P7 Further Physics : Observing the Universe
... The Textbook presents the content of the specification in four topics: • Observatories and telescopes highlights the use of the full electromagnetic spectrum to understand the cosmic landscape, and then describes refractors and reflectors and how they work. • Mapping the heavens discusses observatio ...
... The Textbook presents the content of the specification in four topics: • Observatories and telescopes highlights the use of the full electromagnetic spectrum to understand the cosmic landscape, and then describes refractors and reflectors and how they work. • Mapping the heavens discusses observatio ...
Temperate Earth-sized planets transiting a nearby ultracool dwarf star
... includes stars of extremely low mass as well as brown dwarfs (substellar objects not massive enough to sustain hydrogen fusion), and represents about 15 per cent of the population of astronomical objects near the Sun2. Core-accretion theory predicts that, given the small masses of these ultracool dw ...
... includes stars of extremely low mass as well as brown dwarfs (substellar objects not massive enough to sustain hydrogen fusion), and represents about 15 per cent of the population of astronomical objects near the Sun2. Core-accretion theory predicts that, given the small masses of these ultracool dw ...
The Milky Way - The Independent School
... A. The Discovery of Galaxies B. How Many Galaxies are there? C. The Shapes of Galaxies II. Measuring the Properties of Galaxies ...
... A. The Discovery of Galaxies B. How Many Galaxies are there? C. The Shapes of Galaxies II. Measuring the Properties of Galaxies ...
Dormant black holes turn into ravenous beasts when stars wake
... gun for intermediate-mass black holes (IMBH) 1,000 to 100,000 times the mass of the Sun. While there is some evidence that IMBHs lurk in the centers of dwarf galaxies and star clusters, their existence remains controversial. IMBHs could shred objects much denser than stars, such as the stellar remna ...
... gun for intermediate-mass black holes (IMBH) 1,000 to 100,000 times the mass of the Sun. While there is some evidence that IMBHs lurk in the centers of dwarf galaxies and star clusters, their existence remains controversial. IMBHs could shred objects much denser than stars, such as the stellar remna ...
Lecture Topics 1023
... ASTR 1023 Lecture Topics These are the headings of the paragraphs into which ASTR 1023 lectures are divided. Use them to check your notes for completeness, and to see how the course is organized. It is also a good idea to cross-check these topics with your reading assignments, because some topics ar ...
... ASTR 1023 Lecture Topics These are the headings of the paragraphs into which ASTR 1023 lectures are divided. Use them to check your notes for completeness, and to see how the course is organized. It is also a good idea to cross-check these topics with your reading assignments, because some topics ar ...
Hoag`s Object
... about 17±0.7 kly (5.3±0.2 kpc) while the surrounding ring has an inner 28″ diameter of 75±3 kly (24.8±1.1 kpc) and an outer 45″ diameter of 121±4 kly (39.9±1.7 kpc), which is slightly larger than the Milky Way Galaxy.[1][a] The gap separating the two stellar populations may contain some star cluster ...
... about 17±0.7 kly (5.3±0.2 kpc) while the surrounding ring has an inner 28″ diameter of 75±3 kly (24.8±1.1 kpc) and an outer 45″ diameter of 121±4 kly (39.9±1.7 kpc), which is slightly larger than the Milky Way Galaxy.[1][a] The gap separating the two stellar populations may contain some star cluster ...
Mergers of massive main sequence binaries
... comparable luminosity, i.e. massive single stars and massive unevolved binaries. ...
... comparable luminosity, i.e. massive single stars and massive unevolved binaries. ...
21. Galaxy Evolution Agenda The Monty Hall Problem/Paradox 21.1
... • What do we think is the source of power for active galactic nuclei? • We suspect that active galactic nuclei are powered by supermassive black holes that can exceed one billion solar masses. Observations of the rapid variability of active galactic nuclei tells us that their energy output comes fro ...
