Papervision3D star (sun) tutorial and source - 02
... The star’s gradient Actually, it took quite some tweaking to get a nice gradient of white in the middle and yellow to red on the edge. It’s a basic Sprite gradient fill, using three colors, alpha layering and a specific color ratio array to get the last two colors (yellow and red) on the edge. Then ...
... The star’s gradient Actually, it took quite some tweaking to get a nice gradient of white in the middle and yellow to red on the edge. It’s a basic Sprite gradient fill, using three colors, alpha layering and a specific color ratio array to get the last two colors (yellow and red) on the edge. Then ...
Ay 112 Midterm review
... that hydrogen in the stellar photosphere is almost entirely neutral, but Ca is almost entirely singly ionized. The population of the n = 2 level in H is very small and hence the Balmer hydrogen ...
... that hydrogen in the stellar photosphere is almost entirely neutral, but Ca is almost entirely singly ionized. The population of the n = 2 level in H is very small and hence the Balmer hydrogen ...
Our Local Group of Galaxies
... • This list has varied somewhat over the past decade or so as better data (e.g. deep color-magnitude diagrams) have provided better distance estimates, leading to improved LG membership (or not) classifications. ...
... • This list has varied somewhat over the past decade or so as better data (e.g. deep color-magnitude diagrams) have provided better distance estimates, leading to improved LG membership (or not) classifications. ...
Astronomy Unit 4 Galaxies
... 36. The approximate age of the universe determined by using Hubble’s Constant. __________________________________ 37. The distribution of galaxies in the universe is not ___________________, but clusters of galaxies lie within structures called ___________________ which surround empty regions called ...
... 36. The approximate age of the universe determined by using Hubble’s Constant. __________________________________ 37. The distribution of galaxies in the universe is not ___________________, but clusters of galaxies lie within structures called ___________________ which surround empty regions called ...
Is the central binary system of the planetary nebula Henize 2
... already ࣃ 0.02 R (e.g., Bloecker and Schoenberner, 1991). This radius is about 30 times smaller than the radius suggested by SantanderGarcía et al. (2015). This poses a serious problem to their model. In the first of our models we investigate a case where the luminosity of the system is due to just ...
... already ࣃ 0.02 R (e.g., Bloecker and Schoenberner, 1991). This radius is about 30 times smaller than the radius suggested by SantanderGarcía et al. (2015). This poses a serious problem to their model. In the first of our models we investigate a case where the luminosity of the system is due to just ...
Star formation and internal kinematics of irregular galaxies
... shorter than the dynamical timescales within a galaxy. And a star with the same initial mass and metallicity will trace the same evolutionary track in the HR diagram, irrespective of the galaxy into which it was born. Nevertheless there must be a size scale where the dynamical environment begins to ...
... shorter than the dynamical timescales within a galaxy. And a star with the same initial mass and metallicity will trace the same evolutionary track in the HR diagram, irrespective of the galaxy into which it was born. Nevertheless there must be a size scale where the dynamical environment begins to ...
Cepheid Calibration
... Leavitt’s job at the observatory was to measure the brightness of stars on photographic plates from Harvard’s telescopes in Massachusetts and abroad. Her product was a record of results comprising the identity of each star based on its position, and the star’s brightness on the date of the observati ...
... Leavitt’s job at the observatory was to measure the brightness of stars on photographic plates from Harvard’s telescopes in Massachusetts and abroad. Her product was a record of results comprising the identity of each star based on its position, and the star’s brightness on the date of the observati ...
Chapter 19 Stars Galaxies and the Universe
... make up a spectrum, including red, orange, yellow, green, blue, indigo, and violet. Scientists use a machine called a spectrograph to break up a star’s light into a spectrum. Each element has a particular pattern of lines that appear in an emission spectrum. The emission spectrum shows scientists wh ...
... make up a spectrum, including red, orange, yellow, green, blue, indigo, and violet. Scientists use a machine called a spectrograph to break up a star’s light into a spectrum. Each element has a particular pattern of lines that appear in an emission spectrum. The emission spectrum shows scientists wh ...
telling time at night
... Once you have determined the north direction, look up about one-third* of the way from horizon to zenith, the top of the sky. The North Star is fairly bright (second magnitude) and visible from the city, but not as bright as the brightest stars (first magnitude). The Big Dipper rotates around the No ...
... Once you have determined the north direction, look up about one-third* of the way from horizon to zenith, the top of the sky. The North Star is fairly bright (second magnitude) and visible from the city, but not as bright as the brightest stars (first magnitude). The Big Dipper rotates around the No ...
A Stars
... • B Stars (15-30,000 K): Most of H is ionized, so only very weak H lines. • A Stars (10,000 K): Ideal excitation conditions, strongest H lines. • G Stars (6000 K): Too cool, little excited H, so only weak H lines. ...
... • B Stars (15-30,000 K): Most of H is ionized, so only very weak H lines. • A Stars (10,000 K): Ideal excitation conditions, strongest H lines. • G Stars (6000 K): Too cool, little excited H, so only weak H lines. ...
StellarManual
... implicit measure of intrinsic brightness and how much energy a star is releasing per second (luminosity). Thus: Avior (m = 1.9) and Alkaid (m = 1.9) appear to be the same brightness, but Avior (M = -4.8) emits more energy than Alkaid (M = -1.8). Barnard’s Star (m = 9.5) appears brighter than Wolf 35 ...
