Quasars- The Brightest Black Holes
... more and more quasars to the present day – hundreds of thousands of these objects are now known. They litter the Universe; the most distant yet discovered is so far away that the time it takes its light to reach us means that we are seeing it as it was when the Universe was just 770 million years ol ...
... more and more quasars to the present day – hundreds of thousands of these objects are now known. They litter the Universe; the most distant yet discovered is so far away that the time it takes its light to reach us means that we are seeing it as it was when the Universe was just 770 million years ol ...
Milky Way Galaxy
... The Universe is filled with these star systems which themselves cluster together into larger systems. ...
... The Universe is filled with these star systems which themselves cluster together into larger systems. ...
3. Chapter 12
... cosmological red shift electromagnetic radiation galaxy light-year Oscillating theory nebula parallax planetesimal red shift revolution rotation spectroscope spectral lines triangulation ...
... cosmological red shift electromagnetic radiation galaxy light-year Oscillating theory nebula parallax planetesimal red shift revolution rotation spectroscope spectral lines triangulation ...
Galaxies - Stockton University
... decay of which powers the emission of copious amounts of high-energy electromagnetic radiation, particularly X-rays and gamma-rays. Magnetars are somewhere around 20 kilometers in diameter. Despite this, they are substantially more massive than our Sun. Magnetars are so compressed that a thimbleful ...
... decay of which powers the emission of copious amounts of high-energy electromagnetic radiation, particularly X-rays and gamma-rays. Magnetars are somewhere around 20 kilometers in diameter. Despite this, they are substantially more massive than our Sun. Magnetars are so compressed that a thimbleful ...
Pre-Lab
... category including gaseous nebulae, planetary nebulae, hazy star clusters, and faint lens-shaped formations. If these objects were nearby, with distances comparable to those of observable stars, they would have to be luminous clouds of gas within our Galaxy. If they were very remote, far beyond the ...
... category including gaseous nebulae, planetary nebulae, hazy star clusters, and faint lens-shaped formations. If these objects were nearby, with distances comparable to those of observable stars, they would have to be luminous clouds of gas within our Galaxy. If they were very remote, far beyond the ...
Dyson Spheres around White Dwarfs arXiv:1503.04376
... A Dyson Sphere represents a particular realization of the Kardashev Type II stage, the obvious way to ”catch” all the power of a star. Dyson [1] in the original paper2 points out that such a sphere would have to emit thermal radiation with total power3 equal to that of the star. Since it would look ...
... A Dyson Sphere represents a particular realization of the Kardashev Type II stage, the obvious way to ”catch” all the power of a star. Dyson [1] in the original paper2 points out that such a sphere would have to emit thermal radiation with total power3 equal to that of the star. Since it would look ...
ppt
... The measured distance to the Andromeda Galaxy was doubled in 1953 when it was discovered that there is another, dimmer type of Cepheid. At least three techniques have been used to measure distances to M31. Using the Cepheid variable method, an estimate of 2.51 ± 0.13 Mly (770 ± 40 kpc) was achieved ...
... The measured distance to the Andromeda Galaxy was doubled in 1953 when it was discovered that there is another, dimmer type of Cepheid. At least three techniques have been used to measure distances to M31. Using the Cepheid variable method, an estimate of 2.51 ± 0.13 Mly (770 ± 40 kpc) was achieved ...
Galaxy Powerpoint Notes
... The Andromeda Galaxy (M31) is named after the Greek mythology of Princess Andromeda. It is the Milky Way’s nearest neighbor in space, meaning it is the closest galaxy to ours, though it is about 2,500,000 light years away. The galaxy is about 1.5 times bigger than ours and was first seen by the nake ...
... The Andromeda Galaxy (M31) is named after the Greek mythology of Princess Andromeda. It is the Milky Way’s nearest neighbor in space, meaning it is the closest galaxy to ours, though it is about 2,500,000 light years away. The galaxy is about 1.5 times bigger than ours and was first seen by the nake ...
OUR SOLAR SYSTEM
... quiet backwater of a barred spiral galaxy known as the Milky Way, itself one of billions of galaxies. Yet at the same time, we can take heart in knowing that our little tract of the universe remains exceptional as the only place where we know life exists. Our solar system hosts one abode for life, E ...
