Ayres-Kepler-ASC
... • Convection zone depth (ibid); age (Mathur) • Highly demanding on precision of acoustic frequencies; requires bright stars; Sun in the “sour spot” ...
... • Convection zone depth (ibid); age (Mathur) • Highly demanding on precision of acoustic frequencies; requires bright stars; Sun in the “sour spot” ...
4 The Sun
... and called the chromosphere. At the top of the chromosphere the temperature is about 10.000 K and it increases dramatically thereafter, to about 1.000.000 K in the uppermost layer of the solar atmosphere called the corona. Due to these high temperatures all its main constituents (mostly hydrogen and ...
... and called the chromosphere. At the top of the chromosphere the temperature is about 10.000 K and it increases dramatically thereafter, to about 1.000.000 K in the uppermost layer of the solar atmosphere called the corona. Due to these high temperatures all its main constituents (mostly hydrogen and ...
The Sun and Space Objects
... energized gas that flows out from the corona at high speeds. The solar wind is deflected by the earth’s magnetic field, however this is what causes the northern and southern lights. ...
... energized gas that flows out from the corona at high speeds. The solar wind is deflected by the earth’s magnetic field, however this is what causes the northern and southern lights. ...
ASTR100 (Spring 2008) Introduction to Astronomy Our Star
... Solar activity is like “weather”… Sunspots. Solar prominences. Solar flares. Coronal mass ejections. All are related to magnetic fields. ...
... Solar activity is like “weather”… Sunspots. Solar prominences. Solar flares. Coronal mass ejections. All are related to magnetic fields. ...
6. Solar wind acceleration
... to transient flows driven by solar eruptions such as coronal mass ejections will only be shortly addressed. o The acceleration by the pressure gradient exerted on the ambient flow by waves and turbulence will be discussed, and some recent developments in theory and multi-fluid modeling be addressed. ...
... to transient flows driven by solar eruptions such as coronal mass ejections will only be shortly addressed. o The acceleration by the pressure gradient exerted on the ambient flow by waves and turbulence will be discussed, and some recent developments in theory and multi-fluid modeling be addressed. ...
Name________________ Astronomy I cans 1. What is the Big Bang
... 42. What is the period of time with the least amount of sunspots? 1900-1925 43. What was the approximate date for the most amount of sunspots ever recorded?1960 44. What has been the trend to the most (peaks) number of sunspots over the past 50 years? decrease 45. Where do coronal mass ejections com ...
... 42. What is the period of time with the least amount of sunspots? 1900-1925 43. What was the approximate date for the most amount of sunspots ever recorded?1960 44. What has been the trend to the most (peaks) number of sunspots over the past 50 years? decrease 45. Where do coronal mass ejections com ...
Dynamical Petschek Reconnection
... stable in a system with spatially uniform resistivity. Some mechanism such as anomalous resistivity or kinetic physics is needed to sustain the localized diffusion region. It is, therefor, not clear yet how fast reconnection realizes in the actual parameter of the solar corona. In order to answer to ...
... stable in a system with spatially uniform resistivity. Some mechanism such as anomalous resistivity or kinetic physics is needed to sustain the localized diffusion region. It is, therefor, not clear yet how fast reconnection realizes in the actual parameter of the solar corona. In order to answer to ...
Variability of the Sun and Its Terrestrial Impact (VarSITI)
... • Herschel was ridiculed for this report, but now we know that when there are more sunspots, the Sun emits more radiation because of the brighter regions appearing around the sunspots ...
... • Herschel was ridiculed for this report, but now we know that when there are more sunspots, the Sun emits more radiation because of the brighter regions appearing around the sunspots ...
9.2 The Solar Interior
... Areas around sunspots are active; large eruptions may occur in photosphere. Solar prominence is large sheet of ejected gas: lasts days or weeks (loop) ...
... Areas around sunspots are active; large eruptions may occur in photosphere. Solar prominence is large sheet of ejected gas: lasts days or weeks (loop) ...
The Sun - MrsAllisonMagee
... atmosphere and is the visible surface of the sun from which we see light. ...
... atmosphere and is the visible surface of the sun from which we see light. ...
Understanding Orbits
... of the solar atmosphere that emits light Chromosphere is the region between the photosphere and the corona Corona is the outermost portion of the Sun’s atmosphere ...
... of the solar atmosphere that emits light Chromosphere is the region between the photosphere and the corona Corona is the outermost portion of the Sun’s atmosphere ...
Understanding Orbits
... of the solar atmosphere that emits light Chromosphere is the region between the photosphere and the corona Corona is the outermost portion of the Sun’s atmosphere ...
... of the solar atmosphere that emits light Chromosphere is the region between the photosphere and the corona Corona is the outermost portion of the Sun’s atmosphere ...
Study Guide
... Explain the Doppler shift in terms of color and direction. If an object is moving away from us, the color spectra will shift toward red Red shift and blue shift are referred to as Doppler shifts and are named after Christian Doppler Explain sunspot cycles. They last 11 years Sunpot max = most ac ...
... Explain the Doppler shift in terms of color and direction. If an object is moving away from us, the color spectra will shift toward red Red shift and blue shift are referred to as Doppler shifts and are named after Christian Doppler Explain sunspot cycles. They last 11 years Sunpot max = most ac ...
