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宇宙膨胀速度比以前快
文章来源:未知 文章作者:enread 发布时间:2019-04-29 08:45 字体: [ ]  进入论坛
(单词翻译:双击或拖选)
The universe is expanding faster than it used to, meaning it's about a billion years younger than we thought, a new study by a Nobel Prize winner says.
 
一位诺贝尔获奖者称,宇宙的膨胀速度比以前要快,这意味着它比我们想象中要年轻10亿年。
 
At issue is a number called the Hubble constant, a calculation for how fast the universe is expanding. Some scientists call it the most important number in cosmology, the study of the origin and development of the universe.
 
Using NASA's Hubble Space Telescope, Johns Hopkins University astronomer1 Adam Riess concluded in this week's Astrophysical Journal that the figure is 9% higher than the previous calculation, which was based on studying leftovers2 from the Big Bang.
 
The trouble is, Riess and others think both calculations are correct.
 
Confused? That's OK, so are the experts.
 
They find the conflict so confounding that they are talking about coming up with "new physics," incorporating perhaps some yet-to-be-discovered particle or other cosmic "fudge factors" like dark energy or dark matter.
 
"It's looking more and more like we're going to need something new to explain this," said Riess, who won the 2011 Nobel in physics.
 
NASA astrophysicist John Mather, another Nobel winner, said this leaves two obvious options: "1. We're making mistakes we can't find yet. 2. Nature has something we can't find yet."
 
Even with the discovery, life continues on Earth the way it always has. But to astrophysicists trying to get a handle on our place in this expanding universe, this is a cosmic concern.


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1 astronomer DOEyh     
n.天文学家
参考例句:
  • A new star attracted the notice of the astronomer.新发现的一颗星引起了那位天文学家的注意。
  • He is reputed to have been a good astronomer.他以一个优秀的天文学者闻名于世。
2 leftovers AprzGJ     
n.剩余物,残留物,剩菜
参考例句:
  • He can do miracles with a few kitchen leftovers.他能用厨房里几样剩饭做出一顿美餐。
  • She made supper from leftovers she had thrown together.她用吃剩的食物拼凑成一顿晚饭。
TAG标签: telescope universespace
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