My Constellation
... water. In most cultures, it is drawn as a man pouring water from a bucket. This may arise from the fact that the Sun enters Aquarius in early winter when the rainy season begins in many parts of the world. Õ Alpha Aquarii ("Sadalmelik") and beta Aquarii ("Sadalsuud") are twin supergiants with nearly ...
... water. In most cultures, it is drawn as a man pouring water from a bucket. This may arise from the fact that the Sun enters Aquarius in early winter when the rainy season begins in many parts of the world. Õ Alpha Aquarii ("Sadalmelik") and beta Aquarii ("Sadalsuud") are twin supergiants with nearly ...
Table of Contents - Imiloa Astronomy Center
... - The Greeks did have several interesting beliefs concerning Sirius, alpha Canis Majoris. - The Athenian New Year began with the appearance of Sirius. - He was seen as two-headed, looking back at the past year and forward to the new one. - The Dog Star was associated with the Sun, since the Sun ente ...
... - The Greeks did have several interesting beliefs concerning Sirius, alpha Canis Majoris. - The Athenian New Year began with the appearance of Sirius. - He was seen as two-headed, looking back at the past year and forward to the new one. - The Dog Star was associated with the Sun, since the Sun ente ...
3D maps of the local interstellar medium: searching for the imprints
... better in that it accounts for the expanding and rotating belt. Developing further the collision scenario, Olano (2001) modeled a 400 pc wide supercloud (SC) of 2 107 solar masses, initially moving ballistically outside the Plane and slowly rotating, then interacting with a major spiral arm ∼100 Myr ...
... better in that it accounts for the expanding and rotating belt. Developing further the collision scenario, Olano (2001) modeled a 400 pc wide supercloud (SC) of 2 107 solar masses, initially moving ballistically outside the Plane and slowly rotating, then interacting with a major spiral arm ∼100 Myr ...
The Interstellar Medium
... a. The Sun is producing calcium and iron. b. The Sun is consuming hydrogen, carbon, and oxygen. c. The heavier elements on the Sun have settled toward its center. d. The absorption lines of calcium and iron are difficult to detect at low temperature. e. Calcium and iron are in dust grains of the int ...
... a. The Sun is producing calcium and iron. b. The Sun is consuming hydrogen, carbon, and oxygen. c. The heavier elements on the Sun have settled toward its center. d. The absorption lines of calcium and iron are difficult to detect at low temperature. e. Calcium and iron are in dust grains of the int ...
Letter to the Editor The formation of bipolar planetary nebulae
... must have higher masses. These conclusions were confirmed by Górny et al. (1997). Soker & Livio (1994) suggested an explanation in the frame work of a common envelope binary, and the results in this paper provide another one which can also be used to explain why not all known close binaries have bi ...
... must have higher masses. These conclusions were confirmed by Górny et al. (1997). Soker & Livio (1994) suggested an explanation in the frame work of a common envelope binary, and the results in this paper provide another one which can also be used to explain why not all known close binaries have bi ...
Script Chapter 7 part 1
... cloud to be in gravitational equilibrium. The Jeans mass is smaller for cold, high density clouds. Similarly, for a given cloud mass and temperature, the Jeans density describes the density required to be in a gravitational equilibrium. The density can be rather low for high mass, cool clouds. The J ...
... cloud to be in gravitational equilibrium. The Jeans mass is smaller for cold, high density clouds. Similarly, for a given cloud mass and temperature, the Jeans density describes the density required to be in a gravitational equilibrium. The density can be rather low for high mass, cool clouds. The J ...
Cepheid
... In Shapley’s day, the LMC and SMC were considered as two isolated offshoots of the Milky Way, different from the spiral nebulae. We now realize that they are ‘dwarf’ galaxies in their own right (but not spirals). ...
... In Shapley’s day, the LMC and SMC were considered as two isolated offshoots of the Milky Way, different from the spiral nebulae. We now realize that they are ‘dwarf’ galaxies in their own right (but not spirals). ...
