September 2016
... overhead is known as the Zenith or Nadir and is shown at the upper centre of the chart. The curved brown line across the sky at the bottom is the Ecliptic or Zodiac. This is the imaginary line along which the Sun, Moon and planets appear to move across the sky. The constellations through which the e ...
... overhead is known as the Zenith or Nadir and is shown at the upper centre of the chart. The curved brown line across the sky at the bottom is the Ecliptic or Zodiac. This is the imaginary line along which the Sun, Moon and planets appear to move across the sky. The constellations through which the e ...
Educator`s Guide to the Cullman Hall of the Universe, Heilbrunn
... of gravity and electromagnetism. At the same time, galaxies are colliding: smaller galaxies and surrounding gas merged to form the Milky Way, which is now on a collision course with the Andromeda Galaxy. All stars (including our Sun) are born, shine until they run out of fuel, and die. The most mass ...
... of gravity and electromagnetism. At the same time, galaxies are colliding: smaller galaxies and surrounding gas merged to form the Milky Way, which is now on a collision course with the Andromeda Galaxy. All stars (including our Sun) are born, shine until they run out of fuel, and die. The most mass ...
Document
... 2. Microlensing on isolated stellar mass BHs • There are several good candidates • But it is necessary to find the black hole ITSELF! 3. Exotic emission mechanisms • As all other exotics: interesting, but not very probable • If it works, then GLAST will show us isolated BHs 4. Runaway stars • A rare ...
... 2. Microlensing on isolated stellar mass BHs • There are several good candidates • But it is necessary to find the black hole ITSELF! 3. Exotic emission mechanisms • As all other exotics: interesting, but not very probable • If it works, then GLAST will show us isolated BHs 4. Runaway stars • A rare ...
Lecture notes
... and the temperature increases as the density of the gas increases. Initially the cloud is transparent, but it becomes opaque at a temperature of a few hundred K and a density of 10−10 to 10−9 kg m−3 . The gas is at this point mainly molecular hydrogen, but as the collapse continues the temperature i ...
... and the temperature increases as the density of the gas increases. Initially the cloud is transparent, but it becomes opaque at a temperature of a few hundred K and a density of 10−10 to 10−9 kg m−3 . The gas is at this point mainly molecular hydrogen, but as the collapse continues the temperature i ...
Red supergiants and the past of Cygnus OB2
... have already evolved away from the main sequence and that the main star-forming sites have been shifting with time. The study of this older component is made difficult by the effects of stellar evolution, and in particular by the fact that its most massive components have already disappeared as supe ...
... have already evolved away from the main sequence and that the main star-forming sites have been shifting with time. The study of this older component is made difficult by the effects of stellar evolution, and in particular by the fact that its most massive components have already disappeared as supe ...
Cassiopeia Kelly Pearce
... series measuring between about 8,000 and 9,500 light years away (Ibid). The cluster is loose and is considered to contain varying amounts of objects, with the average observed about 70 in total (Ibid). Within the field of view from Earth, M103 appears to contain an object that is not part of the sam ...
... series measuring between about 8,000 and 9,500 light years away (Ibid). The cluster is loose and is considered to contain varying amounts of objects, with the average observed about 70 in total (Ibid). Within the field of view from Earth, M103 appears to contain an object that is not part of the sam ...
16_Testbank
... D) 300 K E) 1000 K Answer: C 19) When is thermal energy trapped in the dense center of a cloud? A) when the gravity becomes so strong that photons cannot escape B) when excited molecules collide with other molecules before they can release a photon C) when the cloud becomes so hot and dense that nuc ...
... D) 300 K E) 1000 K Answer: C 19) When is thermal energy trapped in the dense center of a cloud? A) when the gravity becomes so strong that photons cannot escape B) when excited molecules collide with other molecules before they can release a photon C) when the cloud becomes so hot and dense that nuc ...
Activity : Milky Way
... of the day, we had no evidence that the spiral nebulae were not part of the entire Milky Way ‘universe’. ...
... of the day, we had no evidence that the spiral nebulae were not part of the entire Milky Way ‘universe’. ...
Lecture 2: ppt, 5 MB
... In 1994, two dozen chunks of Comet ShoemakerLevy 9 smashed into Jupiter Hubble captured the massive explosions that sent towering mushroom-shaped fireballs of hot gas into the Jovian sky Each impact left temporary black sooty scars in Jupiter's planetary clouds. ...
... In 1994, two dozen chunks of Comet ShoemakerLevy 9 smashed into Jupiter Hubble captured the massive explosions that sent towering mushroom-shaped fireballs of hot gas into the Jovian sky Each impact left temporary black sooty scars in Jupiter's planetary clouds. ...
DTU 8e Chap 17 Quasars and Other Active Galaxies
... peculiar galaxy seen in the inset, a Hubble Space Telescope image. Each of the two radio lobes extend about 160,000 light-years from the optical galaxy and contain a brilliant, condensed region of radio emission. Inset: At the heart of this system of gas lies a strange-looking galaxy that has a reds ...
... peculiar galaxy seen in the inset, a Hubble Space Telescope image. Each of the two radio lobes extend about 160,000 light-years from the optical galaxy and contain a brilliant, condensed region of radio emission. Inset: At the heart of this system of gas lies a strange-looking galaxy that has a reds ...