... • What do we think is the source of power for active galactic nuclei? • We suspect that active galactic nuclei are powered by supermassive black holes that can exceed one billion solar masses. Observations of the rapid variability of active galactic nuclei tells us that their energy output comes fro ...
Word Document - University of Iowa Astrophysics
... In the part of the sky between the constellation Bootes and the bright star Vega is the constellation of Hercules. A number of globular star clusters are found in Hercules, particularly the cluster M13. Globular star clusters are very important as clues to stellar evolution and the shape of the Milk ...
... In the part of the sky between the constellation Bootes and the bright star Vega is the constellation of Hercules. A number of globular star clusters are found in Hercules, particularly the cluster M13. Globular star clusters are very important as clues to stellar evolution and the shape of the Milk ...
Spectroscopy History
... In 1868, he made a rather starling discovery. In the spectrum of the Sun, nestled between two bright yellow sodium lines, he saw a spectral line that just was not supposed to be there. At least, it didn’t belong to any element known to chemists. Lockyer concluded that what he observed was a new elem ...
... In 1868, he made a rather starling discovery. In the spectrum of the Sun, nestled between two bright yellow sodium lines, he saw a spectral line that just was not supposed to be there. At least, it didn’t belong to any element known to chemists. Lockyer concluded that what he observed was a new elem ...
a report on pulsars, written for PHAS1901
... dispersion. All electromagnetic radiation moves at a constant speed through a vacuum, but is slowed proportionally to it's wavelength when it travels through a medium. the interstellar medium is often regarded as a vacuum, but in actual fact is occupied by atoms and free electrons, albeit at extreme ...
... dispersion. All electromagnetic radiation moves at a constant speed through a vacuum, but is slowed proportionally to it's wavelength when it travels through a medium. the interstellar medium is often regarded as a vacuum, but in actual fact is occupied by atoms and free electrons, albeit at extreme ...
The Age and Progenitor Mass of Sirius B
... The Sirius system is the fifth or sixth nearest stellar system to the Sun1 , and certainly is one of the best studied binary systems including a white dwarf component. One does not want to employ a white dwarf in a binary close enough that interactions might have affected the mass loss phases in the ...
... The Sirius system is the fifth or sixth nearest stellar system to the Sun1 , and certainly is one of the best studied binary systems including a white dwarf component. One does not want to employ a white dwarf in a binary close enough that interactions might have affected the mass loss phases in the ...
Interactive 4 - Hertzsprung-Russell Diagram Explorer
... “Show Regions” to display regions where the main sequence stars and the giants are located. Once the animation is complete, click on any part of the star’s evolutionary path on the H-R diagram to see the size, colour and the stellar properties of the star at that particular point in its life. Run th ...
... “Show Regions” to display regions where the main sequence stars and the giants are located. Once the animation is complete, click on any part of the star’s evolutionary path on the H-R diagram to see the size, colour and the stellar properties of the star at that particular point in its life. Run th ...
Magnetic fields in O-, B-and A-type stars on the main sequence
... An explanation of the observed fields of Ap stars already proposed a long time ago is the fossil origin. The fossil origin suggests that magnetic fields reside inside the star without being continuously renewed. Therefore, these fields have been formed during an early phase of the life of the star. ...
... An explanation of the observed fields of Ap stars already proposed a long time ago is the fossil origin. The fossil origin suggests that magnetic fields reside inside the star without being continuously renewed. Therefore, these fields have been formed during an early phase of the life of the star. ...
The Pleiades in the Salle des Taureaux", Grotte de Lascaux
... the oldest traditions, for example from the nomenclature in the Almanac of Fig. 4 The copperplate engraving VII from Bode, 1805. The figure of the Klaudios Ptolemaios2 (ERREN, 1967: constellation looks like the rock picture of the aurochs no. 18 in the "Salle des 320; KUNITZSCH, 1974: 268-269, 271); ...
