Big Bang and Life Cycle of Stars
... core which leads to burning at a higher temperature. These tend to be the brightest and hottest stars = Blue stars in the upper left corner of HR diagram. Small nebulas, produce small cool stars that are long lived. Less gravitational force, but strong enough for the core to produce fusion. These ar ...
... core which leads to burning at a higher temperature. These tend to be the brightest and hottest stars = Blue stars in the upper left corner of HR diagram. Small nebulas, produce small cool stars that are long lived. Less gravitational force, but strong enough for the core to produce fusion. These ar ...
... Time-dependent perturbation theory: Time dependent perturbation theory, interaction picture, constant and harmonic perturbation – Fermi’s Golden rule, sudden and adiabatic approximation. Scattering theory: Laboratory and centre of mass frames, differential and total scattering crosssection, scatteri ...
The Science of Life in the Universe (Chap 2
... the ages of rocks. The oldest rocks found anywhere in the solar system are meteorites, the bits of meteoroids that survive passing through the Earth’s atmosphere and land on our planet’s surface. Radioactive age-dating of meteorites, reveals that they are all nearly the same age, about 4.56 bill ...
... the ages of rocks. The oldest rocks found anywhere in the solar system are meteorites, the bits of meteoroids that survive passing through the Earth’s atmosphere and land on our planet’s surface. Radioactive age-dating of meteorites, reveals that they are all nearly the same age, about 4.56 bill ...
The Science of Life in the Universe (Chap 2
... the ages of rocks. The oldest rocks found anywhere in the solar system are meteorites, the bits of meteoroids that survive passing through the Earth’s atmosphere and land on our planet’s surface. Radioactive age-dating of meteorites, reveals that they are all nearly the same age, about 4.56 bill ...
... the ages of rocks. The oldest rocks found anywhere in the solar system are meteorites, the bits of meteoroids that survive passing through the Earth’s atmosphere and land on our planet’s surface. Radioactive age-dating of meteorites, reveals that they are all nearly the same age, about 4.56 bill ...
Astrophysics
... comparison comments? A good way to look for these types of programs is to go to www.seds.org and click Guides – Astronomy Software. You get a big list with links, type and cost Contemporary Laboratory Experiences in Astronomy, or 'CLEA' is a set of computer based exercises that can be downloaded (fr ...
... comparison comments? A good way to look for these types of programs is to go to www.seds.org and click Guides – Astronomy Software. You get a big list with links, type and cost Contemporary Laboratory Experiences in Astronomy, or 'CLEA' is a set of computer based exercises that can be downloaded (fr ...
Chapter 3 Notes
... the ages of rocks. The oldest rocks found anywhere in the solar system are meteorites, the bits of meteoroids that survive passing through the Earth’s atmosphere and land on our planet’s surface. Radioactive age-dating of meteorites, reveals that they are all nearly the same age, about 4.56 bill ...
... the ages of rocks. The oldest rocks found anywhere in the solar system are meteorites, the bits of meteoroids that survive passing through the Earth’s atmosphere and land on our planet’s surface. Radioactive age-dating of meteorites, reveals that they are all nearly the same age, about 4.56 bill ...
pptx
... moving electron to higher level requires energy; moving to lower level releases energy absorption or emission of photons of light of specific wavelength (energy) ...
... moving electron to higher level requires energy; moving to lower level releases energy absorption or emission of photons of light of specific wavelength (energy) ...
Black Holes: Edge of Infinity Jonathan McKinney
... What are they? How do we find them? Where do they come from? What is their impact on evolution of Universe? How do we use them to test Einstein’s GR? ...
... What are they? How do we find them? Where do they come from? What is their impact on evolution of Universe? How do we use them to test Einstein’s GR? ...
Selected Physical and Astronomical Constants Conversion Factors
... mean; how can I observe it? Can I extract energy from a spinning black hole? What is a quasar? Do spinning black holes power quasars; if so, how? What are gravitational waves? What can gravitational waves tell us about the Universe that light cannot? How far away is the most distant galaxy that we s ...
... mean; how can I observe it? Can I extract energy from a spinning black hole? What is a quasar? Do spinning black holes power quasars; if so, how? What are gravitational waves? What can gravitational waves tell us about the Universe that light cannot? How far away is the most distant galaxy that we s ...
