一种宇宙学时标，是哈勃常数的倒数。
多亏撞上了极大的好运气，美国宇航局恰好在适当的时间将哈勃太空望远镜恰好对准了适当的位置，在胶片上捕捉到了这些图像。
Through an enormous stroke of luck, NASA aimed the Hubble Telescope at precisely the right place at precisely the right time to capture these images on film.
哈勃的观测对这组相互作用四重星系的故事增加了新的重要线索，让天文学家确定星系遭遇开始的时间，并预言未来并合的情况。
The Hubble observations have added important clues to the story of this interacting foursome, allowing astronomers to determine when the encounter began and to predict a future merger.
像这样的伪时间和旅行每天都在发生并被我们人类的探测工具（仅举几个例子，如哈勃空间望远镜、设置在夏威夷的一部庞大的凯克望远镜和钱德拉X射线观测卫星）拍摄下来。
Pseudo-time travel like this happens every day, with pictures taken by the Hubble Space Telescope, the mammoth Keck telescopes in Hawaii and the Chandra X-ray Observatory satellite to name just a few.
应用推荐