Image Analysis of Planetary Nebula NGC 6543 South Carolina State University
... observed. This could only mean that the jets are wobbling and turning on and off episodically. Nonetheless, the shape of the planetary nebula is not a geometric concept but a result of the physical processes that are constantly occurring in the nebula. Nevertheless, researchers lean toward the seco ...
... observed. This could only mean that the jets are wobbling and turning on and off episodically. Nonetheless, the shape of the planetary nebula is not a geometric concept but a result of the physical processes that are constantly occurring in the nebula. Nevertheless, researchers lean toward the seco ...
Educational Brief
... Sun. Figure 2 shows the Horsehead Nebula (nebula is a Latin word meaning cloud) - the dark area in the center of the photograph (shaped like a horse’s head) is a thick cloud of interstellar dust blocking the light. Thinner clouds of interstellar dust may dim the light passing through, without comple ...
... Sun. Figure 2 shows the Horsehead Nebula (nebula is a Latin word meaning cloud) - the dark area in the center of the photograph (shaped like a horse’s head) is a thick cloud of interstellar dust blocking the light. Thinner clouds of interstellar dust may dim the light passing through, without comple ...
PPTX
... • Present-day spectra show that star is hot again, with high-excitation emission including C IV. Current Teff ~ 95000 K • V605 Aql was a hot WD that underwent a ...
... • Present-day spectra show that star is hot again, with high-excitation emission including C IV. Current Teff ~ 95000 K • V605 Aql was a hot WD that underwent a ...
The Antares Emission Nebula and Mass Loss of α Sco A
... quantitative study of the Antares system it could be shown that the B star creates an H II region within the wind of A Sco A and that the [Fe II] lines must be formed in this H II region (Kudritzki & Reimers, 1978). Later the H II region was detected as an optically thin radio emitter with a diamete ...
... quantitative study of the Antares system it could be shown that the B star creates an H II region within the wind of A Sco A and that the [Fe II] lines must be formed in this H II region (Kudritzki & Reimers, 1978). Later the H II region was detected as an optically thin radio emitter with a diamete ...
Star Formation in Bok Globules - European Southern Observatory
... radiation fram the star is being absorbed in this shell, wh ich reemits it as infrared radiation. Its visual magnitude varies by several tenths of a magnitude in an irregular manner on timescales of days, while its infrared magnitudes have been constant over nearly two years. The luminosity of Serne ...
... radiation fram the star is being absorbed in this shell, wh ich reemits it as infrared radiation. Its visual magnitude varies by several tenths of a magnitude in an irregular manner on timescales of days, while its infrared magnitudes have been constant over nearly two years. The luminosity of Serne ...
Star Formation in Our Galaxy - Wiley-VCH
... emission at 19 µm, shows the area in more detail. To supplement this picture of the dust content, the superposed contours trace 1.3 cm radiation from heated NH3 molecules. The NH3 radio line is strongest where the dust emission is weak or absent. Since the molecule’s emission is sensitive to the amb ...
... emission at 19 µm, shows the area in more detail. To supplement this picture of the dust content, the superposed contours trace 1.3 cm radiation from heated NH3 molecules. The NH3 radio line is strongest where the dust emission is weak or absent. Since the molecule’s emission is sensitive to the amb ...
Document
... observed in the interstellar medium • Many complex molecules have been observed, including progenitors of the basic amino acids required to build life • These complex molecules can only survive in space when they are shielded by dense, dark, giant clouds containing dust • These giant clouds are inte ...
... observed in the interstellar medium • Many complex molecules have been observed, including progenitors of the basic amino acids required to build life • These complex molecules can only survive in space when they are shielded by dense, dark, giant clouds containing dust • These giant clouds are inte ...
... 1000 years. Therefore, we must ask whether or not it is plausible to find four runaway stars among 44 trapezia. Trapezia may also evolve dynamically in a less violent way, if they start out from a virialized state (Allen et al. 1974b). In this case, the time scale for their dynamical evolution is ab ...
Giant Stars
... plus a little energy 3He C + Energy •With a little higher temperature, they can add one more to make oxygen C + He O + Energy •These processes produce far less energy than hydrogen burning ...
... plus a little energy 3He C + Energy •With a little higher temperature, they can add one more to make oxygen C + He O + Energy •These processes produce far less energy than hydrogen burning ...
