Although Italian by birth, maritime explorer Christopher Columbus sailed across the Atlantic Ocean and discovered the Americas under the Spanish emperorâs name. During his first voyage, he led three Spanish galleons, the NiÃ±a, Pinta, and the Santa Maria.
Instead of the general notion that a void is a region of space with a low cosmic mean density; a hole in the distribution of galaxies, it defines voids to be regions in which matter is escaping; which corresponds to the Dark Energy equation of state, w.
Astronomy a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. (usually cap.) See Milky Way. any large and brilliant or impressive assemblage of persons or things:a galaxy of opera stars.