrough that the spectrum of 3C273 had nebular emission lines at the then unheard of redshift of z=0.158 ...
... 4. Quasars & Blazars (AGN – Part 2) Some radio sources were not associated with galaxies, but with stellar-like sources on optical images In 1963, Maarten Schmidt made the breakthrough that the spectrum of 3C273 had nebular emission lines at the then unheard of redshift of z=0.158 ...
Cosmology Handouts
... Rainbows reveal that white light is a combination of all the colours. In 1666, Isaac Newton showed that white light could be separated into its component colours using glass prisms. Soon scientists were using this new tool to analyze the light coming from several different light sources. Some scient ...
... Rainbows reveal that white light is a combination of all the colours. In 1666, Isaac Newton showed that white light could be separated into its component colours using glass prisms. Soon scientists were using this new tool to analyze the light coming from several different light sources. Some scient ...
"Seeing" Dark Matter
... lensing to estimate the masses of objects over a huge range—planets, stars, galaxies, and clusters of galaxies. Even though the principle is the same—the observed redirection of light coming from a source located behind the lens—the measured effects and terminology differ. Astronomers use “weak lens ...
... lensing to estimate the masses of objects over a huge range—planets, stars, galaxies, and clusters of galaxies. Even though the principle is the same—the observed redirection of light coming from a source located behind the lens—the measured effects and terminology differ. Astronomers use “weak lens ...
Selected Physical and Astronomical Constants Conversion Factors
... upper and lower limits on the mass of a star, a white dwarf, a neutron star, a black hole? Which of these bodies require general relativity for its correct description? In what sense are space and time unified? Why do things fall in my everyday life on Earth? Does the term relativity mean that every ...
... upper and lower limits on the mass of a star, a white dwarf, a neutron star, a black hole? Which of these bodies require general relativity for its correct description? In what sense are space and time unified? Why do things fall in my everyday life on Earth? Does the term relativity mean that every ...
G. Volkov (PNPI, Gatchina)
... But mathematically formulated two principles THAT was clearly not enough for a deeper understanding of the nature of light and its associated structure of space-time. For completeness, the physical picture in the first thing is not enough introduction to the theory of all material objects, which mus ...
... But mathematically formulated two principles THAT was clearly not enough for a deeper understanding of the nature of light and its associated structure of space-time. For completeness, the physical picture in the first thing is not enough introduction to the theory of all material objects, which mus ...
Space and Time The Issue of the Beginning and the End
... now the geometry of this continuum is curved and the amount of curvature in a region encodes the strength of gravity there. Space-time is not an inert entity. It acts on matter and can be acted upon. As the American physicist John Wheeler put it: Matter tells space-time how to bend and space-time te ...
... now the geometry of this continuum is curved and the amount of curvature in a region encodes the strength of gravity there. Space-time is not an inert entity. It acts on matter and can be acted upon. As the American physicist John Wheeler put it: Matter tells space-time how to bend and space-time te ...
Talk - Otterbein University
... • Without knowing its size, we don’t know how much energy it can produce, so we can’t figure out how the Sun “works” ...
... • Without knowing its size, we don’t know how much energy it can produce, so we can’t figure out how the Sun “works” ...
The Teleological Argument - University of Colorado Boulder
... they are so formed and adjusted as to produce motion, and that motion so regulated as to point out the hour of the day; that if the different parts had been differently shaped …, of a different size …, or placed after any other manner or in any other order …, either no motion at all would have been ...
... they are so formed and adjusted as to produce motion, and that motion so regulated as to point out the hour of the day; that if the different parts had been differently shaped …, of a different size …, or placed after any other manner or in any other order …, either no motion at all would have been ...
Rhodri Evans - LA Flood Project
... call the “cosmic microwave background radiation”. This radiation was finally discovered in 1964, and since then advances in both theory and observations (such as the BICEP2 experiment mentioned above) now allow us to argue that we understand the physics of the Universe back to the briefest fraction ...
... call the “cosmic microwave background radiation”. This radiation was finally discovered in 1964, and since then advances in both theory and observations (such as the BICEP2 experiment mentioned above) now allow us to argue that we understand the physics of the Universe back to the briefest fraction ...
Hubble Space Telescope`s
... Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a narrow slice of sky, the telescope nabbed 16 potential alien worlds orbiting a variety of stars. Astronomers have estimated that about 5 percent of stars in the ...
... Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a narrow slice of sky, the telescope nabbed 16 potential alien worlds orbiting a variety of stars. Astronomers have estimated that about 5 percent of stars in the ...