... quiet backwater of a barred spiral galaxy known as the Milky Way, itself one of billions of galaxies. Yet at the same time, we can take heart in knowing that our little tract of the universe remains exceptional as the only place where we know life exists. Our solar system hosts one abode for life, E ...
Seeing another Earth: Detecting and Characterizing Rocky Planets
... giants. These results suggest we are entering an age of 'comparative planetology,' where we will develop observational and theoretical toolkits to understand the frequency, formation, and evolution of planets and planetary systems. The direct imaging of planetary systems is a potentially lucrative t ...
... giants. These results suggest we are entering an age of 'comparative planetology,' where we will develop observational and theoretical toolkits to understand the frequency, formation, and evolution of planets and planetary systems. The direct imaging of planetary systems is a potentially lucrative t ...
NASA FUSE Satellite Solves the Case of the Missing Deuterium
... on theory that at least a third of the deuterium would have been destroyed over time, leaving less than the amount seen in the Milky Way. But only about 15 percent of the deuterium has been destroyed, FUSE has found, suggesting that less than the amount expected has cycled through stars. "The peak g ...
... on theory that at least a third of the deuterium would have been destroyed over time, leaving less than the amount seen in the Milky Way. But only about 15 percent of the deuterium has been destroyed, FUSE has found, suggesting that less than the amount expected has cycled through stars. "The peak g ...
CHP 15
... d. they only observed stars in the disk of the galaxy and not the halo. e. they did not know about interstellar dust clouds. 2. Which of the following is not a characteristic of the stars of the disk component of our galaxy? a. circular orbits. b. randomly inclined orbits. c. higher metal abundance. ...
... d. they only observed stars in the disk of the galaxy and not the halo. e. they did not know about interstellar dust clouds. 2. Which of the following is not a characteristic of the stars of the disk component of our galaxy? a. circular orbits. b. randomly inclined orbits. c. higher metal abundance. ...
790121《Taking Back Astronomy》(Jason Lisle)
... 2,000 galaxies. Clusters of galaxies are organized into even larger superclusters—clusters of clusters. Superclusters show organization on the largest scales we can currently observe; they form an intricate web of strings and voids throughout the visible universe. Just think about the quantity of e ...
... 2,000 galaxies. Clusters of galaxies are organized into even larger superclusters—clusters of clusters. Superclusters show organization on the largest scales we can currently observe; they form an intricate web of strings and voids throughout the visible universe. Just think about the quantity of e ...
Curtis/Shapley Debate – 1920 - Tufts Institute of Cosmology
... did not always have telescopes. Humanity didn't always know the limits of our Galaxy and the existence of other galaxies - this knowledge came only this century - what was thought previously? While it is certainly true that early civilizations had a drastically different picture of the universe, the ...
... did not always have telescopes. Humanity didn't always know the limits of our Galaxy and the existence of other galaxies - this knowledge came only this century - what was thought previously? While it is certainly true that early civilizations had a drastically different picture of the universe, the ...
15-3 Notes: Galaxies
... Astronomers classify a galaxy as a spiral, elliptical, or irregular galaxy according to its shape. Spiral galaxies, such as the Andromeda galaxy, have a bulge at the center and spiral arms. The spiral arms are made up of gas, dust, and new stars that have formed. The galaxy in which we live is a spi ...
... Astronomers classify a galaxy as a spiral, elliptical, or irregular galaxy according to its shape. Spiral galaxies, such as the Andromeda galaxy, have a bulge at the center and spiral arms. The spiral arms are made up of gas, dust, and new stars that have formed. The galaxy in which we live is a spi ...
Studying the Universe Studying the Universe
... The simplest optical telescope has two lenses. One lens, called the objective lens, collects light and forms an image at the back of the telescope. The bigger the objective lens, the more light the telescope can gather. The second lens is located in the eyepiece of the telescope. This lens magnifies ...
... The simplest optical telescope has two lenses. One lens, called the objective lens, collects light and forms an image at the back of the telescope. The bigger the objective lens, the more light the telescope can gather. The second lens is located in the eyepiece of the telescope. This lens magnifies ...
presentation source
... 92% of the speed of light, giving distances of 10 13 Billion light years (ALL quasars lie at least 800 Million light years from the Milky Way). ...
