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Main sequence
In astronomy, the main sequence is a continuous and distinctive band of stars that appears on ... Main-sequence stars with more than two solar masses undergo convection in their core regions, which ... |
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Post-Main Sequence Stars - Australia Telescope National Facility
What happens when a main sequence star runs out of hydrogen in its core? ... Convection transports the energy to the outer layers of the star from the ... Hydrogen fusion in the shell produces more helium. ... As the cloud expands it cools but the dust absorbs and re-emits the radiation from the star at longer wavelengths. |
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The Life Cycles of Stars - Imagine the Universe! - NASA
This energy from fusion pours out from the core, setting up an outward pressure in ... . Near the end of its nuclear burning stage, such a star expels most of its outer material ... . The main sequence along the HR diagram is not a singular evolutionary path, ... It tells us that the wavelength at which a star emits its maximum light ... |
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Lecture summary notes -- text
The color depends on the surface temperature of the star; that is, how hot the ... as “blackbodies”: they are self-luminous, and the shape of the emitted spectrum ... of a star if a large fraction of its hydrogen atoms are in the n=2 energy state But ... . are more common The more frequent collisions in a main sequence star makes ... . |
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Hawley_99_Astro lectures - Institute of Astronomy
8. After the main sequence ... If we measure the total energy given off by the star and its temperature, how now can we determine the star's diameter? Star 1 and star 2 ... The distance between the peaks is the wavelength of the light. ... Different astronomical objects emit most of their radiation in different parts of the spectru... |
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Stars
While the Sun is a star, and most stars are similar in some way to the Sun, they are not ... . depends on both how close the star is and how much energy it is emitting. ... It would be ridiculous to measure its size of p with degrees or arc minutes, ... .. The Main Sequence stretches from the low luminosity, low temperature stars in ... |