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Stellar Interiors
Stellar Interiors

... strongest near the core and fall off toward the surface ...
THE SUN - Van Buren Public Schools
THE SUN - Van Buren Public Schools

... ultraviolet, radio, and X-ray radiation. • Auroras, the result of solar flares, are bright displays of ever-changing light caused by solar radiation interacting with the upper atmosphere in the region of the poles. ...
Unit 3 : The Sun A. Layers of the Sun 1. Core 2. Radiation zone 3
Unit 3 : The Sun A. Layers of the Sun 1. Core 2. Radiation zone 3

Your Star:  _____________________ d = 1 / p
Your Star: _____________________ d = 1 / p

... * Normally, we compare the brightness to another (distant) star instead of the Sun, since the Sun is obviously much brighter and closer than other stars. We use the Sun here because we want to use solar units throughout. ...
Lifetimes of stars
Lifetimes of stars

The Sun
The Sun

powerpoint version
powerpoint version

... Now have a mass-luminosity diagram for Main Sequence stars. This tells us that the heavier they are, the greater is their energy output rate i.e. Luminosity  (mass  mass  mass  mass) but Total energy available  mass Therefore, low mass stars live longer. ...
neutron star - Adams State University
neutron star - Adams State University

... blow much stellar material into space – a very strong stellar wind. ...
I : Internal structure of main sequence stars
I : Internal structure of main sequence stars

PowerPoint Presentation - ASTR498E High energy
PowerPoint Presentation - ASTR498E High energy

... In order to support weight of rest of star, core has to be hot and dense (high pressure) Core conditions are sufficient to allow nuclear fusion to occur ...
The Sun
The Sun

... Six protons are used in the series of reactions but two are released back. Other products include the He-4 nucleus, 2 neutrinos, 2 high-energy gamma photons and 2 positrons. Each of these products carries some of the energy released from the slight reduction in total mass of the system. 4H-1 → He-4 ...
Life Cycle of Stars: Chapter 21
Life Cycle of Stars: Chapter 21

... • Spend life as a main sequence star • Becomes a red giant as hydrogen is depleted • Expands and collapses to facilitate helium burning – Becomes helium burning star ...
Unit 4 5 vocabulary terms to define: Vocabulary Term Definition
Unit 4 5 vocabulary terms to define: Vocabulary Term Definition

... 3. Draw a map of our solar system. Include: the Sun, the 8 planets, asteroid belt, Oort Cloud and Kuiper belt. ...
Holography
Holography

... Estimate the temperature of the surface of our Sun, given that the Sun emits light whose peak is in the visible spectrum at around 500 nm. ...
Astronomy
Astronomy

... 24. Stars spend most of their lives in this stage: 25. A visual representation of the temperature and luminosity of stars is called: 26. Relatively dark spots on the sun that contains intense magnetic fields are known as: 27. These reactions join the nuclei of atoms to form more massive nuclei: 28. ...
The Sun, the closest star - University of Iowa Astrophysics
The Sun, the closest star - University of Iowa Astrophysics

27 September: Inside the Sun
27 September: Inside the Sun

Lecture notes -
Lecture notes -

... it “burn”, providing its current power or ...
Final 2004
Final 2004

... d 40 billion years (16.) Whi h of the following is an a urate des ription of the behavior of the nu leons in the rea tion p+p ! 2 H + e+ +  ? a one neutron hanges to a proton b one proton hanges to a neutron the nu leons retain their identities d none of the above (17.) Whi h of the following ...
AST 301 Introduction to Astronomy
AST 301 Introduction to Astronomy

... To understand nuclear fusion, we need to know about the interactions between the particles in an atomic nucleus. We already know something about gravity and electrical forces. There are two more forces that matter. The strong, or nuclear, force is an attraction between the particles in a nucleus (pr ...
Unit 49-59 Review
Unit 49-59 Review

... b. Its rapid rotation c. The force exerted by escaping neutrinos d. Gas pressure 4. Which will take longer to escape from the center of the Sun a. Neutrinos b. Photons c. They will escape at approximately the same time 5. 1 gram of mass corresponds to a. 9*1013 joules b. 900 joules c. 9*10-13 joules ...
4 x What Powers the Sun? • Need to provide
4 x What Powers the Sun? • Need to provide

... temperature pressure density composition energy generation energy transport mechanism ...
The Sun…the star in the solar system
The Sun…the star in the solar system

Science Olympiad - UNC Physics and Astronomy
Science Olympiad - UNC Physics and Astronomy

... Protoplanetary Disks ...
What is the sun look like
What is the sun look like

... What is the sun look like ? ...
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Standard solar model

The standard solar model (SSM) is a mathematical treatment of the Sun as a spherical ball of gas (in varying states of ionisation, with the hydrogen in the deep interior being a completely ionised plasma). This model, technically the spherically symmetric quasi-static model of a star, has stellar structure described by several differential equations derived from basic physical principles. The model is constrained by boundary conditions, namely the luminosity, radius, age and composition of the Sun, which are well determined. The age of the Sun cannot be measured directly; one way to estimate it is from the age of the oldest meteorites, and models of the evolution of the Solar System. The composition in the photosphere of the modern-day Sun, by mass, is 74.9% hydrogen and 23.8% helium. All heavier elements, called metals in astronomy, account for less than 2 percent of the mass. The SSM is used to test the validity of stellar evolution theory. In fact, the only way to determine the two free parameters of the stellar evolution model, the helium abundance and the mixing length parameter (used to model convection in the Sun), are to adjust the SSM to ""fit"" the observed Sun.
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