Sec 30.1 - Highland High School
... The nuclear bulge and halo of the Milky Way is a globular cluster of old stars. The spiral arms of the Milky Way are made of younger stars and gaseous nebulae. Population I stars are found in the spiral arms, while Population II stars are in the central bulge and halo. ...
... The nuclear bulge and halo of the Milky Way is a globular cluster of old stars. The spiral arms of the Milky Way are made of younger stars and gaseous nebulae. Population I stars are found in the spiral arms, while Population II stars are in the central bulge and halo. ...
Spiral structure of the Third Galactic Quadrant and the solution to the
... others deserves a closer look. The photometric analysis presented in other studies were exclusively limited to CMDs. It is well known that the determination of fundamental parameters - reddening, distance, age and metallicity - is affected by a number of degeneracies (that are readily admitted by th ...
... others deserves a closer look. The photometric analysis presented in other studies were exclusively limited to CMDs. It is well known that the determination of fundamental parameters - reddening, distance, age and metallicity - is affected by a number of degeneracies (that are readily admitted by th ...
Cosmos
... discussed in my book The Dragons of Eden; likewise, I do not here discuss the life of Robert Goddard in much detail, because there is a chapter in Broca’s Brain devoted to him. But each episode of the television series follows fairly closely the corresponding chapter of this book; and I like to thin ...
... discussed in my book The Dragons of Eden; likewise, I do not here discuss the life of Robert Goddard in much detail, because there is a chapter in Broca’s Brain devoted to him. But each episode of the television series follows fairly closely the corresponding chapter of this book; and I like to thin ...
1957_boeke_cosmic view
... of comparison. Shown to the same scale are two automobiles, a smaller and a larger type, and also a strange object which at first we hardly recognize as the front part of a whale. A long and unlikely story would certainly be needed to make the presence of a whale at this place and time plausible or ...
... of comparison. Shown to the same scale are two automobiles, a smaller and a larger type, and also a strange object which at first we hardly recognize as the front part of a whale. A long and unlikely story would certainly be needed to make the presence of a whale at this place and time plausible or ...
Cosmic View The Universe in 40 Jumps
... of comparison. Shown to the same scale are two automobiles, a smaller and a larger type, and also a strange object which at first we hardly recognize as the front part of a whale. A long and unlikely story would certainly be needed to make the presence of a whale at this place and time plausible or ...
... of comparison. Shown to the same scale are two automobiles, a smaller and a larger type, and also a strange object which at first we hardly recognize as the front part of a whale. A long and unlikely story would certainly be needed to make the presence of a whale at this place and time plausible or ...
Unit 1: The Foundations of Astronomy
... 9.1 21st Century Life & Career Skills: All students will demonstrate the creative, critical thinking, collaboration, and problem-solving skills needed to function successfully as both global citizens and workers in diverse ethnic and organizational cultures. A. Critical Thinking and Problem Solving ...
... 9.1 21st Century Life & Career Skills: All students will demonstrate the creative, critical thinking, collaboration, and problem-solving skills needed to function successfully as both global citizens and workers in diverse ethnic and organizational cultures. A. Critical Thinking and Problem Solving ...
Unravelling the Origin and Evolution of Our Galaxy
... Earth). The systems have some surprising properties: two thirds of these giant planets are orbiting their host stars much closer than Mercury orbits the Sun (0.39 astronomical units), some having periods as short as 3 days. More than one third have significantly elliptical orbits, with e > 0.3, comp ...
... Earth). The systems have some surprising properties: two thirds of these giant planets are orbiting their host stars much closer than Mercury orbits the Sun (0.39 astronomical units), some having periods as short as 3 days. More than one third have significantly elliptical orbits, with e > 0.3, comp ...
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 ...
Galaxies
... away from our Milky way, with a recession velocity, vr, proportional to their distance d: ...
... away from our Milky way, with a recession velocity, vr, proportional to their distance d: ...
PH607lec12
... behind, instead of the same redshifts proportional to distance in all directions (Universe is isotropic). Thus we can measure our motion relative to the Hubble flow, which is also our motion relative to the observable Universe. A comoving observer is at rest in this special frame of reference. Our ...
