宇宙之大 難以想像 許多星系與地球距離論以億光年計 所以我們觀測到的已是歷史了非現況 宇宙之大 难以想像 许多星系与地球距离论以亿光年计 所以我们观测到的已是历史了非现况 The size of the universe is unimaginable. The distance between many galaxies and the earth is measured in hundreds of millions of light-years. Therefore, what we observe is history and not the current situation.