MUHURTHA (Electional Astrology) BV RAMAN
... horoscope, it is not necessary to go into it in detail. A number of combinations is given in ancient works to so strengthen the election chart as to make it fruitful independent of the birth influences. These details will be discussed in their appropriate places. Before we take up electional astrolo ...
... horoscope, it is not necessary to go into it in detail. A number of combinations is given in ancient works to so strengthen the election chart as to make it fruitful independent of the birth influences. These details will be discussed in their appropriate places. Before we take up electional astrolo ...
12-1 - Piscataway High School
... comparison. If, however, you know the distance to a star, you can use the inverse square relation to calculate the brightness the star would have at some standard distance. Astronomers have adopted 10 pc as the standard distance and refer to the apparent visual magnitude a star would have if it were ...
... comparison. If, however, you know the distance to a star, you can use the inverse square relation to calculate the brightness the star would have at some standard distance. Astronomers have adopted 10 pc as the standard distance and refer to the apparent visual magnitude a star would have if it were ...
hellenistic astrology as a case study of `cultural translation`
... investigate the transition and 'translation' of eastern culture into the western world. However, the aim of this dissertation is not explicitly to study the contacts between the two civilizations but to show Greek responses to, and representation of, Chaldean wisdom. It can thus be further used to e ...
... investigate the transition and 'translation' of eastern culture into the western world. However, the aim of this dissertation is not explicitly to study the contacts between the two civilizations but to show Greek responses to, and representation of, Chaldean wisdom. It can thus be further used to e ...
the strange case of claudius ptolemy
... be extant. Abu Nasr Mansur bin Ali bin Iraq prepared an Arabic version around the year 1000. There is a German translation of this version by Max Krause under the title Die SphiUik von Menelaos aus Alexandrien, Weidmannsche Buchhandlung, Berlin (1936). ...
... be extant. Abu Nasr Mansur bin Ali bin Iraq prepared an Arabic version around the year 1000. There is a German translation of this version by Max Krause under the title Die SphiUik von Menelaos aus Alexandrien, Weidmannsche Buchhandlung, Berlin (1936). ...
Observational studies of stellar rotation
... a single line profile, this method consists in cross-correlating the observed photospheric spectrum with either a template spectrum of a star of similar effective temperature and negliglible rotation (Tonry & Davies 1979) (alternatively, a nonrotating model spectrum can be used) or with a digital ma ...
... a single line profile, this method consists in cross-correlating the observed photospheric spectrum with either a template spectrum of a star of similar effective temperature and negliglible rotation (Tonry & Davies 1979) (alternatively, a nonrotating model spectrum can be used) or with a digital ma ...
Examiners` Report June 2012 GCSE Astronomy 5AS01 01
... there was a gradual increase in difficulty through the paper with relatively straightforward tasks on familiar topics at the start progressing to quite challenging questions on more complex material towards the end. With no choice of questions in paper 01, it was the examiners’ intention that a sig ...
... there was a gradual increase in difficulty through the paper with relatively straightforward tasks on familiar topics at the start progressing to quite challenging questions on more complex material towards the end. With no choice of questions in paper 01, it was the examiners’ intention that a sig ...
Stellarium User Guide
... years now and can now be called operational. The use of a script was recognised as a perfect way of arranging a display of a sequence of astronomical events from the earliest versions of Stellarium and a simple system called the Stratoscript was implemented. The scipting facility is Stellarium’s ver ...
... years now and can now be called operational. The use of a script was recognised as a perfect way of arranging a display of a sequence of astronomical events from the earliest versions of Stellarium and a simple system called the Stratoscript was implemented. The scipting facility is Stellarium’s ver ...
1998 - Universitäts-Sternwarte München
... stellar wind of giant stars, the occurrence of planetary nebulae, or the very spectacular supernova events. Nowadays, it is therefore no surprise that the ancient stars of the Galactic halo are found to be metal-poor objects – as opposed to the understanding when they were first analyzed in the 1950 ...
... stellar wind of giant stars, the occurrence of planetary nebulae, or the very spectacular supernova events. Nowadays, it is therefore no surprise that the ancient stars of the Galactic halo are found to be metal-poor objects – as opposed to the understanding when they were first analyzed in the 1950 ...
Conference Abstract Booklet here.
... stars show periodic or semi-periodic light and radial velocity fluctuations due to both radial and non-radial pulsations. A number of RCB stars are now being studied with K2. A correlation between pulsation phase and the timing of dust formation has been found in several RCB stars. This relationship ...
... stars show periodic or semi-periodic light and radial velocity fluctuations due to both radial and non-radial pulsations. A number of RCB stars are now being studied with K2. A correlation between pulsation phase and the timing of dust formation has been found in several RCB stars. This relationship ...
