![Spectral Matching for Elemental Abundances of Evolved Stars of Globular Clusters](http://s1.studyres.com/store/data/008087356_1-d7e55a3326165b588f321fc57738069f-300x300.png)
Spectral Matching for Elemental Abundances of Evolved Stars of Globular Clusters
... used to estimate the oxygen abundance of the stars, leading to a determination of whether a particular star was oxygen-rich or oxygen-poor. From this a catalogue of abundances of iron, carbon and barium of 848 giant branch stars were determined, of which 557 also had well-defined nitrogen abundances ...
... used to estimate the oxygen abundance of the stars, leading to a determination of whether a particular star was oxygen-rich or oxygen-poor. From this a catalogue of abundances of iron, carbon and barium of 848 giant branch stars were determined, of which 557 also had well-defined nitrogen abundances ...
Selected observation targets at a glance per constellation
... α Caeli, Alpha Caeli, F-type main-sequence star: suspected Delta Scuti type variable: exhibiting variations in luminosity as a result of both radial and non-radial pulsations on its surface + a red dwarf spectral class M, also a variable, UV Ceti type (flare star): occasionally undergoes sudden extr ...
... α Caeli, Alpha Caeli, F-type main-sequence star: suspected Delta Scuti type variable: exhibiting variations in luminosity as a result of both radial and non-radial pulsations on its surface + a red dwarf spectral class M, also a variable, UV Ceti type (flare star): occasionally undergoes sudden extr ...
The Celestial Sphere CHAPTER 1
... motion was a good approximation. Furthermore, since a geocentric model maintains circular motion, it was very difficult to make any observational distinction between geocentric and heliocentric universes. (Parallax effects are far too small to be noticeable with the naked eye.) ...
... motion was a good approximation. Furthermore, since a geocentric model maintains circular motion, it was very difficult to make any observational distinction between geocentric and heliocentric universes. (Parallax effects are far too small to be noticeable with the naked eye.) ...
Nebulae.The Lagoon and Dumbbell Nebulae
... How are nebulae formed? ..................................................................................................................................... 3 Types of nebulae ........................................................................................................................... ...
... How are nebulae formed? ..................................................................................................................................... 3 Types of nebulae ........................................................................................................................... ...
Stellarium User Guide
... 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 version of a “Presentation”, a feature that may be used to run an astronomical or other ...
... 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 version of a “Presentation”, a feature that may be used to run an astronomical or other ...
1. INTRODUCTION
... sets with more than 5 days of monitoring or with a signiÐcant number of Ñares (more than ten Ñares identiÐed by eye) were selected. Active coronal sources were our prime choice, as these stars often show several distinct stochastic events. We have focused our analysis on young, active stars that do ...
... sets with more than 5 days of monitoring or with a signiÐcant number of Ñares (more than ten Ñares identiÐed by eye) were selected. Active coronal sources were our prime choice, as these stars often show several distinct stochastic events. We have focused our analysis on young, active stars that do ...
Stellar Evolution Nucleosynthesis
... • Fusion progresses no further in a low-mass star because the core temperature never grows hot enough for fusion of heavier elements. (The sun is massive enough to fuse some He with C to make oxygen, but most of the C and O will be trapped forever in the white dwarf). • Degeneracy pressure supports ...
... • Fusion progresses no further in a low-mass star because the core temperature never grows hot enough for fusion of heavier elements. (The sun is massive enough to fuse some He with C to make oxygen, but most of the C and O will be trapped forever in the white dwarf). • Degeneracy pressure supports ...
orion® starseekers - NexStar Resource Site
... Figure 6. Visual accessories for the StarSeeker 80mm no longer obstructs the inner diameter of the focus barrel. Remove the protective dust cap from the focuser barrel. 2. Slide the chrome portion of the star diagonal into the eyepiece adapter. 3. Tighten the thumbscrew on the eyepiece adapter t ...
... Figure 6. Visual accessories for the StarSeeker 80mm no longer obstructs the inner diameter of the focus barrel. Remove the protective dust cap from the focuser barrel. 2. Slide the chrome portion of the star diagonal into the eyepiece adapter. 3. Tighten the thumbscrew on the eyepiece adapter t ...
Asteroid Rotation Periods
... Firstly, the asteroid’s path can be determined across the sky by measuring with precision the position of the asteroid at different dates. This will allow the determination of the asteroid’s orbit around the Sun, and therefore its path on the sky in subsequent days, months or years. Another very use ...
... Firstly, the asteroid’s path can be determined across the sky by measuring with precision the position of the asteroid at different dates. This will allow the determination of the asteroid’s orbit around the Sun, and therefore its path on the sky in subsequent days, months or years. Another very use ...
PPT - ALFALFA survey
... • The Arecibo Dual Beam Survey (ADBS) was carried out by Rosenberg & Schneider (2000). It was a drift-scan survey taken in a series of declination strips with the Arecibo 305-m telescope. The velocity limit of the ADBS is 8000 km/s (it is volume limited!). The full ADBS sample includes 265 galaxies ...
