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Evolution of Stars
Main Factor of Life Cycle Beginning mass
Nebulae Huge clouds of dust and gas
Protostar Hot, contracting cloud of dust and gases
When the temp. reaches 10,000,000 °C, a star is born
Medium-sized Stars Most common star type Our sun
Red Giant Most of the hydrogen is used up Outer shell begins to expand
As it expands, it cools and becomes red
Core gets hotter – up to 200,000,000 °C – where helium is fused into carbon
Gas drifts off forming a planetary nebula
White Dwarf Extremely dense White hot
Massive Stars Start like medium- sized stars Become supergiants after red giant stage
Temp can reach 600,000,000 °C Carbon atoms fuse and eventually form iron
Supernova Tremendous explosion Heat can reach 1,000,000,000 °C
Iron atoms fuse to form heavier elements Can light up our sky
Neutron Stars Often less than 16 km in diameter Spin very rapidly
Energy is given off in narrow beams Pulsars – appear to give off pulses of energy
Black Holes Incredibly massive stars Gravity becomes so strong that even light cannot escape
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:
Stellar Evolution What is the fate of the sun and other stars??
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.
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.
Life Cycle of a Star. Stage 1 Protostars Protostars Huge clouds of gas (hydrogen) in which stars are made. Many thousands of times bigger than our.
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.
Twinkle, Twinkle, Little Star.... How I Wonder What You Are... Stars have Different colors –Which indicate different temperatures Red stars- cooler White/blue.
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.
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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,
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.
THE LIFE CYCLE OF STARS Chapter 15-2 Part 3. The Aging of Massive Stars Massive stars use their hydrogen much faster than stars like the sun do. Since.
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LECTURE 18, NOVEMBER 2, 2010 ASTR 101, SECTION 2 INSTRUCTOR, JACK BRANDT 1ASTR 101-3, FALL 2010.
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Table of Contents Section 1 Stars Section 2 The Life Cycle of Stars.
Supernovas – or things that go “bang” in the night! The next-to-last chapter in the lives of large stars.
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.
The Rest of the Universe Stars and Galaxies. Stars constellations- an imaginary picture made by groups of stars; example: The Big Dipper The color of.
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Stars Dr Katy Lancaster. Overview Introduction to stars –What they are –What we can measure The Hertzsprung-Russell Diagram Star life cycles –Evolution.
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.
Everything you always wanted to know about stars… Material from Chapters 8 and 9 in Horizons by Seeds 0.
Big Bang to Earth's Formation Concept Map By Hari Vellaipandian.
Chapter 24 Stars, Galaxies & the Universe. Distance units To talk about space we need to come up with distance units a little more appropriate than just.
Stellar Evolution Stellar Evolution Or How and Where do stars come from?
Is There Life in Space?. How do scientists study the solar system? Telescopes Telescopes Radiowaves Radiowaves Infrared Infrared Visible Visible X-rays.
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.
Questions 6-9 By. Nick D.. Evolution of a star Stars go from dust and gas to a Protostar to either a giant star or a Supergiant star. Then the supergiant.
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