Active Galactic Nuclei - University of Toronto
... Wind from Accretion Disk around a Black Hole This illustration depicts a massive black hole at the center of a galaxy. Around it is a swirling disk of gas, which gradually pours down into the black hole. As the gas falls inward, it heats up and glows brightly, getting hotter and hotter the closer it ...
... Wind from Accretion Disk around a Black Hole This illustration depicts a massive black hole at the center of a galaxy. Around it is a swirling disk of gas, which gradually pours down into the black hole. As the gas falls inward, it heats up and glows brightly, getting hotter and hotter the closer it ...
PDF - Amazing Space, STScI
... Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a narrow slice of sky, the telescope nabbed 16 potential alien worlds orbiting a variety of stars. Astronomers have estimated that about 5 percent of stars in the ...
... Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a narrow slice of sky, the telescope nabbed 16 potential alien worlds orbiting a variety of stars. Astronomers have estimated that about 5 percent of stars in the ...
Galaxy - Bama.ua.edu
... • If the density is 9x10-27 kg/m3 then the galaxies will just barely recede forever despite gravitational action of matter and dark matter. • This is called the ``critical density.” • This universe is called the ``flat universe.” • Present day density (luminous and dark matter) is only ~1/4 the crit ...
... • If the density is 9x10-27 kg/m3 then the galaxies will just barely recede forever despite gravitational action of matter and dark matter. • This is called the ``critical density.” • This universe is called the ``flat universe.” • Present day density (luminous and dark matter) is only ~1/4 the crit ...
Galaxies and the Universe
... – The farthest that any light could have travelled is 13.7 billion light years. cosmic horizon ...
... – The farthest that any light could have travelled is 13.7 billion light years. cosmic horizon ...
G485 5.5.1 Structure of the Universe
... that the spectrum for one of them did not fit any known element, but the pattern of lines was the same as that for hydrogen but very substantially shifted towards the red end of the spectrum. One of the lines was even shifted into the invisible infrared. ...
... that the spectrum for one of them did not fit any known element, but the pattern of lines was the same as that for hydrogen but very substantially shifted towards the red end of the spectrum. One of the lines was even shifted into the invisible infrared. ...
Chapter 1 Our Place in the Universe
... Observations of galaxies show that the entire universe is expanding, the average distance between galaxies is increasing with time. This means that galaxies ( or at least matter) must have been close together in the past. If we go back far enough, all the matter was concentrated in a small radius fr ...
... Observations of galaxies show that the entire universe is expanding, the average distance between galaxies is increasing with time. This means that galaxies ( or at least matter) must have been close together in the past. If we go back far enough, all the matter was concentrated in a small radius fr ...
Great Astronomers of the 20th Century
... Jill Tarter • Joint appointment at UC Berkeley and SETI ...
... Jill Tarter • Joint appointment at UC Berkeley and SETI ...
Physics and Philosophy beyond the Standard Model
... universe is flat with only a 0.4% margin of error." [7] and b) the shape of the Universe found to best fit observational data is the infinite flat model [8] Each “subuniverse” (bubble or pocket universe) is one of an infinite series composing the physically infinite and eternal space-time of the uni ...
... universe is flat with only a 0.4% margin of error." [7] and b) the shape of the Universe found to best fit observational data is the infinite flat model [8] Each “subuniverse” (bubble or pocket universe) is one of an infinite series composing the physically infinite and eternal space-time of the uni ...
Non-standard cosmology
A non-standard cosmology is any physical cosmological model of the universe that has been, or still is, proposed as an alternative to the Big Bang model of standard physical cosmology. In the history of cosmology, various scientists and researchers have disputed parts or all of the Big Bang due to a rejection or addition of fundamental assumptions needed to develop a theoretical model of the universe. From the 1940s to the 1960s, the astrophysical community was equally divided between supporters of the Big Bang theory and supporters of a rival steady state universe. It was not until advances in observational cosmology in the late 1960s that the Big Bang would eventually become the dominant theory, and today there are few active researchers who dispute it.The term non-standard is applied to any cosmological theory that does not conform to the scientific consensus, but is not used in describing alternative models where no consensus has been reached, and is also used to describe theories that accept a ""big bang"" occurred but differ as to the detailed physics of the origin and evolution of the universe. Because the term depends on the prevailing consensus, the meaning of the term changes over time. For example, hot dark matter would not have been considered non-standard in 1990, but would be in 2010. Conversely, a non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in 2010.