- 1. 如果核心暴露在外，其热辐射就会加热迸散的气体，使之发光。
- When the core is exposed, its radiation heats the ejected gas, making it glow.
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- 2. 恒星高温的核心坍缩，并开始有规律的振动，最终气体外层迸散，为行星星云的形成提供了有利条件。
- The hot core collapses and begins to pulsate, eventually shedding its outer layers of gas to set the stage for the birth of a planetary nebula.
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- 3. 我们的太阳几十亿年后步入死亡时，也许会也许不会像Kronberger 61那样迸散外壳然后点亮附近的气体。
- Our own sun may or may not puff out and light up like Kronberger 61 when it begins to die some five billion years from now.
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- 4. 我们的太阳几十亿年后步入死亡时，也许会也许不会像Kronberger 61那样迸散外壳然后点亮附近的气体。
- Our own sun may or may not puff out and light up like Kronberger 61 when it begins to die some five billion years from now.
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