In astronomy, a yellow dwarf is a small (about 1 to 1.4 solar masses), yellow main sequence star that is in the process of converting hydrogen to helium in its core by means of nuclear fusion.

Our Sun is the most well-known example of a yellow dwarf.

A yellow dwarf’s lifespan is about 10 billion years, until its supply of hydrogen runs out. When this happens, the star expands to many times its previous size and becomes a red giant. The star Betelgeuse is an example of a red giant. Eventually the red giant sheds its outer layers of gas, which become a planetary nebula, while the core collapses into a small, dense white dwarf.

The Yellow Dwarf is also a fairy tale by Madame d'Aulnoy.

Notes Regarding Yellow Dwarf Stars

• Temperature Range = 5400–6000 K
• Each second, the sun converts 500 million metric tons of hydrogen to helium. In turn, every second 5 million metric tons of excess material is converted into energy.

See also

• Solar twin

Star typesYellow dwarfs

Gelber Zwerg | Enana amarilla | Naine jaune | Gele dwerg | Żółty karzeł | Жёлтый карлик | Žltý trpaslík | Gul dvärg | 黃矮星