8origin4s
... material, acquire large gas envelopes 3 Edge of solar system -- leftover and ejected icy planetesimals form Kuiper belt and Oort cloud ...
... material, acquire large gas envelopes 3 Edge of solar system -- leftover and ejected icy planetesimals form Kuiper belt and Oort cloud ...
Astronomy II (ASTR-1020) — Homework 1
... 2. Which of the following is not part of the scientific method? a) A hypothesis is made, which is an educated guess as to how something works. b) The hypothesis is debated by scientists, and if debated successfully, becomes a theory. c) The hypothesis is tested through repeated experimentation and/o ...
... 2. Which of the following is not part of the scientific method? a) A hypothesis is made, which is an educated guess as to how something works. b) The hypothesis is debated by scientists, and if debated successfully, becomes a theory. c) The hypothesis is tested through repeated experimentation and/o ...
doc
... of B to BR is determined by the ratio of the disk rotation velocity r to the wind speed vwind since the magnetic field is frozen into both wind and disk. We assume that vwind is independent of position. The following analysis could be adapted to more complicated configurations. Suppose that a sud ...
... of B to BR is determined by the ratio of the disk rotation velocity r to the wind speed vwind since the magnetic field is frozen into both wind and disk. We assume that vwind is independent of position. The following analysis could be adapted to more complicated configurations. Suppose that a sud ...
8. The Sun as a Star
... magnetic field lines. Some may persist for months; others break up in hours, ejecting mass into space. ...
... magnetic field lines. Some may persist for months; others break up in hours, ejecting mass into space. ...
www.NewYorkScienceTeacher.org/review
... scientists determine the speed of a star’s motion. Motion between the source of light and the observer cause the spectral lines to shift in wavelength. Depending on whether the wavelength is shorter or longer, the observer can determine if the star is moving toward or away from Earth. These shifts a ...
... scientists determine the speed of a star’s motion. Motion between the source of light and the observer cause the spectral lines to shift in wavelength. Depending on whether the wavelength is shorter or longer, the observer can determine if the star is moving toward or away from Earth. These shifts a ...
Recognition of Climate Variability within South Florida
... With the recent advent of high altitude space observatories and highly sophisticated measuring devices, the importance of phenomena such as coronal mass ejections, solar wind and cosmic rays on the terrestrial environment are now just beginning to be understood. Besides emitting a continuous stream ...
... With the recent advent of high altitude space observatories and highly sophisticated measuring devices, the importance of phenomena such as coronal mass ejections, solar wind and cosmic rays on the terrestrial environment are now just beginning to be understood. Besides emitting a continuous stream ...
Guide to the Sun Poster PDF
... a lighter region known as the penumbra. Sunspots are on average about the same size as the Earth. Sunspots, Solar Flares and Coronal Mass Ejections can directly influence events on Earth. They occur near sunspots, usually at the dividing line between areas of oppositely directed magnetic fields. Hot ...
... a lighter region known as the penumbra. Sunspots are on average about the same size as the Earth. Sunspots, Solar Flares and Coronal Mass Ejections can directly influence events on Earth. They occur near sunspots, usually at the dividing line between areas of oppositely directed magnetic fields. Hot ...
Stellar variability and microvariability II. Spot maps and modelling
... • Magnetic field generation and modulation in stellar interiors (is aW-dynamo working at the base of the convection zone or in the overshoot layer ?) • Processes that drive the magnetic field to the surface (flux-tube instabilities ?); • Interaction between magnetic fields and plasma in the outer la ...
... • Magnetic field generation and modulation in stellar interiors (is aW-dynamo working at the base of the convection zone or in the overshoot layer ?) • Processes that drive the magnetic field to the surface (flux-tube instabilities ?); • Interaction between magnetic fields and plasma in the outer la ...
Review Game
... they would generate so much power that they would blow themselves apart. Its core contracts, but its outer layers expand and the star becomes bigger and brighter. the expanding shell of gas that is no longer gravitationally held to the remnant of a lowmass star protostar, main-sequence, red giant, w ...
... they would generate so much power that they would blow themselves apart. Its core contracts, but its outer layers expand and the star becomes bigger and brighter. the expanding shell of gas that is no longer gravitationally held to the remnant of a lowmass star protostar, main-sequence, red giant, w ...
Characteristics of the Sun
... However, compared with other stars, the Sun is rather ordinary. It is about in the middle of the ranges for star size and brightness. Many of the stars that you can see in the night sky are actually bigger and brighter than the Sun—they only appear smaller because they are much farther away. Howeve ...
... However, compared with other stars, the Sun is rather ordinary. It is about in the middle of the ranges for star size and brightness. Many of the stars that you can see in the night sky are actually bigger and brighter than the Sun—they only appear smaller because they are much farther away. Howeve ...
Search for magnetic fields at the surface of Mira stars
... The Stokes V signature is associated to the blue component of the I profile, i.e., to the material which is driven outward by the shock ...
... The Stokes V signature is associated to the blue component of the I profile, i.e., to the material which is driven outward by the shock ...
AST121 Introduction to Astronomy
... activity has increased significantly. The Sun attains its expected sunspot maximum in the year 2000. These images are captured using Fe IX-X 171 Å emission showing the solar corona at a temperature of about 1.3 million K. Many more sunspots, solar flares, and coronal mass ejections occur during the ...
... activity has increased significantly. The Sun attains its expected sunspot maximum in the year 2000. These images are captured using Fe IX-X 171 Å emission showing the solar corona at a temperature of about 1.3 million K. Many more sunspots, solar flares, and coronal mass ejections occur during the ...
Parallax - High Point University
... activity has increased significantly. The Sun attains its expected sunspot maximum in the year 2000. These images are captured using Fe IX-X 171 Å emission showing the solar corona at a temperature of about 1.3 million K. Many more sunspots, solar flares, and coronal mass ejections occur during the ...
