Question 1 The rings of Saturn are seen by Answer 1. reflected and
... . Two spaceships are traveling past Earth at 90% of the speed of light in opposite directions (i.e., they are approaching each other). One turns on a searchlight, which is seen by scientists aboard the other. What speed do the scientists measure for this light (c = speed of light in a vacuum)? ...
... . Two spaceships are traveling past Earth at 90% of the speed of light in opposite directions (i.e., they are approaching each other). One turns on a searchlight, which is seen by scientists aboard the other. What speed do the scientists measure for this light (c = speed of light in a vacuum)? ...
Exploring Space—The Universe: The Vast
... 1. Before viewing the video, ask students what interests them most about the universe. Is it the enormous distances? The idea of planets and galaxies far different than our own? Do they believe that there is life in other parts of the universe? Do they believe that our country and other nations shou ...
... 1. Before viewing the video, ask students what interests them most about the universe. Is it the enormous distances? The idea of planets and galaxies far different than our own? Do they believe that there is life in other parts of the universe? Do they believe that our country and other nations shou ...
Formation of Planets
... The clumps seen in these spiral waves correspond to masses similar to that of Jupiter, and when time proceeds a bit further, they indeed develop into giant planets. However, it is important to note that the disk masses are ∼ 10% of the stellar mass in both cases, and this is definitely more than wha ...
... The clumps seen in these spiral waves correspond to masses similar to that of Jupiter, and when time proceeds a bit further, they indeed develop into giant planets. However, it is important to note that the disk masses are ∼ 10% of the stellar mass in both cases, and this is definitely more than wha ...
s-process
... Significant production of r-process elements began when the metallicity of the Galaxy reached [Fe/H] = -3. The heavy n-capture elements were formed predominantly by the r-process at metallicities below [Fe/H] = -2.1. Elements from the s-process appear at a metallicity of [Fe/H] = -2.1, when low-mass ...
... Significant production of r-process elements began when the metallicity of the Galaxy reached [Fe/H] = -3. The heavy n-capture elements were formed predominantly by the r-process at metallicities below [Fe/H] = -2.1. Elements from the s-process appear at a metallicity of [Fe/H] = -2.1, when low-mass ...
The Lagoon Nebula and its Vicinity
... BS 1–3: The most prominent (BS 1) corresponds to the inner core of the H II region, centred on the Hourglass (clump HG and surroundings in Fig. 6); BS 2 (SC 8 and surroundings in Fig. 6) lies at the southern edge of the nebula, coincident with the ‘South Eastern Bright Rim’ (an ionisation front erod ...
... BS 1–3: The most prominent (BS 1) corresponds to the inner core of the H II region, centred on the Hourglass (clump HG and surroundings in Fig. 6); BS 2 (SC 8 and surroundings in Fig. 6) lies at the southern edge of the nebula, coincident with the ‘South Eastern Bright Rim’ (an ionisation front erod ...
JWST_eye - University of Arizona
... In daylight the opening in the human eye is about 1-2 millimeters across. At night the eye becomes “dark adapted” and the opening enlarges to about 6 millimeters to collect more light. The opening of JWST is 6 meters across, about 1000 times larger, so it lets in more light than the naked eye. Since ...
... In daylight the opening in the human eye is about 1-2 millimeters across. At night the eye becomes “dark adapted” and the opening enlarges to about 6 millimeters to collect more light. The opening of JWST is 6 meters across, about 1000 times larger, so it lets in more light than the naked eye. Since ...
Cepheus (constellation)
... supergiant star 980 light-years from Earth. It was discovered to be variable by John Goodricke in 1784. It varies between 3.5m and 4.4m over a period of 5 days and 9 hours. The Cepheids are a class of pulsating variable stars; Delta Cephei has a minimum size of 40 solar diameters and a maximum size ...
... supergiant star 980 light-years from Earth. It was discovered to be variable by John Goodricke in 1784. It varies between 3.5m and 4.4m over a period of 5 days and 9 hours. The Cepheids are a class of pulsating variable stars; Delta Cephei has a minimum size of 40 solar diameters and a maximum size ...
FLARESTARSINTHEORIONN EBULAREGION SUMARIO Durante
... typical T Tauri stars in which, during long periods, the strong emission lines of H, CaII and some other bright lines, plus a rather strong ultraviolet continuum, are observed; b) nebular irregular variables with possible fainter emission lines and without conspicuous ultraviolet excesses during the ...
... typical T Tauri stars in which, during long periods, the strong emission lines of H, CaII and some other bright lines, plus a rather strong ultraviolet continuum, are observed; b) nebular irregular variables with possible fainter emission lines and without conspicuous ultraviolet excesses during the ...
Wednesday, Sept. 24 - Department of Physics and Astronomy
... Interaction of Light and Matter: Recall column ...
... Interaction of Light and Matter: Recall column ...
