Note that the present ageof the universe follows from the expansion history and present expansion rate.
请注意，目前的宇宙年龄是由宇宙当前的膨胀速率所估计的。
2
The size and ageof the universe, as well as how fast it is expanding, has been confirmed with a new, precise method that USES galaxies as lenses to look at other galaxies.
拿星系作为透镜来观察其它星系，这种全新的、精确的手段确认了宇宙的大小和年龄，及其膨胀的速度。
3
Keck is helping astronomers determine the ageof the universe and its expansion rate as well as allowing them to watch the birth of stars in other galaxies.