... behind, instead of the same redshifts proportional to distance in all directions (Universe is isotropic). Thus we can measure our motion relative to the Hubble flow, which is also our motion relative to the observable Universe. A comoving observer is at rest in this special frame of reference. Our ...
Lectures 19-20 The Milky Way Galaxy
... Historical Models of the Milky Way Galaxy Jacobus Kapteyn (1851-1922) used star counting to confirm the Herschel model, but with much-improved methods. Now called the Kapteyn Universe. Galaxy consists of a flattened Spheroidal system with a decreasing stellar density with increasing distance from t ...
... Historical Models of the Milky Way Galaxy Jacobus Kapteyn (1851-1922) used star counting to confirm the Herschel model, but with much-improved methods. Now called the Kapteyn Universe. Galaxy consists of a flattened Spheroidal system with a decreasing stellar density with increasing distance from t ...
No Slide Title
... • describe the formation of the extra-solar planets: • Planets form from dust which agglomerates into cores which then accrete gas from a disc. • A gravitational instability in a protostellar disc creates a number of giant planets. • Both models have trouble reproducing both the observed distributio ...
... • describe the formation of the extra-solar planets: • Planets form from dust which agglomerates into cores which then accrete gas from a disc. • A gravitational instability in a protostellar disc creates a number of giant planets. • Both models have trouble reproducing both the observed distributio ...
Chapter 1 - Princeton University Press
... (the factor by which their brightness changed from brightest to faintest). Shapley could look at a particular RR Lyrae star and know its intrinsic luminosity. This was invaluable. Knowing its intrinsic luminosity, he could measure its apparent brightness in the sky and calculate its distance. The fa ...
... (the factor by which their brightness changed from brightest to faintest). Shapley could look at a particular RR Lyrae star and know its intrinsic luminosity. This was invaluable. Knowing its intrinsic luminosity, he could measure its apparent brightness in the sky and calculate its distance. The fa ...
Astronomy Chapter 17 – Galaxies A. Main Ideas 1. Discovering
... use the method of standard candles to measure the distance to distant galaxies. Using the inverse-square law and the known luminosity of Cepheid variables scientists are able to reasonable measurements of the distances involved. • Redshift and the Hubble Law ⇒ In the 1920s, astronomers discovered th ...
... use the method of standard candles to measure the distance to distant galaxies. Using the inverse-square law and the known luminosity of Cepheid variables scientists are able to reasonable measurements of the distances involved. • Redshift and the Hubble Law ⇒ In the 1920s, astronomers discovered th ...
PH607lec08
... The formula z = v / c implies that you can't have redshifts greater than one because that would give you a velocity greater than the speed of light, something not permitted by the laws of physics. ...
... The formula z = v / c implies that you can't have redshifts greater than one because that would give you a velocity greater than the speed of light, something not permitted by the laws of physics. ...
Star formation in galaxies over the last 10 billion
... A long time ago in galaxies far, far away: The HST Ultra Deep Field ...
... A long time ago in galaxies far, far away: The HST Ultra Deep Field ...
Robert_Minchin_Galaxies_2011_REU
... galaxies are often measured using the 21-cm line of neutral hydrogen. • For elliptical and spheroidal galaxies, which are gas poor, velocity dispersions from stellar spectroscopy can be used ...
... galaxies are often measured using the 21-cm line of neutral hydrogen. • For elliptical and spheroidal galaxies, which are gas poor, velocity dispersions from stellar spectroscopy can be used ...
The National Centre for Radio Astrophysics
... Supernovae and Gamma Ray bursts: Transient objects, such as supernovae and gamma-ray bursts (GRBs), represent the most energetic explosions in the Universe. A supernova, with an explosion energy 1E+51 ergs, often briefly outshines an entire galaxy before fading from view over several weeks to months ...
