SSS 2012-05-14
时间：2019-01-08 作者：英语课 分类：Scientific American(五)月
英语课
This is Scientific Americans 60 second Science, I am Cynthia Graber, This will just take a minute.
Scientists are looking for Earth-like planets around other stars. But one way to limit the search can be to figure out where an Earth-like planet cannot exist and eliminate those types of systems.
In a new study, astronomers 1 turned their attention to so-called hot Jupiters. These are Jupiter-sized planets that have an orbit of only about three days. The scientists looked at 63 hot Jupiters to see if they could find evidence for any nearby Earth-like planets. They found none.
But it could be that the companion planets are too small in size or mass or just aren’t detectable 2 with the current techniques. So the researchers then turned to hot Neptunes, and warm Jupiters—these are Jupiters with slightly longer orbits. They found only 2 potential nearby planets among 222 hot Neptures. And of the 31 warm Jupiters, five showed evidence of a companion. The findings are in the Proceedings 3 of the National Academy of Sciences.
The current theory is that hot Jupiters formed and then migrated in towards their stars. The researchers say that the migration 4 might have “disrupted the formation of Earth-like planets.” Good thing our Jupiter kept its cool.
Thanks for the minute for Scientific Americans 60 second Science, I am Cynthia Graber.
n.天文学者，天文学家( astronomer的名词复数 )
- Astronomers can accurately foretell the date,time,and length of future eclipses. 天文学家能精确地预告未来日食月食的日期、时刻和时长。 来自《简明英汉词典》
- Astronomers used to ask why only Saturn has rings. 天文学家们过去一直感到奇怪，为什么只有土星有光环。 来自《简明英汉词典》
adj.可发觉的；可查明的
- The noise is barely detectable by the human ear.人的耳朵几乎是察觉不到这种噪音的。
- The inflection point at this PH is barely detectable.在此PH值下，拐点不易发现。
n.进程，过程，议程；诉讼(程序)；公报
- He was released on bail pending committal proceedings. 他交保获释正在候审。
- to initiate legal proceedings against sb 对某人提起诉讼