搜索关注在线英语听力室公众号:tingroom,领取免费英语资料大礼包。
(单词翻译)
This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ?
“We’re on the verge1 of finding out how frequently habitable planets occur in the universe.” That was astronomer2 Alan Boss at the AAAS meeting on February 14th. “And I think we’re going to find out that that number is very close to one.” Meaning that each solar-type star is probably orbited by, on average, one Earth-type planet. So how many habitable planets might be out there?
“10 to the 11th in our galaxy3 and then there are something like 10 to the 11th galaxies4. We’re up to about 10 to the 22 Earths, plus or minus a few.
“You don’t have to just believe that this speculation5 is going to be correct or not. NASA will be launching the Kepler space mission, and Kepler’s entire purpose is to count how many Earths there are around a population of stars in the constellation6 Cygnus.” Kepler launches on March 5th.
“Then about three or four years from now, there’ll be a press conference at NASA headquarters, and Bill Borucki, the Kepler PI will stand up and tell us just how frequently Earths occur. And once we know that we’ll know how to take the next steps in the search for living planets, and some of that work will involve not only telling if the planets are habitable, but actually searching for signatures in their atmospheres if they could be inhabited, as well.”
Thanks for the minute for Scientific American's 60-Second Science. I'm Steve Mirsky .
1 verge | |
n.边,边缘;v.接近,濒临 | |
参考例句: |
|
|
2 astronomer | |
n.天文学家 | |
参考例句: |
|
|
3 galaxy | |
n.星系;银河系;一群(杰出或著名的人物) | |
参考例句: |
|
|
4 galaxies | |
星系( galaxy的名词复数 ); 银河系; 一群(杰出或著名的人物) | |
参考例句: |
|
|
5 speculation | |
n.思索,沉思;猜测;投机 | |
参考例句: |
|
|
6 constellation | |
n.星座n.灿烂的一群 | |
参考例句: |
|
|
本文本内容来源于互联网抓取和网友提交,仅供参考,部分栏目没有内容,如果您有更合适的内容,欢迎 点击提交 分享给大家。