Searching for the oldest, most metal-poor stars in the SkyMapper Survey
... star and to determine the chemical abundance pattern by analysis of the metal absorption lines of the spectra of each star. The nuclear fusion in the core of the star emits light, which is then absorbed by the atoms in the atmosphere of the star, causing an absorption line to appear in the spectrum. ...
... star and to determine the chemical abundance pattern by analysis of the metal absorption lines of the spectra of each star. The nuclear fusion in the core of the star emits light, which is then absorbed by the atoms in the atmosphere of the star, causing an absorption line to appear in the spectrum. ...
comet panstarrs
... the southernmost point in its journey and will appear to change directions in the night sky. The brightening trend continues to speed up so that by mid-February, Comet PANSTARRS should be an unaided eye “fuzzy” located in the vicinity of the southern constellation of Microscopium. As it dives towa ...
... the southernmost point in its journey and will appear to change directions in the night sky. The brightening trend continues to speed up so that by mid-February, Comet PANSTARRS should be an unaided eye “fuzzy” located in the vicinity of the southern constellation of Microscopium. As it dives towa ...
astronomy of the korku tribe of india
... Abstract: The Korku are an ancient tribe of India believed to be of Austro-Asian origin. They trace their origin to the eastern Indian region of Chota Nagpur but large numbers of these people are settled in the forest reserves of central India. We visited twelve villages almost exclusively populated ...
... Abstract: The Korku are an ancient tribe of India believed to be of Austro-Asian origin. They trace their origin to the eastern Indian region of Chota Nagpur but large numbers of these people are settled in the forest reserves of central India. We visited twelve villages almost exclusively populated ...
THE MONTHLY SKY GUIDE, SIXTH EDITION
... own light but planets do not. Planets shine in the sky because they reflect the light of the Sun. They can consist mostly of rock, like our Earth, or they can be composed of gas and liquid, as are Jupiter and Saturn. Planets are always on the move, so they cannot be shown on the maps in this book. T ...
... own light but planets do not. Planets shine in the sky because they reflect the light of the Sun. They can consist mostly of rock, like our Earth, or they can be composed of gas and liquid, as are Jupiter and Saturn. Planets are always on the move, so they cannot be shown on the maps in this book. T ...
chapter 15 navigational astronomy
... The principal bodies orbiting the Sun are called planets. Nine principal planets are known: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. Of these, only four are commonly used for celestial navigation: Venus, Mars, Jupiter, and Saturn. Except for Pluto, the orbits of the ...
... The principal bodies orbiting the Sun are called planets. Nine principal planets are known: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. Of these, only four are commonly used for celestial navigation: Venus, Mars, Jupiter, and Saturn. Except for Pluto, the orbits of the ...
IFAS Novice Handbook - Indiana Astronomical Society
... last 2 stars in the Plough's 'bowl', point to Polaris, the Pole Star (celestial North); Cassiopaeia looks like a W or M, and the star clusters around it, and the radiant of the Perseids beside it; and during Winter, Orion's Belt made up of 3 stars in almost a straight line in a south-west kind of di ...
... last 2 stars in the Plough's 'bowl', point to Polaris, the Pole Star (celestial North); Cassiopaeia looks like a W or M, and the star clusters around it, and the radiant of the Perseids beside it; and during Winter, Orion's Belt made up of 3 stars in almost a straight line in a south-west kind of di ...
The Witness of the Stars
... Beigh, the Tartar prince and astronomer, about AD 1450, who gives the Arabian astronomy as it had come down from the earliest times. Modern astronomers have preserved, and still have in common use, the ancient names of over a hundred of the principal stars which have been handed down; but now these ...
... Beigh, the Tartar prince and astronomer, about AD 1450, who gives the Arabian astronomy as it had come down from the earliest times. Modern astronomers have preserved, and still have in common use, the ancient names of over a hundred of the principal stars which have been handed down; but now these ...
r202 the new astronomy
... This book containing information about 2800 stars and 88 constellations is the result of an enormous work, begun by Prof. Helmut Werner shortly after the Second World War. This project of H. Werner, who was astronomer and member of the staff of the Carl Zeiss firm was continued after his death in 19 ...
