sections 23-25 powerpoint
... Lenticular galaxies get their name because they are “lenslike,” but are more like spiral and barred spiral galaxies in possessing a flattened disk, rather than like elliptical galaxies which mostly possess ellipsoidal symmetry. The distinguishing feature of lenticulars is that they do not have spir ...
... Lenticular galaxies get their name because they are “lenslike,” but are more like spiral and barred spiral galaxies in possessing a flattened disk, rather than like elliptical galaxies which mostly possess ellipsoidal symmetry. The distinguishing feature of lenticulars is that they do not have spir ...
Rest of the Universe
... Other pieces of evidence came from gravitational lensing, which happens when the gravity of a large object bends the light waves around that object. Per Albert Einstein's theory of general relativity, gravity bends space (like a sumo wrestler might deform the mat he is standing on), so light rays be ...
... Other pieces of evidence came from gravitational lensing, which happens when the gravity of a large object bends the light waves around that object. Per Albert Einstein's theory of general relativity, gravity bends space (like a sumo wrestler might deform the mat he is standing on), so light rays be ...
Comets
... solid grains into higher orbits, with lower velocities and longer periods. In these new orbits, they lag behind the head of the comet. This is in contrast to the ions in plasma tails, which are low enough in mass that gravitational forces on them are negligible compared to the solar wind. ...
... solid grains into higher orbits, with lower velocities and longer periods. In these new orbits, they lag behind the head of the comet. This is in contrast to the ions in plasma tails, which are low enough in mass that gravitational forces on them are negligible compared to the solar wind. ...
instructor notes: weeks 9/10
... attraction of galaxies to each other over large scales, and need to be taken into account when determining how a galaxy is moving relative to us in the absence of local gravitational effects. ...
... attraction of galaxies to each other over large scales, and need to be taken into account when determining how a galaxy is moving relative to us in the absence of local gravitational effects. ...
Cold dark matter heats up
... (scaling approximately as r / r21, where r is the halo density and r is the radius from its centre), rolling to a steeper slope at larger radius (reaching r / r23); such behaviour is known as ‘NFW’, after the authors of a pivotal paper6. At the same time, simulations started highlighting a number of ...
... (scaling approximately as r / r21, where r is the halo density and r is the radius from its centre), rolling to a steeper slope at larger radius (reaching r / r23); such behaviour is known as ‘NFW’, after the authors of a pivotal paper6. At the same time, simulations started highlighting a number of ...
Physical and Cosmological Implications of a Possible Class of
... only one sector produces measurable effects (i.e. if superluminal particles and their influence on the ordinary sector cannot be observed). In our approach, the Michelson-Morley result is not incompatible with the existence of some ”ether” as suggested by recent results in particle physics: if the v ...
... only one sector produces measurable effects (i.e. if superluminal particles and their influence on the ordinary sector cannot be observed). In our approach, the Michelson-Morley result is not incompatible with the existence of some ”ether” as suggested by recent results in particle physics: if the v ...
17 April 2013 When Galaxies Collide Professor Carolin Crawford
... The Universe is full of galaxies – we estimate that there are at least 120 billion of them – but despite a huge range of mass and size, they mostly conform to a limited range of morphologies. Today’s lecture is going to concentrate on some of the exceptions – galaxies that appear very different from ...
... The Universe is full of galaxies – we estimate that there are at least 120 billion of them – but despite a huge range of mass and size, they mostly conform to a limited range of morphologies. Today’s lecture is going to concentrate on some of the exceptions – galaxies that appear very different from ...
Suppose you tried to determine where we are in the galaxy by
... mass of the galaxy. b) True, the Milky Way's rotation curve stops increasing well before the orbit of the Sun, indicating that the majority of the Milky Way's mass lies within the Sun's orbit. c) False, the Milky Way's rotation curve remains flat well beyond the orbit of the Sun, indicating that t ...
... mass of the galaxy. b) True, the Milky Way's rotation curve stops increasing well before the orbit of the Sun, indicating that the majority of the Milky Way's mass lies within the Sun's orbit. c) False, the Milky Way's rotation curve remains flat well beyond the orbit of the Sun, indicating that t ...
A S T R O N O M Y 1 1 0 - the Home Page for Voyager2.DVC.edu.
... how brilliant you are. It is rather like fixing a car or cooking. No matter how smart you are, it still takes all the steps and a bunch of time. It doesn’t mean that you are dumb or bad at math. It just works slowly and systematically. It is best to write out EVERY step completely. Be sure that each ...
... how brilliant you are. It is rather like fixing a car or cooking. No matter how smart you are, it still takes all the steps and a bunch of time. It doesn’t mean that you are dumb or bad at math. It just works slowly and systematically. It is best to write out EVERY step completely. Be sure that each ...
Document
... - Strong emission lines of Hα and [NII] can be more easily detected and measured than weak broad H and K absorption lines. -[Si VI]: new technique employed for the first time in the study of NGC1068 (Tecza et al.2000); -For a limited number of nearby galaxies, RC can be produced from velocity of ind ...
... - Strong emission lines of Hα and [NII] can be more easily detected and measured than weak broad H and K absorption lines. -[Si VI]: new technique employed for the first time in the study of NGC1068 (Tecza et al.2000); -For a limited number of nearby galaxies, RC can be produced from velocity of ind ...
The Theory of Everything: The Origin and Fate of the Universe
... Newton went on to show that, according to his law, gravity causes the moon to move in an elliptical orbit around the Earth and causes the Earth and the planets to follow elliptical paths around the sun. The Copernican model got rid of Ptolemy’s celestial spheres, and with them the idea that the univ ...
