Eye in the sky - Academy of Science of South Africa
... outh Africa has a long history of astronomy – right back to prehistoric times, when the early San people recorded astronomical events in their rock art, recording how they interpreted events in the world around them in terms of their known world. But this was not the only way that our early forebear ...
... outh Africa has a long history of astronomy – right back to prehistoric times, when the early San people recorded astronomical events in their rock art, recording how they interpreted events in the world around them in terms of their known world. But this was not the only way that our early forebear ...
Pair instability supernovae: Evolution, explosion, nucleosynthesis
... end of their lives, which comprise about two-third of all supernovae. These events produce neutron stars or black holes as compact remnants. It has since long been predicted that very massive star, i.e., stars above 140 solar masses, undergo a dynamical collapse due to electron-positron pair creatio ...
... end of their lives, which comprise about two-third of all supernovae. These events produce neutron stars or black holes as compact remnants. It has since long been predicted that very massive star, i.e., stars above 140 solar masses, undergo a dynamical collapse due to electron-positron pair creatio ...
Process of Science: PreMainSequence Stellar Life Tracks on the HR
... 2. All the stars in the cluster formed from the same interstellar cloud and therefore began to form at about the same time. Astronomers can therefore use star clusters as laboratories for comparing the properties of stars at about the same distance or of about the same age. ANSWER: By observing and ...
... 2. All the stars in the cluster formed from the same interstellar cloud and therefore began to form at about the same time. Astronomers can therefore use star clusters as laboratories for comparing the properties of stars at about the same distance or of about the same age. ANSWER: By observing and ...
The Strikingly Uniform, Highly Turbulent Interstellar Medium of the
... Observed at z = 4.601 and with Lbol = 3.5 × 1014 L⊙ , W2246-0526 is the most luminous galaxy known in the Universe, and hosts a deeply-buried active galactic nucleus (AGN)/super-massive black hole (SMBH). Discovered using the Wide-field Infrared Survey Explorer (WISE), W2246-0526 is classified as a ...
... Observed at z = 4.601 and with Lbol = 3.5 × 1014 L⊙ , W2246-0526 is the most luminous galaxy known in the Universe, and hosts a deeply-buried active galactic nucleus (AGN)/super-massive black hole (SMBH). Discovered using the Wide-field Infrared Survey Explorer (WISE), W2246-0526 is classified as a ...
Camelopardalis-Better-Know-A-Constellation
... Can be seen in binoculars from country skies, sometimes fools comet hunters. NGC 2403 possesses about 100 emission regions as well as 27 variable stars. Larger instruments will reveal many of these regions that seem to take on likeliness to M33. Three supernovae have been spotted in this galaxy, one ...
... Can be seen in binoculars from country skies, sometimes fools comet hunters. NGC 2403 possesses about 100 emission regions as well as 27 variable stars. Larger instruments will reveal many of these regions that seem to take on likeliness to M33. Three supernovae have been spotted in this galaxy, one ...
Introduction to Galaxies - West Jefferson Local Schools
... • orbits of stars and gas are “circular”, rotating about disk axis • star formation is on-going; it is can be fairly constant over the age of the galaxy • gas and dust mass fraction is roughly 10-50% of full disk • due on-going star formation, ages of stars widely range from age of galaxy to new • s ...
... • orbits of stars and gas are “circular”, rotating about disk axis • star formation is on-going; it is can be fairly constant over the age of the galaxy • gas and dust mass fraction is roughly 10-50% of full disk • due on-going star formation, ages of stars widely range from age of galaxy to new • s ...
Zapartas_deMink_Izzard_AA_2017
... was detected, the data provided new strong upper brightness limits, constraining the companion mass to less than 10M . This result is consistent with the theoretical predictions of our simulations and allowed a subset of formation scenarios to be ruled out. In Margutti et al. (2016), we used these s ...
