Yellow Dwarf :-
These stars are also known as “G-type main-sequence stars.”
Our sun (which is one solar mass) is a yellow dwarf star.About 10% of stars in the Milky Way are dwarf yellow dwarf. Their surface temperature is up to approx. 6000 degrees Celsius.
At these kind of stars dies a black dwarf. At the end of their lives they first becomes red dwarfs then converts into white dwarfs and then finally converts into a black a black dwarf when their nuclear fuel gets completely exhausted.
The phrase “yellow dwarf” isn’t quite right, because not all yellow dwarf stars are yellow. Some are white. Our sun is one of these; it is actually white. People perceive it as yellow because we view it through our atmosphere, which distorts its color. The Sun is in fact white, and its spectrum peaks in blue and green light, but it can often appear yellow, orange or red through Earth's atmosphere due to atmospheric Rayleigh scattering, especially at sunrise and sunset. In addition, although the term "dwarf" is used to contrast yellow main-sequence stars from giant stars, yellow dwarfs like the Sun outshine 90% of the stars in the Milky Way (which are largely much dimmer orange dwarfs, red dwarfs, and white dwarfs, the last being a stellar remnant).
A G-type main-sequence star will fuse hydrogen for approximately 10 billion years, until it is exhausted at the center of the star. When this happens, the star expands to many times its previous size and becomes a red giant, such as Aldebaran (or Alpha Tauri). Eventually the red giant sheds its outer layers of gas, which become a planetary nebula, while the core rapidly cools and contracts into a compact, dense white dwarf.
The phrase “yellow dwarf” isn’t quite right, because not all yellow dwarf stars are yellow. Some are white. Our sun is one of these; it is actually white. People perceive it as yellow because we view it through our atmosphere, which distorts its color. The Sun is in fact white, and its spectrum peaks in blue and green light, but it can often appear yellow, orange or red through Earth's atmosphere due to atmospheric Rayleigh scattering, especially at sunrise and sunset. In addition, although the term "dwarf" is used to contrast yellow main-sequence stars from giant stars, yellow dwarfs like the Sun outshine 90% of the stars in the Milky Way (which are largely much dimmer orange dwarfs, red dwarfs, and white dwarfs, the last being a stellar remnant).
A G-type main-sequence star will fuse hydrogen for approximately 10 billion years, until it is exhausted at the center of the star. When this happens, the star expands to many times its previous size and becomes a red giant, such as Aldebaran (or Alpha Tauri). Eventually the red giant sheds its outer layers of gas, which become a planetary nebula, while the core rapidly cools and contracts into a compact, dense white dwarf.
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