Lecture 31: The Properties of Stars
... of stars. The color of a star depends on its temperature: cooler stars are redder, hotter stars are blue. Luminosity, the total energy output expressed in Watts or Solar Luminosities, depends on the radius and temperature. The absorption spectra of stars form a distinct sequence with stellar tempera ...
... of stars. The color of a star depends on its temperature: cooler stars are redder, hotter stars are blue. Luminosity, the total energy output expressed in Watts or Solar Luminosities, depends on the radius and temperature. The absorption spectra of stars form a distinct sequence with stellar tempera ...
Hertzsprung-Russell Diagram
... Most stars have very similar spectral lines indicating the same elements, but the intensity of the lines vary. The various intensities are caused by the energy (temperature) available for the jumps to occur. ...
... Most stars have very similar spectral lines indicating the same elements, but the intensity of the lines vary. The various intensities are caused by the energy (temperature) available for the jumps to occur. ...
Stellar Characteristics and Evolution
... sometimes known as the “Mira Giants”), becoming so great that the star actually starts to shed significant amounts of mass into space. Eventually, the star's outer layers are blown off completely, producing a planetary nebula and leaving behind an Earth-sized White Dwarf (size D, or VII) - what was ...
... sometimes known as the “Mira Giants”), becoming so great that the star actually starts to shed significant amounts of mass into space. Eventually, the star's outer layers are blown off completely, producing a planetary nebula and leaving behind an Earth-sized White Dwarf (size D, or VII) - what was ...
Stellar Evolution
... • Mass of Sun • Radius of Earth • Hot as Sun’s core • A million times denser than lead • Slowly cool off ...
... • Mass of Sun • Radius of Earth • Hot as Sun’s core • A million times denser than lead • Slowly cool off ...
Chapter 13: Interstellar Matter and Star Formation
... Dust grains make up only 1% of the mass of the interstellar medium. 5. Interstellar extinction is the effect by which starlight is blocked completely by interstellar material. 6. The light from distant stars is reddened by the dust through which it passes because dust grains scatter blue light more ...
... Dust grains make up only 1% of the mass of the interstellar medium. 5. Interstellar extinction is the effect by which starlight is blocked completely by interstellar material. 6. The light from distant stars is reddened by the dust through which it passes because dust grains scatter blue light more ...
Worksheet 3 - Perimeter Institute
... stars in the galaxy UGC 11748. They found that most of the stars lie within a radius r = 1.64 x 1020 m and that the total mass within this radius is 1.54 x 1041 kg, or 77.4 billion times the mass of the Sun. It is expected that the stars that lie outside this radius will orbit in the same way that p ...
... stars in the galaxy UGC 11748. They found that most of the stars lie within a radius r = 1.64 x 1020 m and that the total mass within this radius is 1.54 x 1041 kg, or 77.4 billion times the mass of the Sun. It is expected that the stars that lie outside this radius will orbit in the same way that p ...
File
... that star is made of. • Prisms can be used to separate the colors of white light. The various wavelengths making up white light bend at different angles when they pass through the prism. They separate from each other and the colors of the visible light spectrum become visible. • The visible light sp ...
... that star is made of. • Prisms can be used to separate the colors of white light. The various wavelengths making up white light bend at different angles when they pass through the prism. They separate from each other and the colors of the visible light spectrum become visible. • The visible light sp ...
Solutions
... to the core of the main sequence star; the hotter and denser core allows for faster fusion.) Note: a few of you in your argument mentioned that the sun would be “more massive” as a red giant. This is incorrect! The Sun will not be more massive; it doesn’t pull in any extra matter from anywhere. It w ...
... to the core of the main sequence star; the hotter and denser core allows for faster fusion.) Note: a few of you in your argument mentioned that the sun would be “more massive” as a red giant. This is incorrect! The Sun will not be more massive; it doesn’t pull in any extra matter from anywhere. It w ...
Sample Stellar Evolution TEST QUESTIONS
... 11. The Orion region contains young main sequence stars and an emission nebula. 12. The thermal motions of the atoms in a gas cloud can make it collapse to form a protostar. 13. The pressure of a gas generally depends on its temperature and its density. 14. Stars swell into giants when hydrogen is e ...
... 11. The Orion region contains young main sequence stars and an emission nebula. 12. The thermal motions of the atoms in a gas cloud can make it collapse to form a protostar. 13. The pressure of a gas generally depends on its temperature and its density. 14. Stars swell into giants when hydrogen is e ...
guide to orion 3-d flythrough
... The central area of the nebula is called the Trapezium cluster. It is dominated by four young, massive stars in a kite-like arrangement. The brightest of these stars, which has a luminosity 100,000 times that of the Sun, provides the energy that creates the nebula as we see it. It produces a flood o ...