... was detected, the data provided new strong upper brightness limits, constraining the companion mass to less than 10M . This result is consistent with the theoretical predictions of our simulations and allowed a subset of formation scenarios to be ruled out. In Margutti et al. (2016), we used these s ...
Astronomical Picture of the Day
... The Orion Nebula (a) is a giant cloud of gas and dust in which new stars and planets are forming. It is located about 1,500 light-years from Earth, which means the light recorded in the photograph took about 1,500 years to reach us. Thus, we see it as it was about 1,500 years ago. Photograph (b) sho ...
... The Orion Nebula (a) is a giant cloud of gas and dust in which new stars and planets are forming. It is located about 1,500 light-years from Earth, which means the light recorded in the photograph took about 1,500 years to reach us. Thus, we see it as it was about 1,500 years ago. Photograph (b) sho ...
Galaxies - University of Iowa Astrophysics
... Why are Cepheid variable stars useful in determining distances? A) They all have the same distance. B) Their luminosity can be determined from their pulsation period. C) They all have the same luminosity. D) They all have the same radius. ...
... Why are Cepheid variable stars useful in determining distances? A) They all have the same distance. B) Their luminosity can be determined from their pulsation period. C) They all have the same luminosity. D) They all have the same radius. ...
It is now recognized that the vast majority of ellipticals are of
... • Only a few E galaxies actually have flat luminosity profiles at small radii; instead, the profiles rise inward to the last measured point. • Cores may exhibit unusual kinematics; for example, about a quarter of all elliptical galaxies have cores which appear to counter-rotate with respect to the r ...
... • Only a few E galaxies actually have flat luminosity profiles at small radii; instead, the profiles rise inward to the last measured point. • Cores may exhibit unusual kinematics; for example, about a quarter of all elliptical galaxies have cores which appear to counter-rotate with respect to the r ...
Recen t Scien ti c
... About 12 of the variable sources are classied as bright transients according the the criteria that the variability factor ...
... About 12 of the variable sources are classied as bright transients according the the criteria that the variability factor ...
a changing cosmos - Whittier Union High School District
... is found to be on a collision course with Earth, so that an effort could be made to divert it. Currently, NASA carries out the “Spaceguard Survey” to find NEOs greater than 140 meters in diameter, and this program was budgeted at $4.1 million per year for FY 2006 through FY 2012. In chapter 7, we'll ...
... is found to be on a collision course with Earth, so that an effort could be made to divert it. Currently, NASA carries out the “Spaceguard Survey” to find NEOs greater than 140 meters in diameter, and this program was budgeted at $4.1 million per year for FY 2006 through FY 2012. In chapter 7, we'll ...
Criteria for Core-Collapse Supernova Explosions
... We investigate the criteria for successful core-collapse supernova explosions by Core-collapse supernovae (CCSNe) are among the most energetic events in the the neutrino mechanism. We find that a critical-luminosity/mass-accretion-rate Universe; they herald the birth of neutron stars and black holes ...
... We investigate the criteria for successful core-collapse supernova explosions by Core-collapse supernovae (CCSNe) are among the most energetic events in the the neutrino mechanism. We find that a critical-luminosity/mass-accretion-rate Universe; they herald the birth of neutron stars and black holes ...
Galaxy Notes File
... Markarian 205. The distance to NGC is 80 million light years, which Mkn 205 is 14 times farther away at a distance of 1 billion light year. The very distant quasar is nearly as bright as the much closer galaxy. The extraordinary brightness of quasars, which is a blending of the term quasi-stellar ra ...
... Markarian 205. The distance to NGC is 80 million light years, which Mkn 205 is 14 times farther away at a distance of 1 billion light year. The very distant quasar is nearly as bright as the much closer galaxy. The extraordinary brightness of quasars, which is a blending of the term quasi-stellar ra ...
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 ...
Galaxies - science9atsouthcarletonhs
... Galaxy Clusters • Most galaxies are not alone in the vast expanse of space, but are connected to one or more other galaxies by gravity • These collections of galaxies are known as galaxy clusters and they too appear to be organized into larger “superclusters” ...