Aug 2015 supplement - Hermanus Astronomy
... Big Bang, the universe was full of a fog of hydrogen gas. But as more and more brilliant sources - both stars and quasars powered by huge black holes started to shine, they cleared away the mist and made the universe transparent to ultraviolet light. Astronomers call this the epoch of reionisation, ...
... Big Bang, the universe was full of a fog of hydrogen gas. But as more and more brilliant sources - both stars and quasars powered by huge black holes started to shine, they cleared away the mist and made the universe transparent to ultraviolet light. Astronomers call this the epoch of reionisation, ...
Universe and Star Formation - White Plains Public Schools
... The Universe The Big Bang The Big Crunch? • The future of the universe follows two possible paths: 1. The universe will expand forever. 2. The outward expansion will stop and gravitational contraction will follow. • The view currently favored by most scientists is an expanding universe with no en ...
... The Universe The Big Bang The Big Crunch? • The future of the universe follows two possible paths: 1. The universe will expand forever. 2. The outward expansion will stop and gravitational contraction will follow. • The view currently favored by most scientists is an expanding universe with no en ...
Lecture 17: Black Holes
... settle in the center to a thermal distribution. • If sufficient dark matter accumulates, it collapses into a self-gravitating object in the star center. • If the dark matter mass is greater than its Chandrasekhar mass, it collapses to a black hole. • The black hole can then eat the whole star. • The ...
... settle in the center to a thermal distribution. • If sufficient dark matter accumulates, it collapses into a self-gravitating object in the star center. • If the dark matter mass is greater than its Chandrasekhar mass, it collapses to a black hole. • The black hole can then eat the whole star. • The ...
The phenomena of astrophysical masers are not new by any means
... spontaneously emitted particles then interact with the unexcited particles moving them to higher energy levels where they quickly shift down to the lower energy level. When this happens each de-excited particle emits two photons at the same frequency of the excitation energy. The first artificial ma ...
... spontaneously emitted particles then interact with the unexcited particles moving them to higher energy levels where they quickly shift down to the lower energy level. When this happens each de-excited particle emits two photons at the same frequency of the excitation energy. The first artificial ma ...
Kroupa - SatelliteGa.. - University of Hertfordshire
... colleague Dr Manuel Metz, now at the Deutsches Zentrum fuer Luft- and Raumfahrt, also worked on the study. “Fragments from early collisions can form the revolving dwarf galaxies we see today” comments Dr Metz. But he adds that this introduces a paradox. “Calculations suggest that the dwarf satellite ...
... colleague Dr Manuel Metz, now at the Deutsches Zentrum fuer Luft- and Raumfahrt, also worked on the study. “Fragments from early collisions can form the revolving dwarf galaxies we see today” comments Dr Metz. But he adds that this introduces a paradox. “Calculations suggest that the dwarf satellite ...
Comments
... by the thermal properties of the inflowing gas and their interplay with the clustering and feedback processes, all functions of the dark-matter halo mass associated with a similar scale. In haloes below a critical shock-heating mass Ms~6x10^11 Msol, discs are built by cold streams, not heated by a v ...
... by the thermal properties of the inflowing gas and their interplay with the clustering and feedback processes, all functions of the dark-matter halo mass associated with a similar scale. In haloes below a critical shock-heating mass Ms~6x10^11 Msol, discs are built by cold streams, not heated by a v ...
1 VERSION 21A Cosmos+ A big bang family performance about the
... You may call me a comet-tail detective. Some comets only pass by Earth once. Then I am ready to observe them. ---------------------ASTRONOMER When I go out at night, and the sky is clear, I always look up. It is a habit of mine and it is something I wish more people would do. You might see something ...
... You may call me a comet-tail detective. Some comets only pass by Earth once. Then I am ready to observe them. ---------------------ASTRONOMER When I go out at night, and the sky is clear, I always look up. It is a habit of mine and it is something I wish more people would do. You might see something ...
2. The World at Large: From the Big Bang to Black Holes
... relatively short time, only about 500 million years, in the red giant stage. After that, helium burning starts in the center followed by further short-lived fusion reactions. Eventually the outer shell of about one quarter of the mass is expelled. The remaining core shrinks to a very dense object of ...
... relatively short time, only about 500 million years, in the red giant stage. After that, helium burning starts in the center followed by further short-lived fusion reactions. Eventually the outer shell of about one quarter of the mass is expelled. The remaining core shrinks to a very dense object of ...