PPT
... Implication 1: Hot gas not only in very massive star-forming regions Previously thought supernovae or colliding winds from multiple O stars needed (Townsley et al. 2003, ApJ, 593, 874) 30 Doradus, LMC, XMM-Newton first-light image ...
... Implication 1: Hot gas not only in very massive star-forming regions Previously thought supernovae or colliding winds from multiple O stars needed (Townsley et al. 2003, ApJ, 593, 874) 30 Doradus, LMC, XMM-Newton first-light image ...
Small Wonders: Cygnus
... components of the Summer triangle – the others being Vega (Lyra) and Altair (Aquila). At mag 1.25 Deneb is the 19th brightest star in the night sky. Its brightness is somewhat amazing in relation to its distance. Most bright stars are relatively close. Not Deneb. Distance estimates place it at 3229 ...
... components of the Summer triangle – the others being Vega (Lyra) and Altair (Aquila). At mag 1.25 Deneb is the 19th brightest star in the night sky. Its brightness is somewhat amazing in relation to its distance. Most bright stars are relatively close. Not Deneb. Distance estimates place it at 3229 ...
Nebulae.The Lagoon and Dumbbell Nebulae
... The Dumbbell Nebula, also known as M27 or NGC 6853, is the first ever found planetary nebula. It is located in the Vulpecula constellation. The nebula is a remnant of a dying star which is approximately 2 times smaller than the Sun. The star is hot and blue with temperature of 85000K (Most of these ...
... The Dumbbell Nebula, also known as M27 or NGC 6853, is the first ever found planetary nebula. It is located in the Vulpecula constellation. The nebula is a remnant of a dying star which is approximately 2 times smaller than the Sun. The star is hot and blue with temperature of 85000K (Most of these ...
Planetary Nebula
... twine, is a bubble of material being blown into space by the central star’s intense “wind” of high-speed material. The nebula's glowing gases produce the colors in this image: nitrogen (red), hydrogen (green), oxygen (blue), and helium (violet). The Eskimo Nebula is about 5,000 light-years from Eart ...
... twine, is a bubble of material being blown into space by the central star’s intense “wind” of high-speed material. The nebula's glowing gases produce the colors in this image: nitrogen (red), hydrogen (green), oxygen (blue), and helium (violet). The Eskimo Nebula is about 5,000 light-years from Eart ...
Origin of the Solar System
... The embedded IR sources are regions with a large concentration of warm dust, which emit important quantities of thermal radiation. The source of energy that must feed this emission by keeping the dust grains warm enough is not seen, however, being obscured by the dust. With the aid of the IR emissio ...
... The embedded IR sources are regions with a large concentration of warm dust, which emit important quantities of thermal radiation. The source of energy that must feed this emission by keeping the dust grains warm enough is not seen, however, being obscured by the dust. With the aid of the IR emissio ...
January 2015 - Newbury Astronomical Society
... the spiral arms of spiral galaxies like our Milky Way. It is in these Nebulae, in the spiral arms, that new stars are being created. Using a moderately sized telescope the whispery structure of M42 can be seen along with the four stars that make up the trapezium group of stars at the heart of M42. ...
... the spiral arms of spiral galaxies like our Milky Way. It is in these Nebulae, in the spiral arms, that new stars are being created. Using a moderately sized telescope the whispery structure of M42 can be seen along with the four stars that make up the trapezium group of stars at the heart of M42. ...
Orion Nebula
The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula situated in the Milky Way, being south of Orion's Belt in the constellation of Orion. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across. It has a mass of about 2000 times the mass of the Sun. Older texts frequently refer to the Orion Nebula as the Great Nebula in Orion or the Great Orion Nebula.The Orion Nebula is one of the most scrutinized and photographed objects in the night sky, and is among the most intensely studied celestial features. The nebula has revealed much about the process of how stars and planetary systems are formed from collapsing clouds of gas and dust. Astronomers have directly observed protoplanetary disks, brown dwarfs, intense and turbulent motions of the gas, and the photo-ionizing effects of massive nearby stars in the nebula.