Word version of Episode 704
... The Andromeda galaxy M31 can just, but only just, be seen with the naked eye. Its light, 2 million years old, is the oldest light you can see with the unaided eye. The Andromeda galaxy, M31, is the nearest neighbour large galaxy to our own Galaxy, the Milky Way. It is about 2.2 million light years a ...
... The Andromeda galaxy M31 can just, but only just, be seen with the naked eye. Its light, 2 million years old, is the oldest light you can see with the unaided eye. The Andromeda galaxy, M31, is the nearest neighbour large galaxy to our own Galaxy, the Milky Way. It is about 2.2 million light years a ...
Life Cycle of a Star Vocabulary
... • Gravity is 2 billion times that of the gravity on Earth. • Gravity presses the material in on itself so tightly that protons and electrons combine to make neutrons, yielding the name "neutron star”. ...
... • Gravity is 2 billion times that of the gravity on Earth. • Gravity presses the material in on itself so tightly that protons and electrons combine to make neutrons, yielding the name "neutron star”. ...
Unit 11: Stellar Evolution
... The unsupported outer regions are now free-falling toward the neutron core. The implosion is converted into an explosion by a combination of events. The infalling material will hit the surface of the incompressible neutron core with speeds approaching the speed of light. Because the core is incompre ...
... The unsupported outer regions are now free-falling toward the neutron core. The implosion is converted into an explosion by a combination of events. The infalling material will hit the surface of the incompressible neutron core with speeds approaching the speed of light. Because the core is incompre ...
Chapter 1
... are emitted from different levels with nearly the same excitation energy. However, because they have different transition probabilities and different collisional excitation rates, the relative population of the two levels or the ratio of their intensities depend on electron densities. Depending on t ...
... are emitted from different levels with nearly the same excitation energy. However, because they have different transition probabilities and different collisional excitation rates, the relative population of the two levels or the ratio of their intensities depend on electron densities. Depending on t ...
3. Solar System Formation and Early Evolution
... trigger nuclear reactions, M* < 0.08 Mx). Because of the observed universality of the IMF, a large Mmax implies a large number of stars, a small Mmax implies a small number of stars. For example, star-forming regions like Orion display stars up to 20 Mx or more, and contain altogether several thousa ...
... trigger nuclear reactions, M* < 0.08 Mx). Because of the observed universality of the IMF, a large Mmax implies a large number of stars, a small Mmax implies a small number of stars. For example, star-forming regions like Orion display stars up to 20 Mx or more, and contain altogether several thousa ...
The Astrophysical Origins of the Short
... Contaminates Sun’s molecular cloud [wind possibly triggers collapse of cloud core] (Wasserburg et al. 1994) Nearby (Type II) Supernova ...
... Contaminates Sun’s molecular cloud [wind possibly triggers collapse of cloud core] (Wasserburg et al. 1994) Nearby (Type II) Supernova ...
The Stars education kit - Student activities 11-20
... massive star in our Milky Way Galaxy – Eta Carinae. It radiates five million times more brightly than the Sun and is about 120 times more massive. It sheds about two Earth masses each day in its stellar wind. If the Sun gave off this much mass it would be gone in a mere 300 years. The star lies with ...
... massive star in our Milky Way Galaxy – Eta Carinae. It radiates five million times more brightly than the Sun and is about 120 times more massive. It sheds about two Earth masses each day in its stellar wind. If the Sun gave off this much mass it would be gone in a mere 300 years. The star lies with ...
Can we account for the dust
... Origin and evolution of dust in galaxies Can we account for the dust in galaxies by stellar sources? Mikako Matsuura Origin’s fellow, Institute of Origins, University College London M.J. Barlow, G.C. Sloan, A.A. Zijlstra, D. Stock, P.A. Whitelock, P. R. Wood, ...
... Origin and evolution of dust in galaxies Can we account for the dust in galaxies by stellar sources? Mikako Matsuura Origin’s fellow, Institute of Origins, University College London M.J. Barlow, G.C. Sloan, A.A. Zijlstra, D. Stock, P.A. Whitelock, P. R. Wood, ...
The age of elliptical galaxies and bulges in a merger model The age
... The fact remains, however, that the stellar populations of present-day elliptical galaxies appear to be rather homogeneous. The colours, mass-to-light ratios and Mg II absorption strengths of ellipticals are correlated only with their central velocity dispersions, and the scatter about these relatio ...
... The fact remains, however, that the stellar populations of present-day elliptical galaxies appear to be rather homogeneous. The colours, mass-to-light ratios and Mg II absorption strengths of ellipticals are correlated only with their central velocity dispersions, and the scatter about these relatio ...
Nearby Stars - How far away is it
... note that the outermost celestial sphere did not go away with the Copernican model. Parallax measurements showed us that the Sun was at the center of our planetary system. But no one could find any parallax in the stars – not Tycho Brahe, not Kepler, not Galileo, not ...
