(astronomy) A star that is located in the main sequence in the Hertzsprung-Russell diagram; fuses hydrogen into helium in its core.

Betula nana, a species of birch in the family Betulaceae, native to arctic and cool temperate regions of northern Europe, northern Asia and northern North America.

plural of dwarf planet

A plant in the taxonomic genus Equisetum (horsetails); Equisetum scirpoides.

(astronomy) A dying star of low or medium mass, more solid and dense but less bright than the sun.

(astronomy) An icy planetoid: an astronomical object, such as Pluto, Sedna or (for some authors) Ceres that is large enough to be a world and contains more ice than a typical asteroid.

(astronomy) A small, relatively cool star of the main sequence; most stars in the Milky Way are red dwarfs.

(astronomy) A starlike object that contracts to about the volume of the planet Jupiter after its formation phase; its mass may range from several times that of Jupiter, such that it fuses deuterium, up to just below the threshold of sustained hydrogen fusion.

(astronomy) A hypothesized white dwarf that has cooled down and no longer emits visible light.

plural of brown dwarf