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Chapter 08
Chapter 08

... Four 1H (protons) have slightly more mass than ...
Solar system
Solar system

... Saturn Saturn is sixth planet from the sun. It is a gas giant almost as big as Jupiter with an equatorial diameter of diameter of about 120,500 kilometers. Saturn is thought to consist of a small core of rock. In Saturn there are four moon they are called enceladus Tethys dione mimas. ...
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Little Explorers of Big Space

... We are a class of 4 year old Little Explorers and we want to explore and discover Space. We become familiar with Space by looking at Space books, watch videos, use the internet and see PowerPoint presentations. ...
The Scale of Interplanetary Space
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... In this exercise, your group will use the board on one side of the room to illustrate the span of time by creation of an enormous winding "timeline". 1. First of all, draw your line. Start with the present day at the bottom right of the chalkboard, and draw a line along the bottom all the way to the ...
Astrophysics and Chemistry Review Guide
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... What happened in Air Force One with President Regan and how does it relate to the sun? Why doesn’t all of sun’s electromagnetic energy hit the surface of the Earth? What stops harmful UV rays? Why? ...
Chapter 27 Stars and Galaxies
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... star’s apparent magnitude and how far away the star is. ► The brightness depends on both a star’s luminosity and distance from Earth. ...
Homework #4 Solutions ASTR100: Introduction to Astronomy
Homework #4 Solutions ASTR100: Introduction to Astronomy

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... Friday 20th March 2015 Solar and Lunar Eclipses WALT: To explain how eclipses happen To describe the different types of solar eclipse To look at ancient explanations of eclipses ...
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The Sun - Sheldon ISD

... How much do you know about this giant ball of energy in the sky? The sun is really a star. It is the closest one to earth. It is about 93 million miles away. The sun is the center of our solar system. All the planets revolve around it. Although it has a diameter of about 1.3 million kilometers, the ...
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Lecture 4 January 31 - Center for Astrophysics and Space

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Stellar Evolution

... It glows with infrared light generated from its gravitational contraction like Jupiter does. They don’t “evolve” but stay brown dwarfs and slowly fade over 100s of billions of years ...
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Hot-plate model of stars March 14 − Observed properties of stars

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... Why don’t all of the pieces just pull themselves together into an infinitesimally small clump at the center? ...
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... It glows with infrared light generated from its gravitational contraction like Jupiter does. They don’t “evolve” but stay brown dwarfs and slowly fade over 100s of billions of years ...
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Heliocentric Model –The sun is the center of the solar system

Chpt12a
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... now our Sun begins to die. As the hydrogen and helium continue to burn in the outer shell the outer envelope becomes unstable and is ejected into space. The remaining hot core ionizes the ejected atmosphere and we now have a planetary nebula. ...
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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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