Astronomers and cosmologists and physicists think that there is something called dark matter in the universe, which makes up 23 percent of the universe, and something called dark energy, which permeates the fabric of space-time, that
Los astrónomos, cosmólogos y físicos piensan que hay algo llamado "materia oscura" que constituye el 23% del Universo y algo llamado "energía oscura" que impregna el tejido del espacio-tiempo,