Theoretical Predictions for Mass Loss Rates: Rotation & Pulsation
... The coronal heating problem • We still don’t understand the physical processes responsible for heating up the coronal plasma. ...
... The coronal heating problem • We still don’t understand the physical processes responsible for heating up the coronal plasma. ...
the next decade - Lowell Observatory
... Research on the astrophysics of activity and variability of Sun-like stars covers an extensive literature. Recent work on the so-called “solar-stellar connection,” the solar irradiance data and terrestrial climate reconstructions, and the effect of solar variations on terrestrial climate have divers ...
... Research on the astrophysics of activity and variability of Sun-like stars covers an extensive literature. Recent work on the so-called “solar-stellar connection,” the solar irradiance data and terrestrial climate reconstructions, and the effect of solar variations on terrestrial climate have divers ...
Legends Night Sky Orion
... The constellation system that we have today came from the ancient Greeks. The stories, legends and reasons why they came to be in the sky originated the very first moment that man walked this Earth. - The constellations were totally imaginary creatures, beings, and objects that farmers, poets, and a ...
... The constellation system that we have today came from the ancient Greeks. The stories, legends and reasons why they came to be in the sky originated the very first moment that man walked this Earth. - The constellations were totally imaginary creatures, beings, and objects that farmers, poets, and a ...
The Milky Way thin disk structure as revealed by stars and young
... when seen face-off, possess dusty and gaseous disks where stars are barely visible. On the other hand, when seen face-on, they exhibit quite spectacular structures in the form of gaseous and stellar spiral arms, bridges, inter-arm structures, knots, bifurcations, and so forth. These detailed shapes a ...
... when seen face-off, possess dusty and gaseous disks where stars are barely visible. On the other hand, when seen face-on, they exhibit quite spectacular structures in the form of gaseous and stellar spiral arms, bridges, inter-arm structures, knots, bifurcations, and so forth. These detailed shapes a ...
The first carbon-enhanced metal-poor star found in the Sculptor
... In addition, there have been surveys of Carbon-stars and CHstars in Sculptor (e.g., Azzopardi et al. 1986), some of which that have been followed up with IR spectra (e.g., Groenewegen et al. 2009). The carbon-enhancement of these stars is believed to come from internal processes or mass transfer, an ...
... In addition, there have been surveys of Carbon-stars and CHstars in Sculptor (e.g., Azzopardi et al. 1986), some of which that have been followed up with IR spectra (e.g., Groenewegen et al. 2009). The carbon-enhancement of these stars is believed to come from internal processes or mass transfer, an ...
Isotopic composition of Hg and Pt in 5 slowly rotating HgMn stars *
... slowly rotating HgMn stars. This work represents an improvement over previous studies due to the availability of very high spectral resolution (R = 118 000) and to the new information on wavelengths and atomic structure of Hg II and Pt II. Each of the observed stars has Hg overabundant by more than ...
... slowly rotating HgMn stars. This work represents an improvement over previous studies due to the availability of very high spectral resolution (R = 118 000) and to the new information on wavelengths and atomic structure of Hg II and Pt II. Each of the observed stars has Hg overabundant by more than ...
The Age Distribution of Potential Intelligent Life in the Milky Way
... From this equation we can see that the gas mass lost as it is turned into stars (per parsec squared per year) is proportional to the total mass of gas (per parsec squared) to the power n. Observations of distant galaxies have found this relationship to hold consistently, just with varying values of ...
... From this equation we can see that the gas mass lost as it is turned into stars (per parsec squared per year) is proportional to the total mass of gas (per parsec squared) to the power n. Observations of distant galaxies have found this relationship to hold consistently, just with varying values of ...
Comets, the Kuiper Belt and the Oort Cloud
... have now been observed on the order of 2000 bodies orbiting the sun. In reality these should be simply referred to as trans-Neptunian objects (TNOs) because there is no good reason to suppose that our solar system abruptly stops at the orbit of Pluto. The first KBO, 1992 QB1, was detected in 1992. O ...
