A dwarf star is a star of relatively small size and low luminosity. Most main sequence stars are dwarf stars. The meaning of the word "dwarf" was later extended to some star-sized objects that are not stars, and compact stellar remnants that are no longer stars.

dwarf star, any star of average or low luminosity, mass, and size. Important subclasses of dwarf stars are white dwarfs (see white dwarf star) and red dwarfs. Dwarf stars include so-called main-sequence stars, among which is the Sun.

What is a Dwarf Star? The term “dwarf star” was created by Ejnar Hertzsprung in 1906. He used it to distinguish prominent K and M-type stars that are either brighter or dimmer than the Sun. Those that are bigger and much brighter are called “giant …

Oct 22, 2024 · Red dwarfs are the smallest main sequence stars – just a fraction of the Sun’s size and mass. They’re also the coolest, and appear more orange in color than red.

Mar 17, 2025 · Red dwarfs are the coolest main-sequence stars, with a spectral type of M and a surface temperature of about 2,000–3,500 K. Because these stars are so cool, spectral lines of molecules such as titanium oxide, which would be disassociated in hotter stars, are …

A black dwarf is a theoretical stellar remnant, specifically a white dwarf that has cooled sufficiently to no longer emit significant heat or light. Because the time required for a white dwarf to reach this state is calculated to be longer than the current age of the universe (13.8 billion years), no black dwarfs are expected to exist in the ...

Mar 12, 2025 · White dwarf star, any of a class of faint stars representing the endpoint of the evolution of intermediate- and low-mass stars. White dwarf stars are characterized by a low luminosity, a mass on the order of that of the Sun, and a radius comparable to that of Earth.

Jun 6, 2019 · Red dwarf stars make up the largest population of stars in the galaxy, but they hide in the shadows, too dim to be seen with the naked eye from Earth.

A Dwarf Star is the most common type of star in the universe. Stars are grouped into two kinds, Dwarf, such as our own Sun and Giant Stars, which can be many times bigger than the Earth, such as Antares.

Apr 25, 2023 · White dwarfs are the hot, dense remnants of long-dead stars. They are stellar cores, left behind when stars exhaust their fuel supplies and blow their gases into space.