... note that the outermost celestial sphere did not go away with the Copernican model. Parallax measurements showed us that the Sun was at the center of our planetary system. But no one could find any parallax in the stars – not Tycho Brahe, not Kepler, not Galileo, not ...
Curriculum Vitae - Centre for Astrophysics and Supercomputing
... • May 2014: International Symposium Multi-wavelength Surveys: Galaxy formation and evolution from the early Universe to today, Dubrovnik, Croatia (contributed talk & judge on the ‘best poster’ award panel) • April 2014: Conference The formation and growth of galaxies in the young Universe, Obergurgl ...
... • May 2014: International Symposium Multi-wavelength Surveys: Galaxy formation and evolution from the early Universe to today, Dubrovnik, Croatia (contributed talk & judge on the ‘best poster’ award panel) • April 2014: Conference The formation and growth of galaxies in the young Universe, Obergurgl ...
Measuring Interstellar Extinction
... The interstellar extinction of starlight is the most indicative phenomenon revealing the presence of diffuse dark matter in the Galaxy. The first documented observation of extinction effects, appearing in the form of dark regions, is that of Sir William Herschel who in 1784 observed a section of the ...
... The interstellar extinction of starlight is the most indicative phenomenon revealing the presence of diffuse dark matter in the Galaxy. The first documented observation of extinction effects, appearing in the form of dark regions, is that of Sir William Herschel who in 1784 observed a section of the ...
The GalMer database: galaxy mergers in the virtual observatory*
... and Tables 2 and 3 for the corresponding set of parameters of intermediate and dwarf systems). Our modelled Hubble sequence capture the main properties of local galaxies. In the future we plan to extend this library to higher redshift, considering larger gas fractions for the disc galaxies. Each gal ...
... and Tables 2 and 3 for the corresponding set of parameters of intermediate and dwarf systems). Our modelled Hubble sequence capture the main properties of local galaxies. In the future we plan to extend this library to higher redshift, considering larger gas fractions for the disc galaxies. Each gal ...
black holes activity
... -Looking at the surface of the Sun it looks highly ________________ -Each granule is about 1000 km across, has a lifetime of __________________ and depending on its color light or dark will fluctuate in temperature by 500 K -Granules shows ____________________ rising up to the Photosphere The Solar ...
... -Looking at the surface of the Sun it looks highly ________________ -Each granule is about 1000 km across, has a lifetime of __________________ and depending on its color light or dark will fluctuate in temperature by 500 K -Granules shows ____________________ rising up to the Photosphere The Solar ...
ExamView - es S1 dept final.tst
... 18. Kepler’s first law states that planets orbit the sun in paths called a. ellipses. c. epicycles. b. circles. d. periods. 19. Young Earth formed a core, mantle, and crust in a process called a. layering. c. dispersion. b. settling. d. differentiation. 20. Early fresh water oceans became salty when ...
... 18. Kepler’s first law states that planets orbit the sun in paths called a. ellipses. c. epicycles. b. circles. d. periods. 19. Young Earth formed a core, mantle, and crust in a process called a. layering. c. dispersion. b. settling. d. differentiation. 20. Early fresh water oceans became salty when ...
The Magellan 20 Telescope Science Goals
... redshift survey of the same volume sampled by the lines of sight to the background galaxies would allow us to correlate the properties of gas with the positions of the galaxies embedded in it. As a concrete example, we consider a deep study of the IGM in the 2 < z < 3 epoch using Lyman-break galaxie ...
... redshift survey of the same volume sampled by the lines of sight to the background galaxies would allow us to correlate the properties of gas with the positions of the galaxies embedded in it. As a concrete example, we consider a deep study of the IGM in the 2 < z < 3 epoch using Lyman-break galaxie ...
H II region
An H II region is a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived blue stars forged in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. The first known H II region was the Orion Nebula, which was discovered in 1610 by Nicolas-Claude Fabri de Peiresc.H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II, pronounced H-two by astronomers (an H I region being neutral atomic hydrogen, and H2 being molecular hydrogen). Such regions have extremely diverse shapes, because the distribution of the stars and gas inside them is irregular. They often appear clumpy and filamentary, sometimes showing bizarre shapes such as the Horsehead Nebula. H II regions may give birth to thousands of stars over a period of several million years. In the end, supernova explosions and strong stellar winds from the most massive stars in the resulting star cluster will disperse the gases of the H II region, leaving behind a cluster of birthed stars such as the Pleiades.H II regions can be seen to considerable distances in the universe, and the study of extragalactic H II regions is important in determining the distance and chemical composition of other galaxies. Spiral and irregular galaxies contain many H II regions, while elliptical galaxies are almost devoid of them. In the spiral galaxies, including the Milky Way, H II regions are concentrated in the spiral arms, while in the irregular galaxies they are distributed chaotically. Some galaxies contain huge H II regions, which may contain tens of thousands of stars. Examples include the 30 Doradus region in the Large Magellanic Cloud and NGC 604 in the Triangulum Galaxy.