... Galaxy Clusters • Most galaxies are not alone in the vast expanse of space, but are connected to one or more other galaxies by gravity • These collections of galaxies are known as galaxy clusters and they too appear to be organized into larger “superclusters” ...
19_Testbank - Lick Observatory
... 38) How do we learn about what is going on in the center of our own galaxy (the Milky Way)? A) We have learned it only recently, thanks to the great photographs obtained by the Hubble Space Telescope. B) We cannot see the galactic center with visible or ultraviolet light, but radio and X rays from t ...
... 38) How do we learn about what is going on in the center of our own galaxy (the Milky Way)? A) We have learned it only recently, thanks to the great photographs obtained by the Hubble Space Telescope. B) We cannot see the galactic center with visible or ultraviolet light, but radio and X rays from t ...
Galaxies
... 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. ...
Document
... 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. ...
Tycho Brahe
... conflicting views about the nature of the solar system. When Tycho observed the elongated path of a bright comet, it caused him to question the two current models of the solar system. He rejected the Copernican model, offering an intermediate position between it and the Ptolemaic model. His calculat ...
... conflicting views about the nature of the solar system. When Tycho observed the elongated path of a bright comet, it caused him to question the two current models of the solar system. He rejected the Copernican model, offering an intermediate position between it and the Ptolemaic model. His calculat ...
Chapter 15 THE MILKY WAY IN RELATION TO OTHER GALAXIES
... size is difficult. Although studies on photographic plates are available from the earliest days of photometry (de Vaucouleurs (1957) observed the LMC very early on in his studies and determined the exponential nature of its disk), the prime method today is the use of CCD’s behind small telescopes (o ...
... size is difficult. Although studies on photographic plates are available from the earliest days of photometry (de Vaucouleurs (1957) observed the LMC very early on in his studies and determined the exponential nature of its disk), the prime method today is the use of CCD’s behind small telescopes (o ...
neutron star
... Space Telescope in March of 2009. As seen by one of the European Southern Observatory's very large telescope units, the spectrum of the burst's fading afterglow also offered a surprising result - the distant galaxies are richer in heavy elements than the Sun, with the highest abundances ever seen in ...
... Space Telescope in March of 2009. As seen by one of the European Southern Observatory's very large telescope units, the spectrum of the burst's fading afterglow also offered a surprising result - the distant galaxies are richer in heavy elements than the Sun, with the highest abundances ever seen in ...
5 Report of the Panel on Stars and Stellar Evolution
... date will surely be found, and may be connected with gravitational waves. These advances are certain to open up a new and unexplored world of investigation on timescales from seconds to decades. In this report, the Astro2010 Science Frontiers Panel on Stars and Stellar Evolution sketches the most fe ...
... date will surely be found, and may be connected with gravitational waves. These advances are certain to open up a new and unexplored world of investigation on timescales from seconds to decades. In this report, the Astro2010 Science Frontiers Panel on Stars and Stellar Evolution sketches the most fe ...
On the nature and detectability of Type Ib/c supernova progenitors
... However, rapid expansion of the helium envelope during and after the carbon-burning phase suddenly makes these stars lumi3 ...
... However, rapid expansion of the helium envelope during and after the carbon-burning phase suddenly makes these stars lumi3 ...
History of supernova observation
The known history of supernova observation goes back to 185 CE, when, supernova SN 185 appeared, the oldest appearance of a supernova recorded by humankind. Several additional supernovae within the Milky Way galaxy have been recorded since that time, with SN 1604 being the most recent supernova to be observed in this galaxy.Since the development of the telescope, the field of supernova discovery has expanded to other galaxies. These occurrences provide important information on the distances of galaxies. Successful models of supernova behavior have also been developed, and the role of supernovae in the star formation process is now increasingly understood.