ASPEN WORKSHOP 2003
... Asymmetry index is another way to identify mergers (subtract flipped image), zero in ellipticals, larger in bluer galaxies, up to few tenths. AI(Red), or AI(Blue) >0.3 suggests interaction, as in half of ULIRGS [as long as they are identified as “single galaxy”!] Simulations show that AI stays above ...
... Asymmetry index is another way to identify mergers (subtract flipped image), zero in ellipticals, larger in bluer galaxies, up to few tenths. AI(Red), or AI(Blue) >0.3 suggests interaction, as in half of ULIRGS [as long as they are identified as “single galaxy”!] Simulations show that AI stays above ...
File - Mr. Catt`s Class
... relatively slow speed, which can be detected only by its gravitational interactions; it appears to be quite abundant throughout the universe. ...
... relatively slow speed, which can be detected only by its gravitational interactions; it appears to be quite abundant throughout the universe. ...
Chapter 17 - Astronomy
... 1. Every measurement in science is to some degree an approximation. No measurement is absolutely exact. What scientists attempt to do is to be aware of how inexact their measurements are. 2. Calculating the likely error is a common practice in all natural sciences. Scientists thus attempt to be spec ...
... 1. Every measurement in science is to some degree an approximation. No measurement is absolutely exact. What scientists attempt to do is to be aware of how inexact their measurements are. 2. Calculating the likely error is a common practice in all natural sciences. Scientists thus attempt to be spec ...
Spring 2015 Mercury - Astronomical Society of the Pacific
... mirror was found to be flawed. A quarter-century and five servicing missions later, Hubble is performing better than ever. But perhaps the most fascinating aspect of Hubble’s history is that it’s making observations that were never envisioned when it was being designed and built. Here’s one example. ...
... mirror was found to be flawed. A quarter-century and five servicing missions later, Hubble is performing better than ever. But perhaps the most fascinating aspect of Hubble’s history is that it’s making observations that were never envisioned when it was being designed and built. Here’s one example. ...
Sterrenstelsels en Cosmologie Docent: M. Franx, kamer 425
... •Very good dynamic range Photometry −> Imaging galaxies and measuring their brightness distribution •Big technical problem: galaxies are really large, and have low surface brightness wings. See the beautiful image of M31 ...
... •Very good dynamic range Photometry −> Imaging galaxies and measuring their brightness distribution •Big technical problem: galaxies are really large, and have low surface brightness wings. See the beautiful image of M31 ...
special - Carl Zeiss
... paradigm changes such as the introduction of quantum theory or Einstein’s general theory of relativity some 100 years ago. Exotic objects, such as neutron stars, black holes, remnants of supernovae and other gas nebulae, as well as entire stellar systems such as galaxies and galaxy clusters, present ...
... paradigm changes such as the introduction of quantum theory or Einstein’s general theory of relativity some 100 years ago. Exotic objects, such as neutron stars, black holes, remnants of supernovae and other gas nebulae, as well as entire stellar systems such as galaxies and galaxy clusters, present ...
web page pre-post test questions
... i) Draw a diagram that shows the Earth and the solar wind. ii) Put magnetic field lines emanating from the Earth and show how these field lines are affected by the solar ...
... i) Draw a diagram that shows the Earth and the solar wind. ii) Put magnetic field lines emanating from the Earth and show how these field lines are affected by the solar ...
3D Tour of the Universe Template
... regions, resulting in the formation of new young stars. As is common in these kinds of encounters, spiral structure was induced in the more massive galaxy. M51 is an easily found astronomical showpiece if the sky is dark, where suggestions of its spiral arms may be visible. As is also common with th ...
... regions, resulting in the formation of new young stars. As is common in these kinds of encounters, spiral structure was induced in the more massive galaxy. M51 is an easily found astronomical showpiece if the sky is dark, where suggestions of its spiral arms may be visible. As is also common with th ...
Pale Blue Dot
... recognize it as one world among an uncounted multitude of others, circling the Sun or orbiting the other stars that make up the Milky Way galaxy. Our planet and our solar system are surrounded by a new world ocean—the depths of space. It is no more impassable than the last. Maybe it’s a little earl ...
... recognize it as one world among an uncounted multitude of others, circling the Sun or orbiting the other stars that make up the Milky Way galaxy. Our planet and our solar system are surrounded by a new world ocean—the depths of space. It is no more impassable than the last. Maybe it’s a little earl ...
Chapter 15--Our Sun - Geological Sciences
... demands for roughly the next 500,000 years! Of course, only a tiny fraction of the Sun’s total energy output reaches Earth, with the rest dispersing in all directions into space. Most of this energy is radiated in the form of visible light, but once you leave the protective blanket of Earth’s atmosp ...