Basic astrophysics principles would show that the
... Basic astrophysics principles would show that the trajectory of Planet X drawn in this diagram is erroneous, in that this dwarf star must be gravitationally drawn into our inner Solar System by our Sun, and, through the equilibrium of centrifugal and centripetal forces, X must loop around the Sun in ...
... Basic astrophysics principles would show that the trajectory of Planet X drawn in this diagram is erroneous, in that this dwarf star must be gravitationally drawn into our inner Solar System by our Sun, and, through the equilibrium of centrifugal and centripetal forces, X must loop around the Sun in ...
The Sun – Our Star Chapter 8 Outline
... photosphere (T ≈ 4240 K). Only appear dark against the bright sun. Would still be brighter than the full moon when placed on the night sky! ...
... photosphere (T ≈ 4240 K). Only appear dark against the bright sun. Would still be brighter than the full moon when placed on the night sky! ...
Document
... swirling iron in the Earth’s core – some 3000 kilometres beneath our feet. This invisible force reaches into space to form the magnetosphere, protecting us from the solar wind. But the magnetic field is in a constant state of flux and is showing significant weakening and could even go into reverse. ...
... swirling iron in the Earth’s core – some 3000 kilometres beneath our feet. This invisible force reaches into space to form the magnetosphere, protecting us from the solar wind. But the magnetic field is in a constant state of flux and is showing significant weakening and could even go into reverse. ...
Flares and the chromosphere Hugh S. Hudson and Lyndsay Fletcher
... been stimulated by the observational analogies one can draw between the phenomena (e.g., Obayashi, 1975). The analogous elements include ribbon-like optical emissions, electron acceleration to keV energies, and similar magnetic geometries. There are observational differences though, and theoreticall ...
... been stimulated by the observational analogies one can draw between the phenomena (e.g., Obayashi, 1975). The analogous elements include ribbon-like optical emissions, electron acceleration to keV energies, and similar magnetic geometries. There are observational differences though, and theoreticall ...
AST1001.ch10
... neutrino predicts that they have mass and can change form. This theory agrees with the observed neutrino numbers. ...
... neutrino predicts that they have mass and can change form. This theory agrees with the observed neutrino numbers. ...
Factors affecting the performance of triangular pyramid solar still
... concluded that the convective and evaporative heat transfer coefficients are important for designing solar distillation systems and the effect of temperature difference between the evaporative and condensing surfaces is also important to optimize the operating temperature range. The condensing area ...
... concluded that the convective and evaporative heat transfer coefficients are important for designing solar distillation systems and the effect of temperature difference between the evaporative and condensing surfaces is also important to optimize the operating temperature range. The condensing area ...
Document
... The sunspot cycle over the past 400 years. Note the period before 1700, when, for reasons that are not understood, very few sunspots were observed. Sunspots have reached a maximum about every 11 years since 1700, and there is also a suggestion of some sort of cycle on a 55- to 57-year time scale. B ...
... The sunspot cycle over the past 400 years. Note the period before 1700, when, for reasons that are not understood, very few sunspots were observed. Sunspots have reached a maximum about every 11 years since 1700, and there is also a suggestion of some sort of cycle on a 55- to 57-year time scale. B ...
The Sun
... The sunspot cycle over the past 400 years. Note the period before 1700, when, for reasons that are not understood, very few sunspots were observed. Sunspots have reached a maximum about every 11 years since 1700, and there is also a suggestion of some sort of cycle on a 55- to 57-year time scale. B ...
... The sunspot cycle over the past 400 years. Note the period before 1700, when, for reasons that are not understood, very few sunspots were observed. Sunspots have reached a maximum about every 11 years since 1700, and there is also a suggestion of some sort of cycle on a 55- to 57-year time scale. B ...
Corona
A corona (Latin, 'crown') is an aura of plasma that surrounds the sun and other celestial bodies. The Sun's corona extends millions of kilometres into space and is most easily seen during a total solar eclipse, but it is also observable with a coronagraph. The word ""corona"" is a Latin word meaning ""crown"", from the Ancient Greek κορώνη (korōnē, “garland, wreath”).The high temperature of the Sun's corona gives it unusual spectral features, which led some in the 19th century to suggest that it contained a previously unknown element, ""coronium"". Instead, these spectral features have since been explained by highly ionized iron (Fe-XIV). Bengt Edlén, following the work of Grotrian (1939), first identified the coronal lines in 1940 (observed since 1869) as transitions from low-lying metastable levels of the ground configuration of highly ionised metals (the green Fe-XIV line at 5303 Å, but also the red line Fe-X at 6374 Å). These high stages of ionisation indicate a plasma temperature in excess of 1,000,000 kelvin, much hotter than the surface of the sun.Light from the corona comes from three primary sources, which are called by different names although all of them share the same volume of space. The K-corona (K for kontinuierlich, ""continuous"" in German) is created by sunlight scattering off free electrons; Doppler broadening of the reflected photospheric absorption lines completely obscures them, giving the spectral appearance of a continuum with no absorption lines. The F-corona (F for Fraunhofer) is created by sunlight bouncing off dust particles, and is observable because its light contains the Fraunhofer absorption lines that are seen in raw sunlight; the F-corona extends to very high elongation angles from the Sun, where it is called the zodiacal light. The E-corona (E for emission) is due to spectral emission lines produced by ions that are present in the coronal plasma; it may be observed in broad or forbidden or hot spectral emission lines and is the main source of information about the corona's composition.