'They recorded the history of the solar system before any of the planets formed, and were the first solids to condense out of the gaseous nebula surrounding our protosun.'
他们记录了行星形成前，太阳系的历史，并且是第一个围绕我们原太阳的固体凝结的气体星云。
Messier 27 (M27) is an excellent example of a gaseous emission nebula created as a sun-like star runs out of nuclear fuel in its core.
Messier 27 (M27)是个气体发射星云的典型例子，它是由于类似太阳的恒星耗尽了其核心的核燃料而产生的。
On the image right, stars, gaseous filaments, and warm dust highlight a detailed infrared view of the Heart nebula.
在照片的右边，恒星、丝状气体和热尘埃突出了心脏星云红外图景的精彩细节。
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