... Supernovae and Gamma Ray bursts: Transient objects, such as supernovae and gamma-ray bursts (GRBs), represent the most energetic explosions in the Universe. A supernova, with an explosion energy 1E+51 ergs, often briefly outshines an entire galaxy before fading from view over several weeks to months ...
has occurred over the past 14 billion years COSMIC DOWNSIZING
... which objects are in front and which are more distant — among the thousands of galaxies in a typical deep-field image. The standard way to perform this task is to obtain a spectrum of each galaxy in the image and measure its redshift. Because of the universe’s expansion, the light from distant sourc ...
... which objects are in front and which are more distant — among the thousands of galaxies in a typical deep-field image. The standard way to perform this task is to obtain a spectrum of each galaxy in the image and measure its redshift. Because of the universe’s expansion, the light from distant sourc ...
Interacting Galaxies
... Far from being solitary and isolated island universes, many galaxies are found to be interacting. Their close encounters can lead to spectacular mergers and spawn vast amounts of new star formation. Astronomers estimate that in the nearby universe, 1 out of every 20 gas-rich disk galaxies, like our ...
... Far from being solitary and isolated island universes, many galaxies are found to be interacting. Their close encounters can lead to spectacular mergers and spawn vast amounts of new star formation. Astronomers estimate that in the nearby universe, 1 out of every 20 gas-rich disk galaxies, like our ...
the Colours of rainbow the Brook
... Ans. The limitless expense of space around us is called universe. It means all existing things the whole Creation and all objects under consideration. The universe includes everything that exists the most distant star, planets. satellites, galaxies etc. No body knows how big the universe is the Sun, ...
... Ans. The limitless expense of space around us is called universe. It means all existing things the whole Creation and all objects under consideration. The universe includes everything that exists the most distant star, planets. satellites, galaxies etc. No body knows how big the universe is the Sun, ...
What is a planet? - X-ray and Observational Astronomy Group
... • The white dwarf moves relatively quickly compared to background stars in the field (see movie) • If a faint object moves with the WD, then I would get excited • But in this case, there is nothing, but we could have detected something as small as ~5MJup! ...
... • The white dwarf moves relatively quickly compared to background stars in the field (see movie) • If a faint object moves with the WD, then I would get excited • But in this case, there is nothing, but we could have detected something as small as ~5MJup! ...
24.1 Hubble`s Galaxy Classification
... process by which they explode (luckily) doesn’t allow for much variation. They can be used as “standard candles”—objects whose absolute magnitude is known, and which can therefore be used to determine distance using their apparent magnitude. This is no different from saying that if you see an RR Lyr ...
... process by which they explode (luckily) doesn’t allow for much variation. They can be used as “standard candles”—objects whose absolute magnitude is known, and which can therefore be used to determine distance using their apparent magnitude. This is no different from saying that if you see an RR Lyr ...
Galaxy Hunters Article, Cosmology Information, First Star Facts
... On that night, slightly giddy from the high altitude, Steidel played for the first time at Keck the dreamy, lullaby-like music of the alternative rock band Mazzy Star. It would soon become a coda for each night Steidel observed at Keck and a special bond between him and Dickinson, whom he had met wh ...
... On that night, slightly giddy from the high altitude, Steidel played for the first time at Keck the dreamy, lullaby-like music of the alternative rock band Mazzy Star. It would soon become a coda for each night Steidel observed at Keck and a special bond between him and Dickinson, whom he had met wh ...
Fermi paradox
The Fermi paradox (or Fermi's paradox) is the apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilizations, such as in the Drake equation, and the lack of evidence for such civilizations. The basic points of the argument, made by physicists Enrico Fermi and Michael H. Hart, are: The Sun is a typical star, and there are billions of stars in the galaxy that are billions of years older. With high probability, some of these stars will have Earth-like planets, and if the earth is typical, some might develop intelligent life. Some of these civilizations might develop interstellar travel, a step the Earth is investigating now. Even at the slow pace of currently envisioned interstellar travel, the Milky Way galaxy could be completely traversed in about a million years.According to this line of thinking, the Earth should already have been visited by extraterrestrial aliens though Fermi saw no convincing evidence of this, nor any signs of alien intelligence anywhere in the observable universe, leading him to ask, ""Where is everybody?""