... This book containing information about 2800 stars and 88 constellations is the result of an enormous work, begun by Prof. Helmut Werner shortly after the Second World War. This project of H. Werner, who was astronomer and member of the staff of the Carl Zeiss firm was continued after his death in 19 ...
Entropy
... Data related to the entropy production of stars with different masses is given above. As is seen, ΣV changes insignificantly for the stars belonging to MS. To study this quantity in more detail, let us consider distribution of ΣV for stars belonging to the same cluster. Examples of frequency bar cha ...
... Data related to the entropy production of stars with different masses is given above. As is seen, ΣV changes insignificantly for the stars belonging to MS. To study this quantity in more detail, let us consider distribution of ΣV for stars belonging to the same cluster. Examples of frequency bar cha ...
Entropy Production of Main-Sequence Stars
... to discuss of black holes, questions connected with the accelerated expansion of the Universe, to build and generalize gravitation theories, etc. (see, e.g., [6–10]). The majority of the papers, being strictly theoretical, place principal emphasis on functional relations between variables establishe ...
... to discuss of black holes, questions connected with the accelerated expansion of the Universe, to build and generalize gravitation theories, etc. (see, e.g., [6–10]). The majority of the papers, being strictly theoretical, place principal emphasis on functional relations between variables establishe ...
The HERMES GALAH survey: overview
... HR 1614 group are rare examples of dispersed clusters which cannot be identified spatially but are still identifiable both chemically and kinematically. Most older dispersed aggregates would not now be recognisable dynamically, and chemical techniques provide the only way to identify their debris. U ...
... HR 1614 group are rare examples of dispersed clusters which cannot be identified spatially but are still identifiable both chemically and kinematically. Most older dispersed aggregates would not now be recognisable dynamically, and chemical techniques provide the only way to identify their debris. U ...
Title: Binary interaction dominates the evolution of massive stars
... interactions drastically alter the evolution and final fate of the stars and appear, by far, the most frequent evolutionary channel for massive stars. Based on calculations of binary evolution in short-period systems (6, 27-29) we also find that 20 to 30% of all O stars will merge with their compani ...
... interactions drastically alter the evolution and final fate of the stars and appear, by far, the most frequent evolutionary channel for massive stars. Based on calculations of binary evolution in short-period systems (6, 27-29) we also find that 20 to 30% of all O stars will merge with their compani ...
Thinking Outside the Sphere
... for the retrograde motion of the planets. In his scheme, each planet was attached to a small circle, called an epicycle, which moved it in a small orbit. The epicycle was attached in turn to a larger circle, or deferent, which moved around the earth. By adjusting the size and speed of these orbits, ...
... for the retrograde motion of the planets. In his scheme, each planet was attached to a small circle, called an epicycle, which moved it in a small orbit. The epicycle was attached in turn to a larger circle, or deferent, which moved around the earth. By adjusting the size and speed of these orbits, ...
Ch 11a (Measuring Stars 10-28-10)
... Distance: If you know the parallax “p” (in arcseconds) you can calculate the distance “d” (in parsecs) d=1/p (1parsec= 3.26 lightyears) Apparent brightness: how bright a star looks in the sky The inverse-square Law: light from stars gets fainter as the inverse square of the distance (apparent bri ...
... Distance: If you know the parallax “p” (in arcseconds) you can calculate the distance “d” (in parsecs) d=1/p (1parsec= 3.26 lightyears) Apparent brightness: how bright a star looks in the sky The inverse-square Law: light from stars gets fainter as the inverse square of the distance (apparent bri ...
NAS biographical memoir of Martin Schwarzschild
... Schwarzschild, but the early years must have been difficult. He was born to a distinguished and assimilated German-Jewish family in 1912—two years before the outbreak of World War I—when his father, Karl Schwarzschild, was director of the renowned Potsdam Observatory. This institution, said to have ...
