Hubble constant
1
哈勃常数, 哈勃参数
(cosmology) a measure of the rate at which the universe is expanding, determined from the observation of distant galaxies' recession velocities
- The Hubble constant tells us how quickly the universe is expanding.
哈勃常数告诉我们宇宙膨胀的速度有多快。
- Astronomers use the Hubble constant to estimate the age of the universe.
天文学家使用哈勃常数来估计宇宙的年龄。
- The value of the Hubble constant has been refined over the years.
哈勃常数的值多年来一直在完善。
- The Hubble constant is expressed in kilometers per second per megaparsec.
哈勃常数以每秒公里每百万秒差距表示。
- Precise measurements of the Hubble constant are crucial for cosmological models.
对哈勃常数的精确测量对于宇宙学模型至关重要。