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Astron 104 Laboratory #7 Nuclear Fusion and Stars
Astron 104 Laboratory #7 Nuclear Fusion and Stars

... You are intimately linked to the nuclear fusion that occurs in stars. Life on Earth thrives on sunlight, which originates as energy produced at the center of the Sun as hydrogen is fused to form helium. Even the very atoms and molecules of your body — iron in your blood, calcium in your bones, phosp ...
Neutron Star - Perry Local Schools
Neutron Star - Perry Local Schools

... • What natural cycles do stars go through? • In a way that is similar to other natural cycles, stars are born, go through various stages of development, and eventually die. • The sun formed from a cloud of gas and dust. – The sun formed about 5 billion years ago. – Stars do not last forever. – The s ...
PHY111 Stellar Evolution
PHY111 Stellar Evolution

... unstable nuclei decay before next capture, so this makes nuclei close to line of maximum stability, and generally next to other stable nuclei makes very unstable neutron-rich nuclei which produce stable nuclei by β-decay, so can’t make nuclei where the β-decay path is blocked ...
Stars - TeacherWeb
Stars - TeacherWeb

... – Smaller stars will live on for billions of years because they burn their fuel much more slowly ...
Einstein
Einstein

... light is emitted by charged particles moving close to the speed of light around magnetic fields. • Emission (mostly radio) is concentrated at the magnetic poles and focused into a beam. • Whether we see a pulsar depends on the geometry. – if the polar beam sweeps by Earth’s direction once each rotat ...
Lives of stars HR
Lives of stars HR

Chapter 10 Measuring the Stars: Giants, Dwarfs, and the Main
Chapter 10 Measuring the Stars: Giants, Dwarfs, and the Main

... • Transverse - perpendicular to line of sight • Radial - along our line of sight * ___________________ - annual movement of a star across the sky as seen from Earth • _____________________ has the largest known proper motion of any star ...
Degeneracy pressure Normal/degeneracy pressure White dwarfs — Oct 10
Degeneracy pressure Normal/degeneracy pressure White dwarfs — Oct 10

... • End of the road: planetary nebula & white dwarf core ...
1. Base your answer to the following question
1. Base your answer to the following question

... the standard spectrum to the spectrum produced from this distant star? (1) The star’s spectral lines have shifted toward the ultraviolet end of the spectrum and the star is moving toward Earth. (2) The star’s spectral lines have shifted toward the infrared end of the spectrum and the star is moving ...
Calculating Main Sequence Lifetimes
Calculating Main Sequence Lifetimes

... ‘short’ period the stellar temperature decreases without a great change of luminosity. The star burns Hydrogen in shell (red giants) through the CNO cycle: as its radius increases so its luminosity raises. Helium flash: the star begins to burn Helium maintaining the combustion of Hydrogen in shells. ...
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Stars Chapter 21
Stars Chapter 21

... • Extends from the upper left corner to the lower right corner ...
Astr40 HWII - Empyrean Quest Publishers
Astr40 HWII - Empyrean Quest Publishers

7a Properties of Stars.pptx
7a Properties of Stars.pptx

... •  Measured  in  light-­‐years  –  distance  light  travels  in   one  year  (9.5  x  1012    or  9.5  trillion  kilometers)   ...
MSci Astrophysics 210PHY412 - Queen's University Belfast
MSci Astrophysics 210PHY412 - Queen's University Belfast

... Students should be able to understand the basic physics underlying complex stellar evolution models Students will learn how to interpret observational characteristics of stars in terms of the underlying physical parameters You should gain an understanding of how stars of different mass evolve, and w ...
jackie822 beanerbutt777 life cycle of a star
jackie822 beanerbutt777 life cycle of a star

... http://solarsystem.nasa.gov/multimedia/gallery/prominence.gif ...
Astronomical Numbers
Astronomical Numbers

... flat earth under a domed sky. 3) From Earth, stars appear to move in circles around Polaris, the North Star. ...
Chapter16
Chapter16

... absorption line — A dark line superimposed on a continuous spectrum when a gas absorbs light from a continuous source that is hotter than the absorbing gas. antapex — The direction in the sky away from which the Sun is moving. Because of the Sun’s motion, nearby stars appear to converge toward the a ...
Slide 1
Slide 1

... which predicts an effect 8 times larger than a classical approach! Even so the angle with b as the solar radius is at most only 1.74” of arc, a difficult measurement which has been tested (Eddington 1914,1919) but with an error factor. Radio time delays via interplanetary satellites in the extra pat ...
Phobos
Phobos

... observations of galaxy clusters, distances have been estimated to 38 galaxy clusters ranging from 1.4 to 9.3 billion light-years. The results give a Hubble constant of 77 km/s per megaparsec, with an uncertainty of about 15%, thereby reinforcing other recent values. The implied age of the Universe i ...
pptx
pptx

... • A hydrogen atom consists of 1 proton and 1 electron. • Inside of a star, the protons and electrons are detached from each other, and move around freely by themselves. • At lower temperatures, protons move slowly, so they repel ...
Basic Properties of Stars
Basic Properties of Stars

... wrestlers ...
ISP 205: Visions of the Universe
ISP 205: Visions of the Universe

RED GIANTS
RED GIANTS

... • The star can no longer support its weight • The enormous weight from the outer layers compresses hydrogen in the layers just outside the core enough to initiate shell hydrogen fusion. • This extra internal heat causes the outer layers to expand into a giant star. ...
Lecture 13 (pdf from the powerpoint)
Lecture 13 (pdf from the powerpoint)

... •Gravitational contraction reaches hot enough for fusion •0.08 M sun •88 M Jupiter • smaller > Brown dwarf •Upper limit ~ 100Msun ...
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Future of an expanding universe

Observations suggest that the expansion of the universe will continue forever. If so, the universe will cool as it expands, eventually becoming too cold to sustain life. For this reason, this future scenario is popularly called the Big Freeze.If dark energy—represented by the cosmological constant, a constant energy density filling space homogeneously, or scalar fields, such as quintessence or moduli, dynamic quantities whose energy density can vary in time and space—accelerates the expansion of the universe, then the space between clusters of galaxies will grow at an increasing rate. Redshift will stretch ancient, incoming photons (even gamma rays) to undetectably long wavelengths and low energies. Stars are expected to form normally for 1012 to 1014 (1–100 trillion) years, but eventually the supply of gas needed for star formation will be exhausted. And as existing stars run out of fuel and cease to shine, the universe will slowly and inexorably grow darker, one star at a time. According to theories that predict proton decay, the stellar remnants left behind will disappear, leaving behind only black holes, which themselves eventually disappear as they emit Hawking radiation. Ultimately, if the universe reaches a state in which the temperature approaches a uniform value, no further work will be possible, resulting in a final heat death of the universe.
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