标签：astronomer 相关文章
By David McAlary Washington 30 November 2006 An ancient piece of Greek technology recovered from a shipwreck more than 100 years ago is amazing scientists who have analyzed it in detail. Fragments of bronze gearwheels, now green and crumbling from m
2006年VOA标准英语（十一月)
AS IT IS 2014-02-23 World Digital Library Reaches 9,900 Items 世界数字图书馆达9900项 Hello and welcome to As It Is, from VOA Learning English! Im Steve Ember in Washington. The American space agency NASA launched its first Voyager spacecraft
2014年VOA慢速英语(三)月
Back in the 1950s few women in the United States worked outside of the home, and even fewer earned doctorate degrees or went on to have professional careers. 回顾1950年代的美国，当时的女性很少在外工作的。而获得博士学位或者
VOA双语新闻 2011年9月
Is There Life on Mars? For most of the 20th century, there has been life on Mars. Or, at least in the minds of the Earthlings, who inhabit its closest planetary neighbor. When at the end of the 19th century, the American astronomer Percival Lowell th
英语流行话题阅读：语境识词4500
By David McAlary Washington 10 January 2006 Before you continue thinking about our Milky Way galaxy as a peaceful, spiral disk of stars slowly rotating through the heavens, consider this: It is hungri
2006年VOA标准英语（一月）
By David McAlary Washington 22 February 2007 As populations and cities grow, our once pristine view of the stars is being whitewashed by urban glow. Astronomers, whose view of the heavens is being dimmed, are complaining, but biologists are also decr
2007年VOA标准英语（二月）
By David McAlary Was 16 August 2006 Artist's rendition of solar system There may soon be three new planets in our solar system. The expansion would be the result of a proposed new definition of what a planet is. The change is controversial, but if a
2006年VOA标准英语（八月）
Hubble's Gaze Extends to Edges of Universe Ever since the days of Galileo and the first optical telescopes more than 400 years ago, astronomers have been looking for ways to cast their gaze farther into the heavens around us. Today, thanks to the ear
VOA标准英语2011年(八月)
Its a stunning location, but its also mysterious. These stars are not just close together. They are on the move at enormous speeds. Going to the heart of a galaxy might not be the similar to going to an amusement park. The rides are some similar to h
自然百科2011年
By Chris Simkins Washington, DC 19 January 2006 watch Pluto Mission report The U.S. space agency NASA delayed the launch Wednesday of a rocket carrying a probe that will study the planet Pluto and its
2006年VOA标准英语（一月）
By David McAlary Washington 05 April 2006 New evidence from an orbiting U.S. telescope indicates that planets might rise up out of a dead star's ashes. This is the first time scientists have detected
2006年VOA标准英语（四月）