Star-S_Teacher_Guide - The University of Texas at Dallas
... introduction, gently guide them through the difficulties with this idea. Two major difficulties are the source of fuel and of oxygen to allow for a fire. A much less obvious problem is that fire, a chemical reaction, does not produce much energy in comparison with fusion. Before this century, the ac ...
... introduction, gently guide them through the difficulties with this idea. Two major difficulties are the source of fuel and of oxygen to allow for a fire. A much less obvious problem is that fire, a chemical reaction, does not produce much energy in comparison with fusion. Before this century, the ac ...
New Worlds, New Horizons in Astronomy and
... Cover: Complexity abounds in the universe, especially during the birth phases of stars and planetary systems. The M17 region, also known as the Omega Nebula, in the constellation Sagittarius is rich in massive stars, including those recently formed and already impacting their environment (bright neb ...
... Cover: Complexity abounds in the universe, especially during the birth phases of stars and planetary systems. The M17 region, also known as the Omega Nebula, in the constellation Sagittarius is rich in massive stars, including those recently formed and already impacting their environment (bright neb ...
Giovanni Domenico Cassini
... His expertise, however, covered many areas other than astronomy. He was an expert in hydraulics and engineering and as such was consulted regarding the dispute of 1657 between Bologna and Ferrara on the course of the River Reno. The dispute was settled by Pope Alexander VII with advice from Cassini ...
... His expertise, however, covered many areas other than astronomy. He was an expert in hydraulics and engineering and as such was consulted regarding the dispute of 1657 between Bologna and Ferrara on the course of the River Reno. The dispute was settled by Pope Alexander VII with advice from Cassini ...
THE PRIMORDIAL HELIUM ABUNDANCE Manuel Peimbert
... The determination of YP is important for at least the following reasons: (a) it is one of the pillars of Big Bang cosmology and an accurate determination of YP permits to test the Standard Big Bang Nucleosynthesis (SBBN), (b) the models of stellar evolution require an accurate initial Y value; this ...
... The determination of YP is important for at least the following reasons: (a) it is one of the pillars of Big Bang cosmology and an accurate determination of YP permits to test the Standard Big Bang Nucleosynthesis (SBBN), (b) the models of stellar evolution require an accurate initial Y value; this ...
Exploration of the Milky Way and Nearby galaxies
... such as the alpha-element Mg, are mandatory for demonstrating that the same type of stars produced the metals found in dwarf galaxies and the Galactic halo. Frebel et al. showed that the overall abundance pattern mirrors that seen in lowmetallicity halo stars, including alpha-elements. Such chemical ...
... such as the alpha-element Mg, are mandatory for demonstrating that the same type of stars produced the metals found in dwarf galaxies and the Galactic halo. Frebel et al. showed that the overall abundance pattern mirrors that seen in lowmetallicity halo stars, including alpha-elements. Such chemical ...
P - Inaf
... Observationally, obviously we cannot follow the evolution of can statistically investigate the metallicity difference betwe approach has already been successfully exploited, for ins mechanism on mass and environment15. We have used the Slo galaxies to extract a subsample of 3,905 star forming and 2 ...
... Observationally, obviously we cannot follow the evolution of can statistically investigate the metallicity difference betwe approach has already been successfully exploited, for ins mechanism on mass and environment15. We have used the Slo galaxies to extract a subsample of 3,905 star forming and 2 ...
ppt file - Universitat de Barcelona
... Interaction seems to be important in massive star-forming regions, but initial conditions must be important as well to determine the final distribution of young stellar objects in the cluster environment. ...
... Interaction seems to be important in massive star-forming regions, but initial conditions must be important as well to determine the final distribution of young stellar objects in the cluster environment. ...
Application Exercise: Distances to Stars Using Measured Parallax
... four basic methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby (e.g., the Moon), the Hubble Law being useful at the farthest distance (e.g., galaxies far, far away). In this ...
... four basic methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby (e.g., the Moon), the Hubble Law being useful at the farthest distance (e.g., galaxies far, far away). In this ...
THE NEUTRAL GAS DYNAMICS OF THE NEARBY MAGELLANIC
... allow an exploration of the interplay between ongoing star formation and the multi-phase interstellar medium (ISM). Further, nearby gas-rich systems are amenable to detailed studies of galactic rotational dynamics in the absence of differential shear. Many dwarfs display solidbody rotation that is w ...
... allow an exploration of the interplay between ongoing star formation and the multi-phase interstellar medium (ISM). Further, nearby gas-rich systems are amenable to detailed studies of galactic rotational dynamics in the absence of differential shear. Many dwarfs display solidbody rotation that is w ...
