'Helium fusion' diaporamas de présentation

The Lives of Stars

The Lives of Stars. The Deaths of Giants. Last Time. Last time, we traced the evolution of a star, starting with the cloud of gas from which it forms Denser patches of these molecular clouds begin to grow, as their gravity attracts more mass. Last Time. These dense clumps continue to grow

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ASTR100 (Spring 2008) Introduction to Astronomy Life as a Low-mass Star

ASTR100 (Spring 2008) Introduction to Astronomy Life as a Low-mass Star. Prof. D.C. Richardson Sections 0101-0106. What are the life stages of a low-mass star?. A star remains on the main sequence as long as it can fuse hydrogen into helium in its core. Thought Question.

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Chapter 17 Star Stuff

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Chapter 17 Star Stuff

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Chapter 21: Stars: From Adolescence to Old Age

Chapter 21: Stars: From Adolescence to Old Age. Recall: the H-R Diagram. Mass Determines Life Stages. Mass determines stages stars go through and how long they last in each stage with just little bit of dependence on composition Massive stars evolve faster than small stars

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Clicker Questions

Clicker Questions. Chapter 12 Stellar Evolution. Question 1. a) red giants. b) pulsars. c) black holes. d) white dwarfs. e) red dwarfs. Stars like our Sun will end their lives as. Question 1. a) red giants. b) pulsars. c) black holes. d) white dwarfs. e) red dwarfs.

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Main Sequence

Increasing Mass, Radius on Main Sequence. The Hertzsprung-Russell (H-R) Diagram. Red Supergiants. Red Giants. Sun. Main Sequence. White Dwarfs. Stellar Evolution: Evolution off the Main Sequence. Main Sequence Lifetimes Most massive (O and B stars): millions of years

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Contraction of Giant Molecular Cloud Cores

HW #13 read 9.4-end Questions 9.9, 9.13,9.14 Problems 9.7,9.8,9.9,9.11 extra time due next Thursday! We are proceding to CHap 10 stellar old age chap 11 The death of high mass stars. Contraction of Giant Molecular Cloud Cores. Horse Head Nebula. Thermal Energy (pressure). Magnetic Fields.

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Neutron Stars, Black Holes, and Relativity

Neutron Stars, Black Holes, and Relativity. Low Mass ( M < 8 M ? ) Stellar Evolution. Main Sequence (core hydrogen fusion) Red Giant Star (core contraction, shell hydrogen fusion) Helium Burner (helium fusion in core)

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Off the Main Sequence - The Evolution of a Sun-like Star Stages 7 - 9

Off the Main Sequence - The Evolution of a Sun-like Star Stages 7 - 9. Off the Main Sequence - The Evolution of a Sun-like Star Stages 7 - 9. These stages have already been discussed: Stage 1: Interstellar Cloud Stage 2: A Collapsing Cloud Fragment Stage 3: Fragmentation Ceases

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Star in a Box

Star in a Box. Exploring the lifecycle of stars. Stars in the Night Sky. What is a Star?. A cloud of gas, mainly hydrogen and helium. The core is so hot and dense that nuclear fusion can occur. This is where the energy comes from that makes the stars shine.

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Lifecycle of Stars

Lifecycle of Stars. By: Mark and Jacob . Nebula. A nebula is a cloud of gas and dust in space. Nebulae are the birthplaces of stars. There are different types of nebula.

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The Sun as a Star

The Sun as a Star. Susan Cartwright University of Sheffield. What do we know about the Sun?. Its size and its distance from us Its luminosity (energy generated per second) Its (surface) chemical composition and temperature How it generates energy Its (approximate) age

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NEBULA!

NEBULA!. A nebula is a cloud of gas and dust. Stars are formed in a nebula. The size of a nebula varies depending on the size of the original cloud of dust. http://nssdc.gsfc.nasa.gov/image/astro/hst_pillars_m16.jpg. Protostar !.

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Stellar Evolution

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Gliese 229B

Danielle Poindexter. Gliese 229B. How Far Away Is It?. Light travels at 186,000 miles per second. A light year is about 9.5 trillion kilometers or 5.88 trillion miles. 18 Light Years.

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CRCT Question

CRCT Question. What kind of weather is associated when a cold front approaches an area? sunny skies drizzly rain thunderstorms, heavy rain, or snow hot, muggy weather. Agree or Disagree . The universe is about 13.7 million years old The milky way is a spiral galaxy

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Stellar Evolution

Stellar Evolution. By: Brian Smith 2ndp. Interstellar Cloud. At this stage cloud of dust and gas start to clump together . As these clumps gather more mass their gravitational attraction increases , pulling more atoms into the clump. Cloud Fragment.

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Feb 21 Agenda

Feb 21 Agenda. Learning Target: I can explain the different types of star clusters and how different sized stars end their lives. Kick off: What is a T- tauri star? Vocabulary: 1. black dwarf 2. helium fusion pg. 495 3. helium Flash pg. 496 Star clusters and end of star life notes

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