... the oldest traditions, for example from the nomenclature in the Almanac of Fig. 4 The copperplate engraving VII from Bode, 1805. The figure of the Klaudios Ptolemaios2 (ERREN, 1967: constellation looks like the rock picture of the aurochs no. 18 in the "Salle des 320; KUNITZSCH, 1974: 268-269, 271); ...
copyright 2002 scientific american, inc.
... a mere point to a discernible disk. “Discernible” in this case means a few lightweeks across. To reach that size, the source must have been expanding at a considerable rate— close to the speed of light. The BeppoSAX and follow-up observations have transformed astronomers’ view of GRBs. The old conce ...
... a mere point to a discernible disk. “Discernible” in this case means a few lightweeks across. To reach that size, the source must have been expanding at a considerable rate— close to the speed of light. The BeppoSAX and follow-up observations have transformed astronomers’ view of GRBs. The old conce ...
The STIS CCD Spectroscopic Line Spread Functions
... (0.8width) fiducial rotated to block the star. The middle spectrum (10 seconds CR-SPLIT) brings out the nebular emission lines well above the video pickup, and the scattered starlight continuum can be seen, including the broad Balmer alpha emission, complete with a nebular absorption line. Some vid ...
... (0.8width) fiducial rotated to block the star. The middle spectrum (10 seconds CR-SPLIT) brings out the nebular emission lines well above the video pickup, and the scattered starlight continuum can be seen, including the broad Balmer alpha emission, complete with a nebular absorption line. Some vid ...
Unit 2―The Stars and Their Diurnal Motion
... Ursa Major point to the North Star. If you use them to point in the other direction, or as we say, “downward on the Celestial Sphere,” you will cut off the tail of Leo the Lion”― a constellation you might wish to find if your birthday is in August. Again, notice how one memory device leads to locati ...
... Ursa Major point to the North Star. If you use them to point in the other direction, or as we say, “downward on the Celestial Sphere,” you will cut off the tail of Leo the Lion”― a constellation you might wish to find if your birthday is in August. Again, notice how one memory device leads to locati ...
ChAPTER 10 sTARS
... b. Select a name for your constellation. In your science notebook, write why you chose that name and briefly describe your constellation. 2. On a clear night, what constellations are you able to see from your location? With the help of figures 10.3 and 10.4, identify at least 3 constellations in you ...
... b. Select a name for your constellation. In your science notebook, write why you chose that name and briefly describe your constellation. 2. On a clear night, what constellations are you able to see from your location? With the help of figures 10.3 and 10.4, identify at least 3 constellations in you ...
The Search for Worlds Like Our Own
... his so-called ‘‘great question’’ can also be formulated as a clearly defined science goal. Since the origin of life most likely requires a stable supply of energy, planets that could host life are likely to orbit within what is known as the habitable zone (HZ), a region relatively close to the paren ...
... his so-called ‘‘great question’’ can also be formulated as a clearly defined science goal. Since the origin of life most likely requires a stable supply of energy, planets that could host life are likely to orbit within what is known as the habitable zone (HZ), a region relatively close to the paren ...
here - Diana`s Fixed Stars
... Kaitos at his Midheaven, we would say there is some point where he is abandoned on a desert island, so to speak, and has some puzzlement as to how to handle his life from then on. His father was very strict with him, and set things up in his education and training so he would enter politics, and rea ...
... Kaitos at his Midheaven, we would say there is some point where he is abandoned on a desert island, so to speak, and has some puzzlement as to how to handle his life from then on. His father was very strict with him, and set things up in his education and training so he would enter politics, and rea ...
Chapter 12
... seems to move against the background even though in reality it is your head that has changed position, not your hand. This simple demonstration illustrates how parallax gives a clue to an object’s distance. If you hold your hand at different distances from your face, you will notice that the apparen ...
... seems to move against the background even though in reality it is your head that has changed position, not your hand. This simple demonstration illustrates how parallax gives a clue to an object’s distance. If you hold your hand at different distances from your face, you will notice that the apparen ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.