Spherical region of the observable universe surrounding an observer beyond which objects recede from that observer at a rate greater than the speed of light due to the expansion of the Universe
región del universo que rodea a un observador, más allá de la cual los objetos se alejan del mismo a una velocidad mayor que la velocidad de la luz debido a la expansión del universo (es)
spherical region of the observable universe surrounding an observer beyond which objects recede from that observer at a rate greater than the speed of light due to the expansion of the Universe (en)