G-type main-sequence star

<p>A G-type main-sequence star (spectral type: G-V), also often, and imprecisely, called a yellow dwarf, or G star, is a <a href="/facts/Main_sequence/DJ3Wq8kd">main-sequence star</a> (luminosity class V) of <a href="/facts/Stellar_classification/dYrIuK9H">spectral type</a> G. Such a star has about 0.9 to 1.1 <a href="/facts/Solar_mass/j6Auhku8">solar masses</a> and an <a href="/facts/Effective_temperature/RY30DaSY">effective temperature</a> between about 5,300 and 6,000 <a href="/facts/Kelvin/E3trzC4C">K</a> (5,000 and 5,700 <a href="/facts/Celsius/okAEu1CA">°C</a>; 9,100 and 10,000 <a href="/facts/Fahrenheit/2TVmyJod">°F</a>). Like other main-sequence stars, a G-type main-sequence star converts the <a href="/facts/Chemical_element/0jducgWD">element</a> <a href="/facts/Hydrogen/BoYHjl0J">hydrogen</a> to <a href="/facts/Helium/yRul93TG">helium</a> in its core by means of <a href="/facts/Nuclear_fusion/hP0gLDqj">nuclear fusion</a>. The <a href="/facts/Sun/CadPCVHh">Sun</a>, the star in the center of the <a href="/facts/Solar_System/QIcLSazQ">Solar System</a> to which the Earth is gravitationally bound, is an example of a G-type main-sequence star (G2V type). Each second, the Sun fuses approximately 600 million <a href="/facts/Ton/HDTb0fQo">tons</a> of hydrogen into helium in a process known as the <a href="/facts/Proton%25E2%2580%2593proton_chain/UUDAR9yW">proton–proton chain</a> (4 hydrogens form 1 helium), <a href="/facts/Mass%25E2%2580%2593energy_equivalence/ExXawGcc">converting</a> about 4 million tons of <a href="/facts/Matter/osyc04UN">matter</a> to <a href="/facts/Energy/wd8PrQM7">energy</a>. Besides the <a href="/facts/Sun/CadPCVHh">Sun</a>, other well-known examples of G-type main-sequence stars include <a href="/facts/Alpha_Centauri/6BlySfIj">Alpha Centauri</a>, <a href="/facts/Tau_Ceti/1tzg8cmQ">Tau Ceti</a>, and <a href="/facts/51_Pegasi/8S6XgMo1">51 Pegasi</a>.
</p>

G-type main-sequence star open-in-new

G-type main-sequence star