单词：Aydarkuli
单词：Aydarkuli 相关文章
The Rainy Day The day is cold,and dark,and dreary; It rains,and the wind is never weary; The vine still clings to the moldering wall, But at every gust the dead leaves fall, And the day is dark and dr
世界上最美丽的英文-人生短篇
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）
The first stars in our Milky Way were fearsome high-octane stars, burning their hydrogen fuel at tremendous rates, rushing through their life cycle. They like the rockslides. They live fast and die young. They run out of their fuel very quickly and e
自然百科2011年
But our time traveling isnt yet over. There is still the question of how the first galaxies kindled the very first stars. We are on a journey visiting the Dark Ages, a time over 12.5 billion years ago. The sight is spectacular. The sky is ablaze with
自然百科2011年
What happens is that, first the dark matter forms the structure, the ordinary matter then follows the dark matter. The ordinary matter is hydrogen and helium at this stage. And the hydrogen and helium fall/ to the center of the dark matter halos that
自然百科2011年
We are taking a ride through the Milky Way. First, we are traveling to a place where stars are born. Even at the speed of light, 196,000 miles a second, the journey lasts for 1,500 years. We've arrived at the vast glowing cloud of gas and dust, the g
自然百科2011年