... implicit measure of intrinsic brightness and how much energy a star is releasing per second (luminosity). Thus: Avior (m = 1.9) and Alkaid (m = 1.9) appear to be the same brightness, but Avior (M = -4.8) emits more energy than Alkaid (M = -1.8). Barnard’s Star (m = 9.5) appears brighter than Wolf 35 ...
Collapse of an unstable Neutron Star to a Black Hole
... radio telescopes. Among the known neutron stars, there are some which are in binary systems where the companion of the neutron star is either a normal star, a planet, a white dwarf or again a neutron star; unfortunately a neutron star - black hole binary system has not been found until now. The most ...
... radio telescopes. Among the known neutron stars, there are some which are in binary systems where the companion of the neutron star is either a normal star, a planet, a white dwarf or again a neutron star; unfortunately a neutron star - black hole binary system has not been found until now. The most ...
CONTINUING GALACTIC FORMATION
... time as the star is forming in the gravitational field of the galactic nucleus, and not solely by its own mass. Since the visible galaxy is about 45 million years old, it must regenerate one 45 millionth of this each year. If the Galaxy contains 10 to the tenth stars then it is producing about 200 s ...
... time as the star is forming in the gravitational field of the galactic nucleus, and not solely by its own mass. Since the visible galaxy is about 45 million years old, it must regenerate one 45 millionth of this each year. If the Galaxy contains 10 to the tenth stars then it is producing about 200 s ...
PPT presentation
... Monk et al. (1988) analysed 3.9m AAT spectra of 21 SMC and 50 LMC PNe. They found that the PN and HII region abundances of oxygen and neon agreed within the same galaxy but that the PN nitrogen was enhanced by 0.9 dex in the SMC and LMC. Interpreted as due to CN cycle processing of almost all of th ...
... Monk et al. (1988) analysed 3.9m AAT spectra of 21 SMC and 50 LMC PNe. They found that the PN and HII region abundances of oxygen and neon agreed within the same galaxy but that the PN nitrogen was enhanced by 0.9 dex in the SMC and LMC. Interpreted as due to CN cycle processing of almost all of th ...
Chapter 18 The Bizarre Stellar Graveyard What is a white dwarf
... – A black hole is a massive object whose radius is so small that the escape velocity exceeds the speed of light ...
... – A black hole is a massive object whose radius is so small that the escape velocity exceeds the speed of light ...
Observational properties of stars
... supernova has occurred in only the past 50 or so years. However supernovae have been observed throughout history – though they were not recognized as such. Usually they are considered short term events, referred to by ancient Chinese astronomers as “guest stars”. There are a few very famous observed ...
... supernova has occurred in only the past 50 or so years. However supernovae have been observed throughout history – though they were not recognized as such. Usually they are considered short term events, referred to by ancient Chinese astronomers as “guest stars”. There are a few very famous observed ...
AMNH_colloquium_2May07_v7b
... B0 V: T=30,000 K, M=20Msun, L=105Lsun O5 I: T=40,000 K, M=40Msun, L=106Lsun ...
... B0 V: T=30,000 K, M=20Msun, L=105Lsun O5 I: T=40,000 K, M=40Msun, L=106Lsun ...
Oldest SN
... this is the first record of a supernova. From the manner of drawing of the two objects, they both seem to be brighter than other stars and planets. We show that one of the objects is likely to be near-full moon and other is a probable supernova. We have searched the records of supernovae (Green, 200 ...
... this is the first record of a supernova. From the manner of drawing of the two objects, they both seem to be brighter than other stars and planets. We show that one of the objects is likely to be near-full moon and other is a probable supernova. We have searched the records of supernovae (Green, 200 ...
The hawaiian star compass and the unit circle
... spanning 11.25 degrees, i.e., 360 degrees divided by 32 (Thompson, 2005).The following seven houses repeat within each quadrant (Thompson, 2005): ◊ On either side of Hikina (east) and Komohana (west) is Lā (“Sun”), since the sun stays in this house for most of the year as it moves back and forth be ...
... spanning 11.25 degrees, i.e., 360 degrees divided by 32 (Thompson, 2005).The following seven houses repeat within each quadrant (Thompson, 2005): ◊ On either side of Hikina (east) and Komohana (west) is Lā (“Sun”), since the sun stays in this house for most of the year as it moves back and forth be ...
PSC100 Summary Chapters 1 to Chapter 9
... spectrometers and photometers to perform detailed inspections of the various frequency components and spectra elements of these signals. If we do, we can achieve phenomenal insights into the complex structure and evolution of things that are billions of light years away from us in space and which w ...
... spectrometers and photometers to perform detailed inspections of the various frequency components and spectra elements of these signals. If we do, we can achieve phenomenal insights into the complex structure and evolution of things that are billions of light years away from us in space and which w ...
3rd EXAM VERSION A key - Department of Physics and Astronomy
... A. a galaxy with streams of stars arching out from one region, as if from an explosion B. *a galaxy with an unusually large number of newborn and young stars C. a galaxy that is still in the process of formation from the intergalactic medium and is undergoing its first episode of star formation D. a ...
... A. a galaxy with streams of stars arching out from one region, as if from an explosion B. *a galaxy with an unusually large number of newborn and young stars C. a galaxy that is still in the process of formation from the intergalactic medium and is undergoing its first episode of star formation D. a ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.