Chapter 1 The Discovery of Open Clusters - Willmann-Bell
... sufficiently useful that they were often used by amateur astronomers until recent times. Indeed, Herschel’s designations were used as the primary numbering system for deep-sky objects in Norton’s Star Atlas until the 18th Edition was published in 1989. Herschel also speculated on the origin of some ...
... sufficiently useful that they were often used by amateur astronomers until recent times. Indeed, Herschel’s designations were used as the primary numbering system for deep-sky objects in Norton’s Star Atlas until the 18th Edition was published in 1989. Herschel also speculated on the origin of some ...
Carbon-enhanced metal-poor stars in dwarf galaxies
... Understanding the nature of the first stars is one of the key questions of modern Cosmology. Despite extensive observational searches, truly pristine stars have so far escaped detection. Currently, the most metal-deficient star known has a total metallicity of Z ≈ 6.9 × 10−7 (Caffau et al. 2011). Th ...
... Understanding the nature of the first stars is one of the key questions of modern Cosmology. Despite extensive observational searches, truly pristine stars have so far escaped detection. Currently, the most metal-deficient star known has a total metallicity of Z ≈ 6.9 × 10−7 (Caffau et al. 2011). Th ...
Astronomy Astrophysics Detailed abundances of a large sample of giant stars in... and in the Sagittarius nucleus
... of the coolest stars (see Fig. 3) in the latter component are heavily affected by titanium oxide (TiO) bands, which severely depress the continuum, in particular in the HR13 spectral range. They were omitted from further analysis. After the first abundance analysis, we found that three stars, attribu ...
... of the coolest stars (see Fig. 3) in the latter component are heavily affected by titanium oxide (TiO) bands, which severely depress the continuum, in particular in the HR13 spectral range. They were omitted from further analysis. After the first abundance analysis, we found that three stars, attribu ...
Hunting for Substructure in the Milky Way
... the surrounding stars. This means that the angular momentum is predominantly in the direction of the North Galactic Pole. In order to conserve angular momentum, over time this orbit remains approximately circular. Astronomers measure the velocity and distances of stars to analyse the angular momentu ...
... the surrounding stars. This means that the angular momentum is predominantly in the direction of the North Galactic Pole. In order to conserve angular momentum, over time this orbit remains approximately circular. Astronomers measure the velocity and distances of stars to analyse the angular momentu ...
SherwoodWA_1973redux - Edinburgh Research Archive
... 1970; Gottesman and Davis, 1970) found that the HII regions and blue supergiants (in associations) lie within the ...
... 1970; Gottesman and Davis, 1970) found that the HII regions and blue supergiants (in associations) lie within the ...
DUSTY CIRCUMSTELLAR DISKS B. Zuckerman
... It has not been easy to find old T Tauri stars, in the 10- to 20-million-year range, because such stars are hard to identify with IR and optical techniques. Recently, surveys of X-ray emission, especially with the German ROSAT satellite, have enabled detection of many stars that appear to be old or ...
... It has not been easy to find old T Tauri stars, in the 10- to 20-million-year range, because such stars are hard to identify with IR and optical techniques. Recently, surveys of X-ray emission, especially with the German ROSAT satellite, have enabled detection of many stars that appear to be old or ...
... In the RRL data base of GEOS (2012) one can find a list of 96 times of maxima and the corresponding O-C diagram built with the ephemerides 2419130.305+0.28779276 E is reproduced in Figure 4. Visual observations show a particularly large scatter at HJD ∼ 2443800 which may be due to their larger uncer ...
How We See The Sky
... Diffraction places a limit on the resolution of an optical system. As detail becomes smaller, diffraction has a proportionally stronger “smearing” effect (failure to fully “transfer” scene contrast), diminishing the ability of the optical system to resolve fine detail. High MTF at low contrast level ...
... Diffraction places a limit on the resolution of an optical system. As detail becomes smaller, diffraction has a proportionally stronger “smearing” effect (failure to fully “transfer” scene contrast), diminishing the ability of the optical system to resolve fine detail. High MTF at low contrast level ...
Spectral classification of O–M stars on the basis of UBV photometry
... V = 15 mag only. Of course this absorption curve like the one shown in Fig. 1 can be successfully used not only for spectral classification of stars brighter than V =15 mag, but also for fainter stars. The present technique is based on the Q-method which is equally applicable for classifying both br ...
