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Stars Evening Classes Week Three The Sun and Stars Presented by Oisín Creaner
Corona Convective Zone Radiative Zone Photosphere Core Interior of the Sun
Causes of sunspots
Emission & Absorption Spectra
Binary Stars - the Doppler Effect!
Spectral Class of some well known stars
MASS-LUMINOSITY RELATIONSHIP L = M 35 01 35 = 01 x 01 x 01 x 01 = 1/3,000 th 2 35 = 2 x 2 x 2 x 2 = 11 5 = 100 x 100 x 100 x 100 = 10 million.
Stars Evening Classes Week Three Presented by Oisín Creaner
Hydrostatic Equilibrium The collapsing nebula’s core is squeezed by gravity
Hydrostatic Equilibrium It reaches 10 million degrees.
P P P Extent of electro- magnetic force (repulsive) Extent of strong nuclear force (attractive)
Hydrostatic Equilibrium Balance between gravitation & thermal expansion
Core Helium Enrichment
Helium Core Hydrogen fusing shell
Helium Core Hydrogen fusing shell
Helium Core Hydrogen Envelope
A Star’s Life - Death After the main sequence
The Sun in 5 billion years
Thank You Useful websites
Objectives Explore the structure of the Sun. The Sun Describe the solar activity cycle and how the Sun affects Earth. Compare the different types of spectra.
Notes 30.2 Stellar Evolution Std 2d: Know stars differ in their life cycles and that may be used to collect data that reveal those differences Std 2f:
Twinkle, Twinkle, Little Star.... How I Wonder What You Are... Stars have Different colors –Which indicate different temperatures Red stars- cooler White/blue.
Evolution of Stars. Main Factor of Life Cycle Beginning mass.
Stars 2 Star Field as seen through the Hubble Space Telescope.
Protostars are difficult to observe because A. the protostar stage is very short. B. they are surrounded by cocoons of gas and dust. C. they radiate mainly.
Stellar Evolution (of sun- like stars) How do stars age & die?
THE HR DIAGRAM The Life Cycles of Stars. HR-D IAGRAM - W HAT IS IT ? Stands for the Hertzsprung-Russell Diagram Graphs surface temperature (color) vs.
Everything you always wanted to know about stars… Material from Chapters 8 and 9 in Horizons by Seeds 0.
Stars Dr Katy Lancaster. Overview Introduction to stars –What they are –What we can measure The Hertzsprung-Russell Diagram Star life cycles –Evolution.
The Life Cycles of Stars Dr. Jim Lochner, NASA/GSFC.
PHOTOSPHERE The lowest layer of the Suns atmosphere that is also the visible part we see.
CHAPTER 10: CHAPTER 10: The Sun – Our Favorite (and Ordinary) Star.
Life cycle of stars Nebulae to supernova. Stars and radiation Stars are huge nuclear reactors that give off different forms of radiation (see below) all.
Stellar Evolution What is the fate of the sun and other stars??
© 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their.
Stellar Evolution II. The Upper End of the Main Sequence: How massive can a star get? Larger clouds of gas (GMCs) tend to fragment into smaller ones before.
Exploring the Universe Chapter Energy From the Sun.
Chapter 2 Stars and Galaxies. Where are you? The Earth circles the sun The sun is one of billions of billions of stars. To measure distances between stars.
The Sun What is the fate of our sun and other stars?
The Birth and Death of Stars On-line Lesson. On-line Lessons: The Birth and Death of Stars What are Stars? Stars are large balls of hot gas. They look.
Quiz on star life cycle. Using the quiz … Click through the quiz to see the questions and answers. Remember it is MUCH better to try to think of the answer,
Stellar Structure Section 6: Introduction to Stellar Evolution Lecture 18 – Mass-radius relation for black dwarfs Chandrasekhar limiting mass Comparison.
LECTURE 18, NOVEMBER 2, 2010 ASTR 101, SECTION 2 INSTRUCTOR, JACK BRANDT 1ASTR 101-3, FALL 2010.
Our Place in the Cosmos Lecture 11 Understanding Stars - the H-R Diagram.
Light year is: Distance that light travels in a vacuum in one year, about 9.5 trillion km - which is used to record distances between stars and galaxies.
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Table of Contents Section 1 Stars Section 2 The Life Cycle of Stars.
Unit 1 The Universe Mrs. Williams 8th Grade Big Idea: The sun is one of billions of stars in one of billions of galaxies in the universe.
Spring 2012 Astronomy Course Mississippi Valley Night Sky Conservation The Sky Around Us Program developed by Mississippi Valley Conservation Authority.
The Sun. How Old Is Our Sun? Stars like the Sun shine for nine to ten billion years The Sun is about 4.5 billion years old, judging by the age of moon.
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