Small dense compact star, no longer radiating, which is the final state of a white dwarf or results when a star is too small to initiate nuclear fusion.
A non-radiating ball of gas that results either when a white dwarf radiates all its energy or when gas contracts gravitationally but contains too little mass to begin nuclear fusion.
A presumed final state of evolution for a low-mass star, in which all of its energy sources are exhausted and it no longer emits significant radiation.
An electron-degenerate star which has cooled until it gives too little radiation to be detected at interstellar distances.
A cold celestial object thought to be the remains of a dead star of low mass that is formed after a white dwarf star has radiated away most of its heat energy. Black dwarfs are extremely difficult to detect, and because white dwarfs take so long to cool down, it is possible that the Universe may not yet be old enough for any black dwarfs to develop.
a star in it's final stages after it has used its energy supplies as a white dwarf
a very small star that emits no detectable light
the burned — out core of a white dwarf star.
A black dwarf is a star in the final stages of its evolution. It follows millions of years after the white dwarf stage when all energy sources have been expended and the star no longer emits any radiation.
One possible final stage in the evolution of a star, in which all the energy is exhausted and it no longer emits radiation.
A non-radiating ball of gas resulting from either a white dwarf that has exhausted all its energy, or cloud of gas that has contracted but contains too little mass to begin nuclear fusion.
The end-point of the evolution of an isolated, low-mass star. After the white dwarf stage, the star cools to the point where it is a dark clinker in interstellar space.
The end state of a white dwarf that has cooled to a low temperature
A black dwarf is a small, very dense, cold, dead star. It is made mostly of carbon. This dark star is what remains after a red giant star loses its outer layers, forming a planetary nebula and then a white dwarf. The nuclear core of a black dwarf is depleted. Black dwarfs are about the size of the Earth (but tremendously heavier)! Our sun will someday turn into a black dwarf.
The end stage of a small star, that has lost its energy and has died.
A dead star, which has used up all its reserves of energy. The ultimate fate of a White Dwarf.
A black dwarf is a hypothetical astronomical object: a white dwarf so old that it has cooled down so that it no longer emits significant heat or light. None are expected to exist yet, since the time required for a white dwarf to cool down is calculated to be longer than the current age of the universe.