... The central area of the nebula is called the Trapezium cluster. It is dominated by four young, massive stars in a kite-like arrangement. The brightest of these stars, which has a luminosity 100,000 times that of the Sun, provides the energy that creates the nebula as we see it. It produces a flood o ...
AAS/AAPT meeting consolidated synopses by Richard Berry PDF
... Stardial is a CCD camera located on the roof of the Astronomy Building at the University of Illinois in Urbana, IL. The camera has operated continuously since 1996, imaging a band of the sky centered on declination –4° by drift scanning a Kodak KAF 400 CCD at the focus of a 50 mm f/2 camera lens. Th ...
... Stardial is a CCD camera located on the roof of the Astronomy Building at the University of Illinois in Urbana, IL. The camera has operated continuously since 1996, imaging a band of the sky centered on declination –4° by drift scanning a Kodak KAF 400 CCD at the focus of a 50 mm f/2 camera lens. Th ...
Cosmic Particle Accelerator - Max-Planck
... magnetic field,” says Paneque. As a result, strong electric fields occur in the polar regions, which accelerate electrons and their antiparticles (positrons) to almost the speed of light. These then generate the gamma radiation when they interact with their surroundings. This can be imagined to be s ...
... magnetic field,” says Paneque. As a result, strong electric fields occur in the polar regions, which accelerate electrons and their antiparticles (positrons) to almost the speed of light. These then generate the gamma radiation when they interact with their surroundings. This can be imagined to be s ...
07-01TheColsmologicalDistanceLadder
... • A sub-Chandrasekhar white dwarf • A less dense companion star 2. Gravity strips material off companion star 3. Dwarf gets more and more massive 4. Mass exceeds Chandrasekhar limit (1.4 Msun) 5. Kablooey 6. Kablooey has a certain absolute magnitude 7. Kablooey is very very bright. 8. Use apparent/a ...
... • A sub-Chandrasekhar white dwarf • A less dense companion star 2. Gravity strips material off companion star 3. Dwarf gets more and more massive 4. Mass exceeds Chandrasekhar limit (1.4 Msun) 5. Kablooey 6. Kablooey has a certain absolute magnitude 7. Kablooey is very very bright. 8. Use apparent/a ...
Astronomy 110 Announcements: 11.1 Properties of Stars
... It would be only 1/3 as bright It would be only 1/6 as bright It would be only 1/9 as bright It would be three times brighter ...
... It would be only 1/3 as bright It would be only 1/6 as bright It would be only 1/9 as bright It would be three times brighter ...
Advances in Environmental Biology Approach Mahin Shahrivar and
... ton of this produces Helium and the left 4 million ton as 0.7% is the consumptive case and the same left degree is changed to the energy publishing as the light and heat [16]. Our sun is about 5 milliard years old and about 4.5 milliard years later it will be ended up by consumption its hydrogen; in ...
... ton of this produces Helium and the left 4 million ton as 0.7% is the consumptive case and the same left degree is changed to the energy publishing as the light and heat [16]. Our sun is about 5 milliard years old and about 4.5 milliard years later it will be ended up by consumption its hydrogen; in ...
The structure and evolution of stars
... (which we derived). We know the surface temperature (Teff=5780K) is much smaller than its minimum mean temperature (2×106 K). Thus we make two approximations for the surface boundary conditions: ρ = T = 0 at r=rs i.e. that the star does have a sharp boundary with the surrounding vacuum ...
... (which we derived). We know the surface temperature (Teff=5780K) is much smaller than its minimum mean temperature (2×106 K). Thus we make two approximations for the surface boundary conditions: ρ = T = 0 at r=rs i.e. that the star does have a sharp boundary with the surrounding vacuum ...
Kroupa - SatelliteGa.. - University of Hertfordshire
... same plane - in a kind of disk shape - and that they revolve in the same direction around the Milky Way (in the same way as planets in the Solar System revolve around the Sun). Professor Kroupa and the other physicists believe that this can only be explained if today’s satellite galaxies were creat ...
... same plane - in a kind of disk shape - and that they revolve in the same direction around the Milky Way (in the same way as planets in the Solar System revolve around the Sun). Professor Kroupa and the other physicists believe that this can only be explained if today’s satellite galaxies were creat ...
The Milky Way
... The flux received from the light is proportional to its intrinsic brightness or luminosity (L) and inversely proportional to the square of the distance (d): ...
... The flux received from the light is proportional to its intrinsic brightness or luminosity (L) and inversely proportional to the square of the distance (d): ...