... 92% of the speed of light, giving distances of 10 13 Billion light years (ALL quasars lie at least 800 Million light years from the Milky Way). ...
Sample Exam for 3 rd Astro Exam
... A. In the galactic halo. B. In the galactic nuclear bulge C. Beyond the Sun above and below the galactic mid-plane D. Perpendicular to the galactic plane. E. In the galactic mid-plane 16. True or false: The Sun is located within the galactic gas layer of the Milky Way A. True B. False C. I have no @ ...
... A. In the galactic halo. B. In the galactic nuclear bulge C. Beyond the Sun above and below the galactic mid-plane D. Perpendicular to the galactic plane. E. In the galactic mid-plane 16. True or false: The Sun is located within the galactic gas layer of the Milky Way A. True B. False C. I have no @ ...
ISP 205: Visions of the Universe
... • All other elements were made in stars and recycled into new generations of stars within galaxies. • We are “star stuff” ...
... • All other elements were made in stars and recycled into new generations of stars within galaxies. • We are “star stuff” ...
The Digital Carousel
... stars or planets, no atoms or molecules... and no life. Eons passed, and life appeared on at least one small planet orbiting an average star in a spiral galaxy called the Milky Way. On that planet, one species, endowed with the capacity to think and speak, began to wonder: Did it happen only here? P ...
... stars or planets, no atoms or molecules... and no life. Eons passed, and life appeared on at least one small planet orbiting an average star in a spiral galaxy called the Milky Way. On that planet, one species, endowed with the capacity to think and speak, began to wonder: Did it happen only here? P ...
Elliptical Galaxies
... copy of the upper branch, but its occupants all have a line of stars through the centre - a bar. The first two pictures shown on the diagram are the SB0 galaxies. The B stands for barred, and a subscript number indicates how heavily defined the bar is: to the right is an SB02 galaxy. ...
... copy of the upper branch, but its occupants all have a line of stars through the centre - a bar. The first two pictures shown on the diagram are the SB0 galaxies. The B stands for barred, and a subscript number indicates how heavily defined the bar is: to the right is an SB02 galaxy. ...
Characteristics of Our Galaxy
... While the study of the Milky Way Galaxy seems like a specific task, to truly explain its past, present, and future, and to truly understand its essence, requires one to address nearly everything but the question of multiple universes. While this is too much for the present paper, and far more than e ...
... While the study of the Milky Way Galaxy seems like a specific task, to truly explain its past, present, and future, and to truly understand its essence, requires one to address nearly everything but the question of multiple universes. While this is too much for the present paper, and far more than e ...
Quasars: Back to the Infant Universe
... Why are there few quasars close to us? Could quasars ever have existed close to us? Why is gas important? What is the merger cycle that drives quasars? Why is a quasar a phase in time rather than an object in space? ...
... Why are there few quasars close to us? Could quasars ever have existed close to us? Why is gas important? What is the merger cycle that drives quasars? Why is a quasar a phase in time rather than an object in space? ...
Multi-Wavelength Observations of Known, and Searches
... Improved point spread function. Atwood et al. (2013) 4th Fermi Symposium : Monterey, CA : 28 Oct-2 Nov 2012 ...
... Improved point spread function. Atwood et al. (2013) 4th Fermi Symposium : Monterey, CA : 28 Oct-2 Nov 2012 ...
The Habitability of Our Earth and Other Earths: Astrophysical
... Terrestrial life emerged from nonlife approximately four billion years ago (Battistuzzi et al. 2004, Sleep & Bird 2008) (Figure 1). Descriptions of where this happened include warm little ponds (Darwin 1871), hot hydrothermal vents (Wächtershäuser 2006, Martin et al. 2008), and cold little ponds ( ...
... Terrestrial life emerged from nonlife approximately four billion years ago (Battistuzzi et al. 2004, Sleep & Bird 2008) (Figure 1). Descriptions of where this happened include warm little ponds (Darwin 1871), hot hydrothermal vents (Wächtershäuser 2006, Martin et al. 2008), and cold little ponds ( ...
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?""