Volume XXVI - Royal Asiatic Society
... always there. It is composed of the first seven of the twenty eight zodiacal constellations or lunar mansions, known in China 4,500 years ago. It covers a quarter of the zodiac occupying approximately the position of the constellations, Virgo, Libra and Scorpio. The fifth of its seven asterisms is S ...
... always there. It is composed of the first seven of the twenty eight zodiacal constellations or lunar mansions, known in China 4,500 years ago. It covers a quarter of the zodiac occupying approximately the position of the constellations, Virgo, Libra and Scorpio. The fifth of its seven asterisms is S ...
Chapter14(4-7-11)
... • 14.2 Galactic Recycling (closely related to Ch. 13) • 14.3 The History of the Milky Way • 14.4 The Mysterious Galactic Center ...
... • 14.2 Galactic Recycling (closely related to Ch. 13) • 14.3 The History of the Milky Way • 14.4 The Mysterious Galactic Center ...
Have You Seen Canopus Tonight?
... or possibly to a group of very bright giants or low luminosity supergiants, all stars in old age. (Its spectral class is variously given as A9 II or F0 Ib-II for those who understand stellar spectral types.) Estimates of its absolute magnitude (actual brightness or luminosity) give values of -5.5 ma ...
... or possibly to a group of very bright giants or low luminosity supergiants, all stars in old age. (Its spectral class is variously given as A9 II or F0 Ib-II for those who understand stellar spectral types.) Estimates of its absolute magnitude (actual brightness or luminosity) give values of -5.5 ma ...
3.7 Isotope Effect - Institute for Astronomy | ETH
... interstellar medium (ISM) and the cloud from which it was formed. Fusion in the stellar interior modifies the chemical compositions of a star during its lifetime. In the stellar spectrum this chemical evolution is only apparent if a mixing of the surface layers takes place with the center or shells ...
... interstellar medium (ISM) and the cloud from which it was formed. Fusion in the stellar interior modifies the chemical compositions of a star during its lifetime. In the stellar spectrum this chemical evolution is only apparent if a mixing of the surface layers takes place with the center or shells ...
8-4.9 - S2TEM Centers SC
... 2. Ask them to share what they know about it. 3. Make sure they are aware that a galaxy is a very large collection of stars, dust, and gas held together by the force of gravity. They should also be aware that not all galaxies look the same. 4. Provide students with copies of the activity sheet and t ...
... 2. Ask them to share what they know about it. 3. Make sure they are aware that a galaxy is a very large collection of stars, dust, and gas held together by the force of gravity. They should also be aware that not all galaxies look the same. 4. Provide students with copies of the activity sheet and t ...
Chandra Observation of Pulsar Wind Nebula
... The nonthermal X-ray most probably represents the interaction between the ejecta and a bulk of materials in the interior of the remnant, which is most likely between SN ejecta and the stripped envelop of the companion star. We obtained a stripped mass of ≤0.0083Mʘ,which is consistent with that o ...
... The nonthermal X-ray most probably represents the interaction between the ejecta and a bulk of materials in the interior of the remnant, which is most likely between SN ejecta and the stripped envelop of the companion star. We obtained a stripped mass of ≤0.0083Mʘ,which is consistent with that o ...
Astronomers discovered what they thought was the first black hole
... After the mass of both the black hole and the companion star were known, in 2011 other astronomers began to work out its history. Tsing-Wai Wong, an astronomer at Northwestern University in Illinois, and his colleagues say the system was born between 8.7 and 11.4 million years ago with two massive s ...
... After the mass of both the black hole and the companion star were known, in 2011 other astronomers began to work out its history. Tsing-Wai Wong, an astronomer at Northwestern University in Illinois, and his colleagues say the system was born between 8.7 and 11.4 million years ago with two massive s ...
Basic Debris Disk Model - Institute of Astronomy
... This causes disk near planet to become aligned with the planet, but that far away keeping the initial symmetry plane ...
... This causes disk near planet to become aligned with the planet, but that far away keeping the initial symmetry plane ...
A Question of Planets - Vanderbilt University
... course at the university and it was a disaster. When class began, the professor would take roll, step up to the blackboard and begin writing and lecturing with his back to the class. When the period was up, he took roll a second time and left, without answering any questions. “That put me off of ast ...
... course at the university and it was a disaster. When class began, the professor would take roll, step up to the blackboard and begin writing and lecturing with his back to the class. When the period was up, he took roll a second time and left, without answering any questions. “That put me off of ast ...
– 1 – 1. Nucleosynthetic Yields From Various Sources
... In most modern calculations, the yield for element i is given without the detail of what was the initial form of i before nucleosynthesis, i.e. the production yield pim = (Mej )i /M. The dependence on j is treated by carrying out the calculation of yields for various stellar metallicities at each st ...
... In most modern calculations, the yield for element i is given without the detail of what was the initial form of i before nucleosynthesis, i.e. the production yield pim = (Mej )i /M. The dependence on j is treated by carrying out the calculation of yields for various stellar metallicities at each st ...
The APEX Telescope Large Area Survey of the Galaxy (ATLASGAL)
... their ionisation fronts. Another five show 6.7 GHz methanol masers, tracers of very young embedded high-mass proto stars, in similar condensations. The conclusion from this study is that more than a quarter of the bubbles could have triggered the formation of massive objects. Star formation trigger ...
... their ionisation fronts. Another five show 6.7 GHz methanol masers, tracers of very young embedded high-mass proto stars, in similar condensations. The conclusion from this study is that more than a quarter of the bubbles could have triggered the formation of massive objects. Star formation trigger ...
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.