... activity has increased significantly. The Sun attains its expected sunspot maximum in the year 2000. These images are captured using Fe IX-X 171 Å emission showing the solar corona at a temperature of about 1.3 million K. Many more sunspots, solar flares, and coronal mass ejections occur during the ...
Lecture 3 - The University Centre in Svalbard
... The conditions in the solar core are extreme and this area is kind of like a nuclear power plant. The temperature is over 15 million degrees C, and the enormous pressure is pushing the atoms very close together causing them to collide with each other all the time. Sometimes hydrogen nucleus combines ...
... The conditions in the solar core are extreme and this area is kind of like a nuclear power plant. The temperature is over 15 million degrees C, and the enormous pressure is pushing the atoms very close together causing them to collide with each other all the time. Sometimes hydrogen nucleus combines ...
New findings show magnetic organization of the Sun
... eruptions ever seen in space. The radiant star has enough raw power to blow off two expanding shells of gas equal to the mass of several of our suns. The largest shell is so big—four light years across—that it would stretch nearly all the way from our Sun to the next nearest star, Alpha Centauri. Th ...
... eruptions ever seen in space. The radiant star has enough raw power to blow off two expanding shells of gas equal to the mass of several of our suns. The largest shell is so big—four light years across—that it would stretch nearly all the way from our Sun to the next nearest star, Alpha Centauri. Th ...
observatory - Science Presenters Central
... Features of the ACTIVE Sun: The Sun’s atmosphere is periodically changed by its magnetic fields, and the most common features of these changes are sunspots. These are areas of the photosphere that appear dark because they are cooler than the rest of the Sun’s lower atmosphere. Most of the time, the ...
... Features of the ACTIVE Sun: The Sun’s atmosphere is periodically changed by its magnetic fields, and the most common features of these changes are sunspots. These are areas of the photosphere that appear dark because they are cooler than the rest of the Sun’s lower atmosphere. Most of the time, the ...
Problem Set 6 for Astro 320 Read sections 11.2
... Due Nov. 18, by 5 pm, to the Astro 320 drop box. Problem 1: a) C & O, problem 11.2a. The Sun’s luminosity is 3.8 × 1026 W, or J/s. That translates, via E = mc2 , to m = E/c2 = 3.8 × 1026 /(3 × 108 )2 = 4 × 109 kg/s. Per year, that’s 3.16 × 107 ∗ 4 × 109 = 1.26 × 1017 kg/year, or 6.3 × 10−14 M /year ...
... Due Nov. 18, by 5 pm, to the Astro 320 drop box. Problem 1: a) C & O, problem 11.2a. The Sun’s luminosity is 3.8 × 1026 W, or J/s. That translates, via E = mc2 , to m = E/c2 = 3.8 × 1026 /(3 × 108 )2 = 4 × 109 kg/s. Per year, that’s 3.16 × 107 ∗ 4 × 109 = 1.26 × 1017 kg/year, or 6.3 × 10−14 M /year ...
24.3 The Sun - Planet Earth
... of the solar atmosphere, the corona (corona ⫽ crown) is very weak and, as with the chromosphere, is visible only when the brilliant photosphere is covered. This envelope of ionized gases normally extends a million kilometers from the sun and produces a glow about half as bright as the full moon. At ...
... of the solar atmosphere, the corona (corona ⫽ crown) is very weak and, as with the chromosphere, is visible only when the brilliant photosphere is covered. This envelope of ionized gases normally extends a million kilometers from the sun and produces a glow about half as bright as the full moon. At ...
Contents
... —The Deep Insight Pursued by Ray Davis The “missing solar neutrinos” problem was real Contributions from Canadian and Japanese scientists Efficiency of the proton-proton chain reactions ...
... —The Deep Insight Pursued by Ray Davis The “missing solar neutrinos” problem was real Contributions from Canadian and Japanese scientists Efficiency of the proton-proton chain reactions ...
Goal: To understand how the sun works
... • This is a stable region, kind of like the Stratosphere on the earth. • Starts 200k km below the photosphere, and ends 200k km above the center of the sun. That is 50% of the radius of the sun! • Energy is transferred by radiation. • Temperature ranges from 2 to 7 million degrees Kelvin! ...
... • This is a stable region, kind of like the Stratosphere on the earth. • Starts 200k km below the photosphere, and ends 200k km above the center of the sun. That is 50% of the radius of the sun! • Energy is transferred by radiation. • Temperature ranges from 2 to 7 million degrees Kelvin! ...
Quiz 2 review sheet - Rice Space Institute
... 14. Stars a bit heavier than the Sun do a similar thing but become a red supergiant. The hot white dwarf is left behind. If material then falls onto it, it can burn the hydrogen quickly as a nova. The expanding envelope of material eventually is called a planetary nebula. 15. Stars a lot heavier th ...
... 14. Stars a bit heavier than the Sun do a similar thing but become a red supergiant. The hot white dwarf is left behind. If material then falls onto it, it can burn the hydrogen quickly as a nova. The expanding envelope of material eventually is called a planetary nebula. 15. Stars a lot heavier th ...
Measuring Solar Mass Loss and Internal Structure from Monitoring
... fundamental scaling of the solar system the product of the gravitational constant, G, and the solar mass, M, is the principal term and the possibility that both parameters are changing is a well-known question. Recent estimates of the change in G [6, 7] suggest it is of order 10-12 to 10-13 y-1, so ...
... fundamental scaling of the solar system the product of the gravitational constant, G, and the solar mass, M, is the principal term and the possibility that both parameters are changing is a well-known question. Recent estimates of the change in G [6, 7] suggest it is of order 10-12 to 10-13 y-1, so ...
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.