说明：这张绚丽的猎户座影像显示了星座内年轻恒星以及由氢气和尘埃组成的宇宙云。
Explanation: This gorgeous image of Orion shows off the constellation's young stars and cosmic clouds of hydrogen gas and dust.
在天蝎座拥挤的星野背景衬托下显出暗色轮廓，这个多尘的宇宙云的形象让人联想起某种不祥的黑塔。
In silhouette against a crowded star field toward the constellation Scorpius, this dusty cosmic cloud evokes for some the image of an ominous dark tower.
巨大的宇宙云的存在，实际上是使二十年代首创的大爆炸论得以保持其宇宙起源论的主导地位所不可缺少的。
The existence of the giant clouds was virtually required for the Big Bang,first put forward in the 1920s,to maintain its reign as the dominant explanation of the cosmos.
巨大的宇宙云的存在，实际上是使二十年代首创的大爆炸论得以保持其宇宙起源论的主导地位所不可缺少的。
The existence of the giant clouds was virtually required for the BigBang, first put forward in the 1920s, to maintain its reign as the dominant explanation of the cosmos.
但更为重要的是，这是科学家们所能观测到的最遥远的过去的景象，因为他们看到的是150亿年前宇宙云的形状和结构。
But even more important, it was the farthest that scientists had been able to look into the past, for what they were seeing were the patterns and structures that existed 15 billion years ago.
但更为重要的是，这是科学家们所能观测到的最遥远的过去的景象，因为他们看到的是150亿年前宇宙云的形状和结构。
But even more important, it was the farthest that scientists had been able to look into the past, for what they were seeing were the patterns and structures that existed 15 billion years ago.
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