... • The Arecibo Dual Beam Survey (ADBS) was carried out by Rosenberg & Schneider (2000). It was a drift-scan survey taken in a series of declination strips with the Arecibo 305-m telescope. The velocity limit of the ADBS is 8000 km/s (it is volume limited!). The full ADBS sample includes 265 galaxies ...
Astrometry of Asteroids
... The lines of right ascension and declination are imaginary lines of course. If there’s an object in the sky whose right ascension and declination aren’t known (because it isn’t in a catalog, or because it’s moving from night to night like a planet), how do we find its coordinates? The answer is that ...
... The lines of right ascension and declination are imaginary lines of course. If there’s an object in the sky whose right ascension and declination aren’t known (because it isn’t in a catalog, or because it’s moving from night to night like a planet), how do we find its coordinates? The answer is that ...
NexStar SLT Series Manual
... The NexStar’s deluxe features combined with Celestron’s legendary optical standards give amateur astronomers one of the most sophisticated and easy to use telescopes available on the market today. Take time to read through this manual before embarking on your journey through the Universe. It may tak ...
... The NexStar’s deluxe features combined with Celestron’s legendary optical standards give amateur astronomers one of the most sophisticated and easy to use telescopes available on the market today. Take time to read through this manual before embarking on your journey through the Universe. It may tak ...
On the interpretation of stellar disc observations in terms of diameters
... factor when cos u gets very close to zero. The (essentially coinciding) positions of these inflection points of monochromatic intensity CLVs define a unique intensity radius (Baschek et al. 1991) of a very-compact-atmosphere star and are conventionally used for determining the photospheric radius of ...
... factor when cos u gets very close to zero. The (essentially coinciding) positions of these inflection points of monochromatic intensity CLVs define a unique intensity radius (Baschek et al. 1991) of a very-compact-atmosphere star and are conventionally used for determining the photospheric radius of ...
1 CHAPTER 18 SPECTROSCOPIC BINARY STARS 18.1
... distinguish the two components even with a large telescope – but we can detect the fact that there are two stars from their spectra. In favourable circumstances, two distinct spectra can be seen. It might be that the spectral types of the two components are very different – perhaps a hot A-type star ...
... distinguish the two components even with a large telescope – but we can detect the fact that there are two stars from their spectra. In favourable circumstances, two distinct spectra can be seen. It might be that the spectral types of the two components are very different – perhaps a hot A-type star ...
CH13.AST1001.S15.EDS
... Thought Question What would happen to a contracting cloud fragment if it were not able to radiate away its thermal energy? A. It would continue contracting, but its temperature would not change. B. Its mass would increase. C. Its internal pressure would increase. ...
... Thought Question What would happen to a contracting cloud fragment if it were not able to radiate away its thermal energy? A. It would continue contracting, but its temperature would not change. B. Its mass would increase. C. Its internal pressure would increase. ...
CH13.AST1001.F16.EDS
... Thought Question What would happen to a contracting cloud fragment if it were not able to radiate away its thermal energy? A. It would continue contracting, but its temperature would not change. B. Its mass would increase. C. Its internal pressure would increase. ...
... Thought Question What would happen to a contracting cloud fragment if it were not able to radiate away its thermal energy? A. It would continue contracting, but its temperature would not change. B. Its mass would increase. C. Its internal pressure would increase. ...
Right-Angle PolAR Alignment ScoPe (RAPAS) - Astro
... Important Reminder: The RAPAS Adapter must always remain attached to the scope. Only the RAPAS, itself, is removed. ...
... Important Reminder: The RAPAS Adapter must always remain attached to the scope. Only the RAPAS, itself, is removed. ...
Earth flies between sun and Jupiter on June 5
... been known since prehistoric times as a bright "wandering star". But in 1610 when Galileo first pointed a telescope at the sky he discovered Jupiter's four large moons Io, Europa, Ganymede and Callisto (now known as the Galilean moons) and recorded their motions back and forth around Jupiter. This w ...
... been known since prehistoric times as a bright "wandering star". But in 1610 when Galileo first pointed a telescope at the sky he discovered Jupiter's four large moons Io, Europa, Ganymede and Callisto (now known as the Galilean moons) and recorded their motions back and forth around Jupiter. This w ...
Habitable Zone Lifetimes of Exoplanets around Main Sequence Stars
... coincide. For example, the Sun is likely to become a red giant several billion years after the likely cessation of habitable conditions on Earth. Estimations for the termination of Earth’s biosphere have been calculated by other workers who used models optimized for this planet; we attempt a more ge ...
... coincide. For example, the Sun is likely to become a red giant several billion years after the likely cessation of habitable conditions on Earth. Estimations for the termination of Earth’s biosphere have been calculated by other workers who used models optimized for this planet; we attempt a more ge ...
Ursa Minor
![](https://en.wikipedia.org/wiki/Special:FilePath/Sidney_Hall_-_Urania's_Mirror_-_Draco_and_Ursa_Minor.jpg?width=300)
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.