... have now been observed on the order of 2000 bodies orbiting the sun. In reality these should be simply referred to as trans-Neptunian objects (TNOs) because there is no good reason to suppose that our solar system abruptly stops at the orbit of Pluto. The first KBO, 1992 QB1, was detected in 1992. O ...
- Mastering Physics Answers
... Recall that Newton’s version of Kepler’s third law allows us to calculate the mass of any object if we know the orbital period and distance of a much smaller object that orbits it. This means we can use not only Earth’s period and distance to calculate the Sun’s mass but the period and distance of a ...
... Recall that Newton’s version of Kepler’s third law allows us to calculate the mass of any object if we know the orbital period and distance of a much smaller object that orbits it. This means we can use not only Earth’s period and distance to calculate the Sun’s mass but the period and distance of a ...
Candidate star clusters toward the inner Milky Way discovered on
... Fig. 3. Three-color 3 × 3 arcmin finding charts (Y – blue, J – green, KS – red) of the candidate clusters. North is at the top left and east is to the top right. ...
... Fig. 3. Three-color 3 × 3 arcmin finding charts (Y – blue, J – green, KS – red) of the candidate clusters. North is at the top left and east is to the top right. ...
presentation (PPT format)
... their mutual gravitational attraction-for distant galaxies the Hubble speed is much greater than any intrinsic motions that the galaxies might have • The value of H0? Depends on the determination of the distance (vary depending on the technique between 40100km/s/Mpc) • Because the value of H0 is som ...
... their mutual gravitational attraction-for distant galaxies the Hubble speed is much greater than any intrinsic motions that the galaxies might have • The value of H0? Depends on the determination of the distance (vary depending on the technique between 40100km/s/Mpc) • Because the value of H0 is som ...
Michell, Laplace and the Origin of the Black Hole Concept
... (Jungnickel and McCormmach, 1996: 249; their italics). Cavendish showed the paper to Maskelyne, Herschel, and other members of the Royal Society, and he read the paper—in three instalments—at the 11 and 18 December 1783 and 15 January 1784 meetings of the Society. This was a time when the Society wa ...
... (Jungnickel and McCormmach, 1996: 249; their italics). Cavendish showed the paper to Maskelyne, Herschel, and other members of the Royal Society, and he read the paper—in three instalments—at the 11 and 18 December 1783 and 15 January 1784 meetings of the Society. This was a time when the Society wa ...
25 Years of the Hubble Space Telescope - Speaker
... This is the first of a sequence of three images to be shown relatively rapidly. We begin the anniversary year by revisiting a legendary image: the “Pillars of Creation” in the Eagle Nebula. This image was the first Hubble image to fascinate the public, and still remains one of Hubble’s most popular ...
... This is the first of a sequence of three images to be shown relatively rapidly. We begin the anniversary year by revisiting a legendary image: the “Pillars of Creation” in the Eagle Nebula. This image was the first Hubble image to fascinate the public, and still remains one of Hubble’s most popular ...
The Kuiper Belt and Other Debris Disks - UCLA
... dominated by hydrogen and helium. Throughout the bulk of each planet these gases are compressed, however, into a degenerate (metallic) liquid that supports convection and sustains a magnetic field through dynamo action. The compositional similarity to the Sun suggests to some investigators that the ...
... dominated by hydrogen and helium. Throughout the bulk of each planet these gases are compressed, however, into a degenerate (metallic) liquid that supports convection and sustains a magnetic field through dynamo action. The compositional similarity to the Sun suggests to some investigators that the ...
The Occurrence and Architecture of Exoplanetary Systems
... Solar System. Isaac Newton realized that the Solar System is more orderly than required by the laws of motion and took this as evidence for God’s hand in creation. Pierre-Simon Laplace was inspired by the same facts to devise a mechanistic theory for the formation of the Solar System. Since then, it ...
... Solar System. Isaac Newton realized that the Solar System is more orderly than required by the laws of motion and took this as evidence for God’s hand in creation. Pierre-Simon Laplace was inspired by the same facts to devise a mechanistic theory for the formation of the Solar System. Since then, it ...