... Schwarzschild, but the early years must have been difficult. He was born to a distinguished and assimilated German-Jewish family in 1912—two years before the outbreak of World War I—when his father, Karl Schwarzschild, was director of the renowned Potsdam Observatory. This institution, said to have ...
ppt - SLAC
... 2. Atmospheric pressure depends on the star's surface gravity and so, roughly, on its size —a giant, dwarf, or in between. The size and surface brightness yield the star's luminosity and often its evolutionary status (young, middle-aged, or nearing death). Apparent brightness then gives an idea of t ...
... 2. Atmospheric pressure depends on the star's surface gravity and so, roughly, on its size —a giant, dwarf, or in between. The size and surface brightness yield the star's luminosity and often its evolutionary status (young, middle-aged, or nearing death). Apparent brightness then gives an idea of t ...
The coronal temperatures of low-mass main
... It is very clear that the emission measure weighted average coronal temperature scales very closely with X-ray surface flux. Our scaling law between FX and coronal temperature can be used to accurately estimate the coronal average temperature of any low-mass main-sequence star when the value of FX i ...
... It is very clear that the emission measure weighted average coronal temperature scales very closely with X-ray surface flux. Our scaling law between FX and coronal temperature can be used to accurately estimate the coronal average temperature of any low-mass main-sequence star when the value of FX i ...
Tycho Brahe
... diameter globe where he would accurately fix the positions of all the stars from his observations. • 1000 stars ...
... diameter globe where he would accurately fix the positions of all the stars from his observations. • 1000 stars ...
15.1 Introduction
... Spectroscopically, WR stars are spectacular in appearance: their optical and UV spectra are dominated by strong, broad emission lines instead of the narrow absorption lines that are typical of ‘normal’ stars (Figure 15.3). The emission lines are so strong that they were first noticed as early as 186 ...
... Spectroscopically, WR stars are spectacular in appearance: their optical and UV spectra are dominated by strong, broad emission lines instead of the narrow absorption lines that are typical of ‘normal’ stars (Figure 15.3). The emission lines are so strong that they were first noticed as early as 186 ...
undergraduate celestial co
... and T = (t 2000.0)/100, with t the current date in year fractions. See example in textbook. ...
... and T = (t 2000.0)/100, with t the current date in year fractions. See example in textbook. ...
Age-Dating of Young Stars and Stellar Systems
... % of their lifetime as cool, core-He burning objects in the red part of the HRD. These stars are observationally identified as RSGs, or giants if they undergo core-helium or helium-shell flashes at masses below ∼8 M . I will later return to the importance of RSGs when emphasizing dust obscuration e ...
... % of their lifetime as cool, core-He burning objects in the red part of the HRD. These stars are observationally identified as RSGs, or giants if they undergo core-helium or helium-shell flashes at masses below ∼8 M . I will later return to the importance of RSGs when emphasizing dust obscuration e ...
Orion the Hunter
... south. Betelgeuse is a red giant half as far away as Rigel. With an angular size of over 0.1", Betelgeuse’s diameter would encompass the orbit of Jupiter. All three of Orion’s “belt stars” are blue-white suns of very similar spectral types. On transparent nights, look for the large number of 6thand ...
... south. Betelgeuse is a red giant half as far away as Rigel. With an angular size of over 0.1", Betelgeuse’s diameter would encompass the orbit of Jupiter. All three of Orion’s “belt stars” are blue-white suns of very similar spectral types. On transparent nights, look for the large number of 6thand ...
AN ANCIENT MARINER`S COMPASS: SELECTED DISCUSSION
... Figures1 to 7 are conjectural projection based on abstract (secular) archaeological members. India is also a treasure trove of icons. Icons may have been influenced by positional astronomy or may have been used to reflect astronomical aspects. We note that in literary tradition of various covenance, ...
... Figures1 to 7 are conjectural projection based on abstract (secular) archaeological members. India is also a treasure trove of icons. Icons may have been influenced by positional astronomy or may have been used to reflect astronomical aspects. We note that in literary tradition of various covenance, ...
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.