Where h is the proportional constant , 公式中的h是一个比例常数,我们称之为
The proportionality constant , h , is known as the hubble constant and quantifies how fast space is stretching ? not just around us but around any observer in the universe 其中的比例常数h ,就是所谓的哈伯常数,它可以把空间向外延伸的快慢予以量化,不只针对我们周遭,也适用于宇宙中所有观测者的周围。