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.
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。