... V = 15 mag only. Of course this absorption curve like the one shown in Fig. 1 can be successfully used not only for spectral classification of stars brighter than V =15 mag, but also for fainter stars. The present technique is based on the Q-method which is equally applicable for classifying both br ...
here - NASA/IPAC Extragalactic Database
... • During the main-sequence these stars change very little in luminosity, with typically a change of only 0.2-0.4 dex. Past the main-sequence evolution in the theoretical H-R diagram, evolution is pretty much horizontal. We illustrate this in Figure 1, using the latest Geneva evolutionary tracks (Eks ...
... • During the main-sequence these stars change very little in luminosity, with typically a change of only 0.2-0.4 dex. Past the main-sequence evolution in the theoretical H-R diagram, evolution is pretty much horizontal. We illustrate this in Figure 1, using the latest Geneva evolutionary tracks (Eks ...
tut35 Magnitudes
... of asteroids, comets, and meteors. Factors such as color, albedo, and phase angles must, at times, be considered in their evaluation. The article will cover this topic with example calculations that can provide a firmer understanding of astronomical magnitudes. 1. SOME HISTORY Greek astronomers were ...
... of asteroids, comets, and meteors. Factors such as color, albedo, and phase angles must, at times, be considered in their evaluation. The article will cover this topic with example calculations that can provide a firmer understanding of astronomical magnitudes. 1. SOME HISTORY Greek astronomers were ...
Galaxies
... All objects that were seen, such as nebulae, were thought to be contained within the Milky Way There were those who disagreed with this conclusion It was not until 1924, that the true location of many of these objects was determined Astronomy 1-2 ...
... All objects that were seen, such as nebulae, were thought to be contained within the Milky Way There were those who disagreed with this conclusion It was not until 1924, that the true location of many of these objects was determined Astronomy 1-2 ...
- StealthSkater
... Can we take this dramatic scenario seriously? Did this incredible contact with aliens actually occur? O is it some kind of "hallucination" that affected both Barney and Betty Hill? The complete account of the psychiatric examination from which the details of the event emerged is related in John G. F ...
... Can we take this dramatic scenario seriously? Did this incredible contact with aliens actually occur? O is it some kind of "hallucination" that affected both Barney and Betty Hill? The complete account of the psychiatric examination from which the details of the event emerged is related in John G. F ...
A Digital Spectral Classification Atlas
... 29 are from that book), this atlas should not be redistributed either electronically or in hardcopy form. I urge you to buy the book when it comes out! Many, but not all of the spectra in this atlas were obtained with the Gray/Miller spectrograph on the 0.8 meter telescope of the Dark Sky Observator ...
... 29 are from that book), this atlas should not be redistributed either electronically or in hardcopy form. I urge you to buy the book when it comes out! Many, but not all of the spectra in this atlas were obtained with the Gray/Miller spectrograph on the 0.8 meter telescope of the Dark Sky Observator ...
Evidence for the Tidal Destruction of Hot Jupiters by Subgiant Stars
... sample consists of main-sequence A5–F0 Hipparcos stars with 0.15 < (B − V ) < 0.30 and 1.9 < MV < 2.7 (e.g., Binney & Merrifield 1998). In panels d, e, and f the control sample consists of main-sequence Hipparcos F5–G5 stars with 0.44 < (B − V ) < 0.68 and 3.5 < MV < 5.1 (e.g., Binney & Merrifield 1 ...
... sample consists of main-sequence A5–F0 Hipparcos stars with 0.15 < (B − V ) < 0.30 and 1.9 < MV < 2.7 (e.g., Binney & Merrifield 1998). In panels d, e, and f the control sample consists of main-sequence Hipparcos F5–G5 stars with 0.44 < (B − V ) < 0.68 and 3.5 < MV < 5.1 (e.g., Binney & Merrifield 1 ...
a wide-field survey for variable stars
... 1555/1554). Over 400 light-years away, at the edge of a molecular cloud, both star and nebula are seen to vary significantly in brightness but not necessarily at the same time, adding to the mystery of the intriguing region. T Tauri stars are now generally recognized as young (less than a few millio ...
... 1555/1554). Over 400 light-years away, at the edge of a molecular cloud, both star and nebula are seen to vary significantly in brightness but not necessarily at the same time, adding to the mystery of the intriguing region. T Tauri stars are now generally recognized as young (less than a few millio ...
Constellation
In modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU). These areas had their origins in Western-traditional asterisms from which the constellations take their names. There are 88 officially recognized constellations, covering the entire sky.Thus, any given point in a celestial coordinate system can unambiguously be assigned to a constellation. It is usual in astronomy to give the constellation in which a given object is found along with its coordinates in order to convey a rough idea in which part of the sky it is located. For example, saying the Horsehead Nebula is near Orion's Belt in the constellation Orion immediately locates it just south of the ecliptic and conveys that it is best observable in winter from the Northern Hemisphere.