Slide 1
... 2) Determine the expansion history of the Universe and its growth of structure in order to test explanations of its apparent accelerating expansion including Dark Energy and possible modifications to Einstein's gravity. 3) Produce a deep map of the sky at NIR wavelengths, enabling new and fundamenta ...
... 2) Determine the expansion history of the Universe and its growth of structure in order to test explanations of its apparent accelerating expansion including Dark Energy and possible modifications to Einstein's gravity. 3) Produce a deep map of the sky at NIR wavelengths, enabling new and fundamenta ...
Hubble Space Telescope`s
... Peering into the crowded bulge of our Milky Way galaxy, Hubble looked farther than ever before to nab a group of planet candidates outside our solar system. Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a nar ...
... Peering into the crowded bulge of our Milky Way galaxy, Hubble looked farther than ever before to nab a group of planet candidates outside our solar system. Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a nar ...
PDF - Amazing Space, STScI
... Peering into the crowded bulge of our Milky Way galaxy, Hubble looked farther than ever before to nab a group of planet candidates outside our solar system. Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a nar ...
... Peering into the crowded bulge of our Milky Way galaxy, Hubble looked farther than ever before to nab a group of planet candidates outside our solar system. Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a nar ...
relativistic time correction on movement of distant galaxies
... distance of 13.4 billion light years from Earth. That means, light that we have just received is giving information about 13.4 billion years old. This galaxy is reported to be containing stars. Suppose there is a Sun like star of about 5 billion years old, then that star was formed at about 13.4+5=1 ...
... distance of 13.4 billion light years from Earth. That means, light that we have just received is giving information about 13.4 billion years old. This galaxy is reported to be containing stars. Suppose there is a Sun like star of about 5 billion years old, then that star was formed at about 13.4+5=1 ...
The galaxies that host powerful radio sources
... • Faint at radio and IR wavelengths. These facts suggest they are distant and dusty. ...
... • Faint at radio and IR wavelengths. These facts suggest they are distant and dusty. ...
ASTR 340 - TerpConnect
... Mediterranean had switched the question from “Who?” to “How””. They are trying to explain how the elements of earth, fire, air and water interact to produce the “cosmos” they were able to observe. The prevailing thinking was that the (cosmos) earth was the center of the Universe. Under the philosoph ...
... Mediterranean had switched the question from “Who?” to “How””. They are trying to explain how the elements of earth, fire, air and water interact to produce the “cosmos” they were able to observe. The prevailing thinking was that the (cosmos) earth was the center of the Universe. Under the philosoph ...
No Slide Title
... • We learn about stars by studying energy. – Stars produce a full range of electromagnetic radiation, from high-energy X-rays to low-energy radio waves. – Scientists use optical telescopes to study visible light and radio telescopes to study radio waves emitted from astronomical objects. – Earth’s a ...
... • We learn about stars by studying energy. – Stars produce a full range of electromagnetic radiation, from high-energy X-rays to low-energy radio waves. – Scientists use optical telescopes to study visible light and radio telescopes to study radio waves emitted from astronomical objects. – Earth’s a ...
Physical cosmology
Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate. For most of human history, it was a branch of metaphysics and religion. Cosmology as a science originated with the Copernican principle, which implies that celestial bodies obey identical physical laws to those on Earth, and Newtonian mechanics, which first allowed us to understand those physical laws.Physical cosmology, as it is now understood, began with the development in 1915 of Albert Einstein's general theory of relativity, followed by major observational discoveries in the 1920s: first, Edwin Hubble discovered that the universe contains a huge number of external galaxies beyond our own Milky Way; then, work by Vesto Slipher and others showed that the universe is expanding. These advances made it possible to speculate about the origin of the universe, and allowed the establishment of the Big Bang Theory, by Georges Lemaitre, as the leading cosmological model. A few researchers still advocate a handful of alternative cosmologies; however, most cosmologists agree that the Big Bang theory explains the observations better.Dramatic advances in observational cosmology since the 1990s, including the cosmic microwave background, distant supernovae and galaxy redshift surveys, have led to the development of a standard model of cosmology. This model requires the universe to contain large amounts of dark matter and dark energy whose nature is currently not well understood, but the model gives detailed predictions that are in excellent agreement with many diverse observations.Cosmology draws heavily on the work of many disparate areas of research in theoretical and applied physics. Areas relevant to cosmology include particle physics experiments and theory, theoretical and observational astrophysics, general relativity, quantum mechanics, and plasma physics.