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Booklet 5 – Stellar Processes and Evolution
Booklet 5 – Stellar Processes and Evolution

Chapter 13
Chapter 13

... • Increased luminosity, expands outer surface to red supergiant sizes and temperature down to 2500 K • Carbon and silicon flakes (grains) form in this cool environment and are driven out by radiation pressure • The grains carry the gas into space – a planetary nebula is formed – and the inner core b ...
Nova
Nova

... Roche lobe, gas moves into the Roche lobe of the companion star and is pulled in toward that star. This process of mass transfer is referred to as Roche lobe overflow. Binaries in this stage of mass transfer are called semi-detached binaries, because only one of the stars is actually in contact with ...
Astronomy Assignment #10 Solutions
Astronomy Assignment #10 Solutions

... 1. Two identical stars have different apparent brightnesses (fluxes). One star is 10 parsecs away from us and the other is 30 parsecs away from you. Which star is brighter and by how many times? The brightness of a star depends on two factors; its luminosity and its distance. This is summarized in L ...
January 2006
January 2006

... Theory and Experiment • Theory: – Need a theory for star formation – Need a theory to understand the energy production in stars  make prediction how bight stars are when and for how long in their lifetimes ...
Solutions: Doppler Effect
Solutions: Doppler Effect

... At that time, Star B is moving directly away from Earth • Go to: http://www.howstuffworks.com/planet-hunting2.htm • Read the material and watch the animation. 7. How do we use the Doppler effect to help us detect the presence of planets around other stars? Because the planet tugs on the star (gravit ...
WORD - UWL faculty websites
WORD - UWL faculty websites

Star in a Box
Star in a Box

Young Stars
Young Stars

... •It burns at exactly the right rate to replace the energy lost •For the Sun, there is enough fuel in the central part to keep it burning steadily for 10 billion years •All stars are in a balance of pressure vs. gravity •To compensate for larger masses, they have to be bigger R  M •They have lower d ...
Stellar Evolution in the HR Diagram
Stellar Evolution in the HR Diagram

Today`s Powerpoint
Today`s Powerpoint

... Such short-lived stars spend all their lives in the stellar nursery of their birth, so emission nebulae mark sites of ongoing star formation. Many stars of lower mass are forming too, but make few UV photons. Why "H II Region? H I: Hydrogen atom H II: Ionized Hydrogen ...
Oct5
Oct5

... Origin of the Elements * All the carbon, oxygen, etc on the Earth, (and in humans) was produced in the centers of stars. * Most carbon, oxygen comes from low-mass red giant winds * Most of the heavy elements come from supernovae * New stars form out of interstellar gas which has been enriched with ...
Laboratory Procedure (Word Format)
Laboratory Procedure (Word Format)

... Let us consider the above diagram where the earth is regarded as moving in a circular orbit about the sun. The star lies in the plane of the ecliptic and is assumed to be stationary at an indefinitely great distance from the sun. At point A in its orbit, the earth is moving directly away from the st ...
Compact stars
Compact stars

... collapse of an ordinary star to a neutron star would liberate a large amount of gravitational potential energy, providing a possible explanation for supernovae. This is the explanation for supernovae of types Ib, Ic, and II. Such supernovae occur when the iron core of a massive star exceeds the Chan ...
10438 starlight - The Described and Captioned Media Program
10438 starlight - The Described and Captioned Media Program

Super Giant
Super Giant

ppt
ppt

CHARACTERISTICS OF STARS
CHARACTERISTICS OF STARS

Student 1
Student 1

Astronomy and Space Science
Astronomy and Space Science

... m, d, M, L, R, T are related. Both m and T are directly measurable, but d has to be obtained from observations like parallax. However, once d is found, M, L, R can be calculated easily. This is an amazing achievement - even to date, the radius can be measured directly, by resolving the stellar disk, ...
ASTR 1120 General Astronomy: Stars and Galaxies
ASTR 1120 General Astronomy: Stars and Galaxies

Absolute magnitude
Absolute magnitude

Solutions Assignment #3
Solutions Assignment #3

... The flux of solar radiation at the surface of this imaginary sphere is the luminosity of the Sun divided by the surface area of the sphere: 3.8 1026 watts 1344 watts per square meter 2.83 1023 m2 c. The average power per square meter collected by a solar collector on the ground will always be less b ...
PHYS3380_102615_bw
PHYS3380_102615_bw

... We have observed disks around other stars. These could be new planetary systems in formation. ...
David`s Mapping the Heavens[1]
David`s Mapping the Heavens[1]

... Stars are blazing balls of gas where many kinds of atoms emit light of all colours. If you look at the spectrum you should therefore see all colours of the spectrum present. ...
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Dyson sphere

A Dyson sphere is a hypothetical megastructure that completely encompasses a star and hence captures most or all of its power output. It was first described by Olaf Stapledon in his science fiction novel, ""Star Maker"". The concept was later popularly adopted by Freeman Dyson. Dyson speculated that such structures would be the logical consequence of the long-term survival and escalating energy needs of a technological civilization, and proposed that searching for evidence of the existence of such structures might lead to the detection of advanced intelligent extraterrestrial life. Different types of Dyson spheres correlate with information on the Kardashev scale.Since then, other variant designs involving building an artificial structure or series of structures to encompass a star have been proposed in exploratory engineering or described in science fiction under the name ""Dyson sphere"". These later proposals have not been limited to solar-power stations. Many involve habitation or industrial elements. Most fictional depictions describe a solid shell of matter enclosing a star, which is considered the least plausible variant of the idea (see below). In May 2013, at the Starship Century Symposium in San Diego, Dyson repeated his comments that he wished the concept had not been named after him.
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