Astronomy Edexcel GCSE in Astronomy (2AS01)
... c demonstrate an understanding of the benefits of the Earth’s atmosphere to humankind d describe some of the major causes of light pollution and demonstrate an understanding of why it is undesirable to astronomers e describe how Eratosthenes made the first accurate calculation of the circumference o ...
... c demonstrate an understanding of the benefits of the Earth’s atmosphere to humankind d describe some of the major causes of light pollution and demonstrate an understanding of why it is undesirable to astronomers e describe how Eratosthenes made the first accurate calculation of the circumference o ...
Meteorites and the Early Solar System
... On 6 October 2008, a small asteroid was discovered with a flat reflectance spectrum in the 554–995 nm wavelength range, and designated 2008 TC3. It subsequently hit the Earth. Because it exploded at 37 km altitude, no macroscopic fragments were expected to survive. A dedicated search along the appr ...
... On 6 October 2008, a small asteroid was discovered with a flat reflectance spectrum in the 554–995 nm wavelength range, and designated 2008 TC3. It subsequently hit the Earth. Because it exploded at 37 km altitude, no macroscopic fragments were expected to survive. A dedicated search along the appr ...
Astronomy
... Although some radio waves are produced by astronomical objects in the form of thermal emission, most of the radio emission that is observed from Earth is seen in the form of synchrotron radiation, which is produced when electrons oscillate around magnetic fields.[33] Additionally, a number of spectr ...
... Although some radio waves are produced by astronomical objects in the form of thermal emission, most of the radio emission that is observed from Earth is seen in the form of synchrotron radiation, which is produced when electrons oscillate around magnetic fields.[33] Additionally, a number of spectr ...
Chapter 2 Surveying the stars 2.1 Star magnitudes
... Since the absorption lines vary according to temperature, they can therefore be used in addition to temperature to determine the spectral class of the star. Note that the hydrogen absorption lines correspond to excitation of hydrogen atoms from the n = 2 state to higher energy levels. These lines, r ...
... Since the absorption lines vary according to temperature, they can therefore be used in addition to temperature to determine the spectral class of the star. Note that the hydrogen absorption lines correspond to excitation of hydrogen atoms from the n = 2 state to higher energy levels. These lines, r ...
13.1 Introduction 13.2 The Red Giant Branch
... the same for all stellar masses. However, the conditions in the core at the ignition of helium are very different in low-mass stars (which have degenerate cores) from stars of higher mass (with non-degenerate cores). The electrons in the core of a 1M star are completely degenerate by the time the s ...
... the same for all stellar masses. However, the conditions in the core at the ignition of helium are very different in low-mass stars (which have degenerate cores) from stars of higher mass (with non-degenerate cores). The electrons in the core of a 1M star are completely degenerate by the time the s ...
A New Science Strategy for Space Astronomy and Astrophysics
... In 1991 the National Research Council issued a detailed strategy for astronomy and astrophysics for the next decade,1 prepared by a committee under the leadership of John Bahcall. Like previous decadal studies in this field, the report identified in priority order the most important scientific progr ...
... In 1991 the National Research Council issued a detailed strategy for astronomy and astrophysics for the next decade,1 prepared by a committee under the leadership of John Bahcall. Like previous decadal studies in this field, the report identified in priority order the most important scientific progr ...
The Galactic Environment of the Sun
... As the Local Interstellar Wind blows through our solar system, it must pass through another wind—that produced by our own sun. The solar wind is a hot plasma—consisting of charged particles (mostly protons, helium nuclei and electrons)—that streams outward from the sun at high speed. Its source is t ...
... As the Local Interstellar Wind blows through our solar system, it must pass through another wind—that produced by our own sun. The solar wind is a hot plasma—consisting of charged particles (mostly protons, helium nuclei and electrons)—that streams outward from the sun at high speed. Its source is t ...
STC-Scripting Guide for Celestia
... “What is a spectral class and what does it tell about a star and its properties?”. It might be useful for beginners, but if you already know what types of stars you want to create, you can skip them. Stars are obviously emitting light, otherwise we wouldn’t be able to see them, but they do not only ...
... “What is a spectral class and what does it tell about a star and its properties?”. It might be useful for beginners, but if you already know what types of stars you want to create, you can skip them. Stars are obviously emitting light, otherwise we wouldn’t be able to see them, but they do not only ...
The Official Magazine of the University Of St Andrews Astronomical Society 1
... parent star, with orbital periods of only a few days. Our gas giants, however, are orders of magnitude more distant from the sun than typical exoplanets are from their stars. Why is our Solar system so different to – what appears to be – the Galactic norm? In recent years, astronomers have come clos ...
... parent star, with orbital periods of only a few days. Our gas giants, however, are orders of magnitude more distant from the sun than typical exoplanets are from their stars. Why is our Solar system so different to – what appears to be – the Galactic norm? In recent years, astronomers have come clos ...