... Newton went on to show that, according to his law, gravity causes the moon to move in an elliptical orbit around the Earth and causes the Earth and the planets to follow elliptical paths around the sun. The Copernican model got rid of Ptolemy’s celestial spheres, and with them the idea that the univ ...
Former PARI students shine at AAS PARI Calendar
... obvious reasons and probably have originated within the inner solar system itself. It’s possible they originated elsewhere and were “captured” by the gravity of those massive gas giant planets out beyond Mars and the asteroid belt. However, some comets don’t’ return; their orbits are extremely elong ...
... obvious reasons and probably have originated within the inner solar system itself. It’s possible they originated elsewhere and were “captured” by the gravity of those massive gas giant planets out beyond Mars and the asteroid belt. However, some comets don’t’ return; their orbits are extremely elong ...
The Sun - challenge for scientists
... 0.7 % of the Hydrogen supply mass turns into energy (typical for a main sequence star) Sun loses 4,900,000 tons of mass each second. Summer University, Graz in space 2006 – Sep. 7-8, 2006, Graz ...
... 0.7 % of the Hydrogen supply mass turns into energy (typical for a main sequence star) Sun loses 4,900,000 tons of mass each second. Summer University, Graz in space 2006 – Sep. 7-8, 2006, Graz ...
VENUS EXPRESS brochure 3 - VIRTIS
... mountains. The later discovery of the nightside thermal emissions from deep inside the atmosphere of Venus provided an effective tool with which to peek through the dense clouds and study the lower atmospheric layers. The Galileo and Cassini spacecraft were the first to use this approach during thei ...
... mountains. The later discovery of the nightside thermal emissions from deep inside the atmosphere of Venus provided an effective tool with which to peek through the dense clouds and study the lower atmospheric layers. The Galileo and Cassini spacecraft were the first to use this approach during thei ...
Exospheres and Atmospheric Escape
... Those processes occurring in the upper atmosphere of a planet or planetary satellite that determine the structure of the corona and lead to molecular escape are considered in this paper. A planet’s atmosphere decreases in density with increasing altitude, thus an altitude is eventually reached above ...
... Those processes occurring in the upper atmosphere of a planet or planetary satellite that determine the structure of the corona and lead to molecular escape are considered in this paper. A planet’s atmosphere decreases in density with increasing altitude, thus an altitude is eventually reached above ...
ASTRONOMY AND ASTROPHYSICS (ASTRO)
... The course combines material on common naked-eye phenomena, such as daily and seasonal variations in the sky, with information on how these helped navigators determine where they are on Earth. The course "lectures" are on-line, interactive units with build in exercises, hands-on (offline) activities ...
... The course combines material on common naked-eye phenomena, such as daily and seasonal variations in the sky, with information on how these helped navigators determine where they are on Earth. The course "lectures" are on-line, interactive units with build in exercises, hands-on (offline) activities ...
The Astrophysics of Planetary Habitability
... 1.1. Factors Affecting The Nature and Identification of Exoplanet Habitability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 1.2. The Bombardment History of the Early Earth . . . . . . . . . . . . . 26 2. The Host Star . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
... 1.1. Factors Affecting The Nature and Identification of Exoplanet Habitability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 1.2. The Bombardment History of the Early Earth . . . . . . . . . . . . . 26 2. The Host Star . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
candels
... Emission Line Galaxies at z~2: A Mix of Nuclear Activity and Low-Metallicity Star Formation ...
... Emission Line Galaxies at z~2: A Mix of Nuclear Activity and Low-Metallicity Star Formation ...
Rich Clusters of Galaxies
... Galaxy clusters are the largest gravitationally bound objects in the universe. They have four major components: 1. hundreds or thousands of galaxies each containing stars, gas and dust 2. vast amounts of hot gas (visible via x-rays) with a temperature of 3x107 - 108 K. 3. intergalactic magnetic fiel ...
... Galaxy clusters are the largest gravitationally bound objects in the universe. They have four major components: 1. hundreds or thousands of galaxies each containing stars, gas and dust 2. vast amounts of hot gas (visible via x-rays) with a temperature of 3x107 - 108 K. 3. intergalactic magnetic fiel ...
Relocation Diffusion - Winston
... Ratio scale = ratio of map distance to earth distance. 1:10,000 means that one inch on the map equals 10,000 inches earth’s surface; one centimeter represents 10,000 centimeters; or one foot equals 10,000 feet. Recall a small fraction has a large denominator so that 1:100,000 is a smaller scale ...
... Ratio scale = ratio of map distance to earth distance. 1:10,000 means that one inch on the map equals 10,000 inches earth’s surface; one centimeter represents 10,000 centimeters; or one foot equals 10,000 feet. Recall a small fraction has a large denominator so that 1:100,000 is a smaller scale ...
Astrophysics for Physicists.
... Sciences as well as our Joint Astronomy and Astrophysics Programme. I must have taught this course to more than half a dozen batches. Over the years, several excellent textbooks suitable for use in one-semester courses on particle physics and solid state physics have been written. The situation with ...
... Sciences as well as our Joint Astronomy and Astrophysics Programme. I must have taught this course to more than half a dozen batches. Over the years, several excellent textbooks suitable for use in one-semester courses on particle physics and solid state physics have been written. The situation with ...
Galaxies and Active Galaxies
... enough to accelerate the stars as much as they are. • Something else must be adding to the gravity of the galaxies without shining. March 7, 2006 ...
... enough to accelerate the stars as much as they are. • Something else must be adding to the gravity of the galaxies without shining. March 7, 2006 ...
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.