In gravitational microlensing, distant planetary systems may be discovered by utilizing them as naturally occuring lenses. Efforts to find planets by this technique began in the 1990s. The first definitive detection of an extrasolar planet by microlensing was made in 2003 in the event OGLE 2003-BL...
Long beforeclocksand calendars, humans turned to the heavens to measure time and orient themselves on the planet. Ancient people observed cycles related to the motions of Earth, the sun and the moon and used these cycles to determine the length of days, months and years. They also watched th...
In 1961, scientists set up gigantic, sensitive instruments to collect radio waves from the far reaches of space, hoping to discover in them some mathematical pattern indicating that the waves were sent out by other intelligent being. The first attempt failed, but someday the exper...
2.Astronomersbelievetheyhavediscoveredaplanetthatis(两倍 大)oftheearthandcoveredwithdiamonds. 3.(我觉得他对……不满意)yourwork. 4.—IwenttoHawaiiforaholidaythissummer. —Ohreally?(我也是). 5.(一个叫……的狗)Ethelwasheronlycompanion. Ⅳ.话题微写作 根据提示,运用本模块的词汇、短语及...
阅读理解 There was great excitement on the planet of Venus this week.For the first time Venusian scientists managed to land a satellite on the planet Earth, and it has been sending back signals as well as photographs ever since. The satellite was d
planet numbercritical numberdisk gas depletionnonresonant multiple systemsMany extrasolar planetary systems containing multiple super-Earths have been discovered. N-body simulations taking into account standard type-I planetary migration suggest that protoplanets are captured into mean-motion resonant orbits ...
题目 Making electricity out of fossil fuels releases lots of greenhouse gases,which accumulate in the atmosphere and heat up the planet.Nuclear power,on the other hand,has the potential to be an almost unlimited and more climate-friendly energy source.That is because in contrast...
Using a telescope the size of the planet, astronomers have captured the first image of this space oddity. Here's why that matters.
It was when we scheduled the first Dream Incubation for Children in early April that the idea really took hold, when it was discovered that several people had been dreaming not just for but with the children of Iraq. And then people began to talk about how, during childhood illness or ...
a belief to be gathered from any sentence in the Mosaic narrative, but, on the contrary, when we are told that "in the beginning God created the Heaven and the Earth,"— we are told so in reference solely to our own actual planet, and not to any world which may have preceded it. ...