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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 = 1131 100 35 = 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 www.astronomy.ie/handouts www.stellarium.org Useful websites
Stars Star field taken with Hubble Space Telescope.
Chapters 14 and 15 Stellar Evolution and Stellar Remnants.
Stellar Evolution. Structure Mass governs a star’s temperature, luminosity, and diameter Hydrostatic Equilibrium – the balance between gravity squeezing.
The Life Cycle of Stars.
Off the Main Sequence - The Evolution of a Sun-like Star Stages
Energy Production in the Sun Physics 113 Goderya Chapter(s): 8 Learning Outcomes:
Life Cycle of Stars Birth Place of Stars:
DAY 16 September 17, Agenda 1 st RP ‘Stuff’ back Grade Sheets Complete Star Notes Star Concept Map.
The Lives of Stars. Topics that will be on the test!! Apparent and Absolute Magnitude HR Diagram Stellar Formation and Lifetime Binary Stars Stellar Evolution.
Life Cycle of Stars. Star Birth Develops from nebula –Nebula is a collection of dust and gas Gravity overcomes pressure Gravitational contraction.
LIFE OF A STAR BY: STACIA DEUTSCH AND RHODY COHON.
Review for Quiz 2. Outline of Part 2 Properties of Stars Distances, luminosities, spectral types, temperatures, sizes Binary stars, methods of estimating.
THE LIFE CYCLE OF A STAR Objective: I will compare and contrast the life cycle of stars based on their mass.
The Evolution of Stars - stars evolve in stages over billions of years 1.Nebula -interstellar clouds of gas and dust undergo gravitational collapse and.
Stars By: Mary Aragon Theory of Relativity. What are stars? Enormous balls of gas Made mostly of hydrogen and helium Constant nuclear process (fusion)
STARS & their life cycles Like us, stars are born, grow older, become middle aged and eventually die!!! Unlike us, stars take billions of years to complete.
$1 Million $500,000 $250,000 $125,000 $64,000 $32,000 $16,000 $8,000 $4,000 $2,000 $1,000 $500 $300 $200 $100 Welcome.
Stellar Evolution – Life of a Star Stellar evolution is the process in which the forces of pressure (gravity) alter the star. Stellar evolution is inevitable;
Astronomy The Study of Planets, Stars, Galaxies, and More.
Star Structure Diagram (Draw this) Star Structure The sun, like all stars, is made up of hydrogen and helium gases, and a handful of other elements depending.
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