... demands for roughly the next 500,000 years! Of course, only a tiny fraction of the Sun’s total energy output reaches Earth, with the rest dispersing in all directions into space. Most of this energy is radiated in the form of visible light, but once you leave the protective blanket of Earth’s atmosp ...
File - xaviantvision
... district its legendary hero. But there were not very many gods, at least at first, perhaps only a few dozen. They lived on mountains, under the Earth, in the sea, or up there in the sky. They sent messages to people, intervened in human affairs, and interbred with us. As time passed, as the human ex ...
... district its legendary hero. But there were not very many gods, at least at first, perhaps only a few dozen. They lived on mountains, under the Earth, in the sea, or up there in the sky. They sent messages to people, intervened in human affairs, and interbred with us. As time passed, as the human ex ...
The Milky Way - The Independent School
... As you begin studying galaxies, you will discover they are classified into different types, and that will lead you to insights into how galaxies form and evolve. In the next chapter, you will discover that some galaxies are violently active, and that will give you more clues to the evolution of gala ...
... As you begin studying galaxies, you will discover they are classified into different types, and that will lead you to insights into how galaxies form and evolve. In the next chapter, you will discover that some galaxies are violently active, and that will give you more clues to the evolution of gala ...
Lecture 12: Galaxy Evolution
... change seen out to z=1 except possible in the blue spheroids ! • More data needed subject rapidly advancing due to new Galaxies – AS 3011 technologies. ...
... change seen out to z=1 except possible in the blue spheroids ! • More data needed subject rapidly advancing due to new Galaxies – AS 3011 technologies. ...
The local density of matter mapped by Hipparcos
... of matter in the local Galactic disc because of two significant improvements. First, the kinematics and vertical density distribution of stars used to trace the disc potential can be determined with much higher accuracy, permitting a better determination of the total amount of gravitating matter in ...
... of matter in the local Galactic disc because of two significant improvements. First, the kinematics and vertical density distribution of stars used to trace the disc potential can be determined with much higher accuracy, permitting a better determination of the total amount of gravitating matter in ...
Dark Matter, Dark Energy, and the Fate of the Universe
... that the orbital speeds remain Orbital speeds in the Milky Way remain high approximately constant beyond even very far from the center, indicating that the inner few thousand lighta large amount of dark matter lies beyond years, so most of the curve is our galaxy’s visible regions. relatively flat. ...
... that the orbital speeds remain Orbital speeds in the Milky Way remain high approximately constant beyond even very far from the center, indicating that the inner few thousand lighta large amount of dark matter lies beyond years, so most of the curve is our galaxy’s visible regions. relatively flat. ...
The Interstellar Medium in High Redshift Galaxies Comes of Age
... molecular gas in galaxy formation and for providing fundamental constraints on galaxy evolution. To date, a fairly small number of species, other than CO, have been detected at z > 2 (e.g. HCN, HNC, CN, H2 O, HCO+ ) and used as tracers of molecular gas. Recent observations with the Herschel Space Ob ...
... molecular gas in galaxy formation and for providing fundamental constraints on galaxy evolution. To date, a fairly small number of species, other than CO, have been detected at z > 2 (e.g. HCN, HNC, CN, H2 O, HCO+ ) and used as tracers of molecular gas. Recent observations with the Herschel Space Ob ...
The redshift of extragalactic nebulae
... Since at the time of Stromberg's investigation there was still no known reliable estimate of the distances of the nebulae, K. LUNDMARK tried to bring the observed large velocities into context with the "compactness" of photographic images of nebulae. This later proved to be an attempt in the right d ...
... Since at the time of Stromberg's investigation there was still no known reliable estimate of the distances of the nebulae, K. LUNDMARK tried to bring the observed large velocities into context with the "compactness" of photographic images of nebulae. This later proved to be an attempt in the right d ...
The Celestial Origin of Atoms
... it, we have been working with star dust, carried to us by the wind, and we drink the Universe in a raindrop.” Or again: “We are ash and dust, that may be true, but we are the ash and dust of stars.” This qualitative and poetic, but emotional and even violent, face of astrophysics is the one I lean t ...
... it, we have been working with star dust, carried to us by the wind, and we drink the Universe in a raindrop.” Or again: “We are ash and dust, that may be true, but we are the ash and dust of stars.” This qualitative and poetic, but emotional and even violent, face of astrophysics is the one I lean t ...
book_text4
... galaxies in the most distant reaches of the Universe. He started his career at the Royal Greenwich Observatory (RGO) in Herstmonceux, England in 1969 and was awarded his DPhil by the nearby University of Sussex in 1973. He then became one of the very first Research Fellows at the newly constructed A ...
... galaxies in the most distant reaches of the Universe. He started his career at the Royal Greenwich Observatory (RGO) in Herstmonceux, England in 1969 and was awarded his DPhil by the nearby University of Sussex in 1973. He then became one of the very first Research Fellows at the newly constructed A ...
