如果暗能量继续分离宇宙，我们的银河系就会变成孤独的前哨。再过1000亿年，大多数比邻的星系将会从视野里消失。
If dark energy continues pushing the universe apart , our milky-way galaxy could become a lonely outpost , a hundred billion years from now , most of our galactic neighbors will be out of sight .
比邻星系