An enormous spiral form with collapsing gas clouds, condensing planetary systems, luminous supergiants, stable middle-aged suns, red giants, white dwarfs, planetary nebulas, supernovas, neutron stars, pulsars, black holes and, there is every reason to think,
Una enorme espiral con nubes de gas explotando, condensando sistemas planetarios, luminosas supergigantes, soles estables de mediana edad, gigantes rojas, enanas blancas, nebulosas planetarias, supernovas, estrellas de neutrones, pulsares, agujeros negros