Lecture notes 18: Galaxies and galaxy clusters
... Lecture notes 18: Galaxies and galaxy clusters Immanuel Kant (1724–1824) and Thomas Wright (1711–1786) were among the first to recocnize the possibility that the Milky Way was indeed a stellar disk where the Sun was but one of many. Kant went on to propose that if the Milky Way were limited then perh ...
... Lecture notes 18: Galaxies and galaxy clusters Immanuel Kant (1724–1824) and Thomas Wright (1711–1786) were among the first to recocnize the possibility that the Milky Way was indeed a stellar disk where the Sun was but one of many. Kant went on to propose that if the Milky Way were limited then perh ...
Stars, Galaxies, and Beyond
... manageable look at astronomy and astrophysics applying to space well beyond the solar system. It is likely that humankind will not reach other stars or galaxies in the foreseeable future, but our understanding of our place in the universe is remarkably enriched by pursuing this knowledge. I thank pr ...
... manageable look at astronomy and astrophysics applying to space well beyond the solar system. It is likely that humankind will not reach other stars or galaxies in the foreseeable future, but our understanding of our place in the universe is remarkably enriched by pursuing this knowledge. I thank pr ...
The Nature of Esoteric Astrology
... For, as well you know, the zodiac is naught but the imaginary path of the sun through the heavens, and this as it appears from the standpoint of our totally insignificant planet. The sun is not, as stated, in any sign of the zodiac. It simply appears to be so as it passes between our little sphere, ...
... For, as well you know, the zodiac is naught but the imaginary path of the sun through the heavens, and this as it appears from the standpoint of our totally insignificant planet. The sun is not, as stated, in any sign of the zodiac. It simply appears to be so as it passes between our little sphere, ...
Properties of Wolf-Rayet Stars - Paul Crowther, University of Sheffield
... ratios (Smith 1968). To date, high-ionization WN2 to WN5 are known as ‘early WN’ (WNE) stars, and low-ionization WN7 to WN9(–11) stars known as ‘late WN’ (WNL) stars, and WN6 stars either early or late-type. Complications arise for WN stars with intrinsically weak emission lines. For example, HD 931 ...
... ratios (Smith 1968). To date, high-ionization WN2 to WN5 are known as ‘early WN’ (WNE) stars, and low-ionization WN7 to WN9(–11) stars known as ‘late WN’ (WNL) stars, and WN6 stars either early or late-type. Complications arise for WN stars with intrinsically weak emission lines. For example, HD 931 ...
Magnetic cycles of Sun-like stars with different levels of coronal and
... Hertzsprung-Russell diagram (see Baliunas et al. 1995; Radick et al. 1998; Lockwood et al. 2007). For the HK-project, stars were carefully chosen according to those physical parameters, which are most close to the Sun: cold, single stars – dwarfs, belonging to the main sequence. Close binary systems ...
... Hertzsprung-Russell diagram (see Baliunas et al. 1995; Radick et al. 1998; Lockwood et al. 2007). For the HK-project, stars were carefully chosen according to those physical parameters, which are most close to the Sun: cold, single stars – dwarfs, belonging to the main sequence. Close binary systems ...
Is $^ 6$ Li in metal-poor halo stars produced in situ by solar
... We also assume that the rate of proton acceleration in stellar flares does not depend on metallicity, but only on surface magnetic flux. In solar flares, the particle acceleration processes at work in impulsive events are related to excitation of plasma waves that are essentially independent of the ...
... We also assume that the rate of proton acceleration in stellar flares does not depend on metallicity, but only on surface magnetic flux. In solar flares, the particle acceleration processes at work in impulsive events are related to excitation of plasma waves that are essentially independent of the ...
Fast Auto-Focus Method and Software for CCD-based
... far from Best Focus (user selected inside or outside of Best Focus) 2. A full frame 3x3 binned image is taken with a minimal exposure time 3. The brightest star is found, the position determined and the HFD measured 4. The target star is sub-framed and a second exposure taken (download time is minim ...
... far from Best Focus (user selected inside or outside of Best Focus) 2. A full frame 3x3 binned image is taken with a minimal exposure time 3. The brightest star is found, the position determined and the HFD measured 4. The target star is sub-framed and a second exposure taken (download time is minim ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.