A new view on the solar wind interaction with the Moon | Geoscience
... experiments with a flowing plasma of energy up to 55 eV interacting with a magnetic dipole field above an insulating surface, Howes et al. (2015) investigated the lunar surface charging in the magnetic anomaly regions. They have found that the surface gets charged to larger positive potentials of ar ...
... experiments with a flowing plasma of energy up to 55 eV interacting with a magnetic dipole field above an insulating surface, Howes et al. (2015) investigated the lunar surface charging in the magnetic anomaly regions. They have found that the surface gets charged to larger positive potentials of ar ...
Harvesting ALFALFA: Discovering Galaxies in the Pisces
... and peculiar velocities of galaxies and clusters to determine the underlying distribution of dark matter in the large scale structures of the universe. PPS has been found to be wall of clusters roughly 5h-1 Mpc to 10h-1 Mpc deep extending at least 50h-1 Mpc from the Perseus to Pegasus with a signifi ...
... and peculiar velocities of galaxies and clusters to determine the underlying distribution of dark matter in the large scale structures of the universe. PPS has been found to be wall of clusters roughly 5h-1 Mpc to 10h-1 Mpc deep extending at least 50h-1 Mpc from the Perseus to Pegasus with a signifi ...
Earth and Our Solar System File
... • Largest planet in the Solar System (300 times bigger than Earth) • 28 moons • It is a gas planet and has no solid surface • Has a giant storm -the ‘Red Spot’ with 250 mph winds (twice the size of Earth) ...
... • Largest planet in the Solar System (300 times bigger than Earth) • 28 moons • It is a gas planet and has no solid surface • Has a giant storm -the ‘Red Spot’ with 250 mph winds (twice the size of Earth) ...
Chronology of Physics
... a series of paradoxes, all based on fallacies, to prove it. Hippocrates stresses rationalism, careful observation and honorable standards in the practice of medicine. 350 BCE ...
... a series of paradoxes, all based on fallacies, to prove it. Hippocrates stresses rationalism, careful observation and honorable standards in the practice of medicine. 350 BCE ...
Early Star-Forming Galaxies and the Reionisation of the Universe
... of early galaxies and the distribution of their luminosities to quantify the number of sources producing energetic photons, as well as a determination of the mixture of stars, gas, and dust in galaxies to ascertain the likelihood the UV radiation can escape to ionise the IGM5,6. The Lyman α emission ...
... of early galaxies and the distribution of their luminosities to quantify the number of sources producing energetic photons, as well as a determination of the mixture of stars, gas, and dust in galaxies to ascertain the likelihood the UV radiation can escape to ionise the IGM5,6. The Lyman α emission ...
Outer space
Outer space, or just space, is the void that exists between celestial bodies, including the Earth. It is not completely empty, but consists of a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium as well as electromagnetic radiation, magnetic fields, neutrinos, dust and cosmic rays. The baseline temperature, as set by the background radiation from the Big Bang, is 2.7 kelvin (K). Plasma with a number density of less than one hydrogen atom per cubic metre and a temperature of millions of kelvin in the space between galaxies accounts for most of the baryonic (ordinary) matter in outer space; local concentrations have condensed into stars and galaxies. In most galaxies, observations provide evidence that 90% of the mass is in an unknown form, called dark matter, which interacts with other matter through gravitational but not electromagnetic forces. Data indicates that the majority of the mass-energy in the observable Universe is a poorly understood vacuum energy of space which astronomers label dark energy. Intergalactic space takes up most of the volume of the Universe, but even galaxies and star systems consist almost entirely of empty space.There is no firm boundary where space begins. However the Kármán line, at an altitude of 100 km (62 mi) above sea level, is conventionally used as the start of outer space in space treaties and for aerospace records keeping. The framework for international space law was established by the Outer Space Treaty, which was passed by the United Nations in 1967. This treaty precludes any claims of national sovereignty and permits all states to freely explore outer space. Despite the drafting of UN resolutions for the peaceful uses of outer space, anti-satellite weapons have been tested in Earth orbit.Humans began the physical exploration of space during the 20th century with the advent of high-altitude balloon flights, followed by manned rocket launches. Earth orbit was first achieved by Yuri Gagarin of the Soviet Union in 1961 and unmanned spacecraft have since reached all of the known planets in the Solar System. Due to the high cost of getting into space, manned spaceflight has been limited to low Earth orbit and the Moon.Outer space represents a challenging environment for human exploration because of the dual hazards of vacuum and radiation. Microgravity also has a negative effect on human physiology that causes both muscle atrophy and bone loss. In addition to these health and environmental issues, the economic cost of putting objects, including humans, into space is high.