在这个极限点上，其中心压力将变得如此巨大，以至于爆发失控的核聚变，而恒星则爆炸成为热核爆炸型超新星。
At this point the pressure at its center will become so great that runaway fusion occurs and the star will detonate in a thermonuclear supernova.
这类名为Ia型的超新星爆发由于可以在很远的距离上被观测到，并且亮度遵循可靠的模式，它们被当成测量宇宙膨胀的里程计。
These supernovae, called Type 1a, serve as cosmic mile markers to measure expansion of the universe because they can be seen at large distances, and they follow a reliable pattern of brightness.
大多数科学家认为，当白矮星(年老恒星坍缩而成的残骸)超过质量极限，变得不稳定并爆发的时候，会产生Ia型超新星。
Most scientists agree a Type 1a supernova occurs when a White Dwarf star — a collapsed remnant of an elderly star — exceeds its weight limit, becomes unstable and explodes.
由物质吸积导致的Ia型超新星会在爆发前产生大量的X射线辐射。
A Type 1a supernova caused by accreting material produces significant X-ray emission prior to the explosion.
其他6个星系最近都爆发了Ia型超新星——测量遥远宇宙距离时更可靠的量天尺。
The other six galaxies recently hosted Type ia supernovae that are reliable distance indicators for even farther measurements in the universe.
其他6个星系最近都爆发了Ia型超新星——测量遥远宇宙距离时更可靠的量天尺。
The other six galaxies recently hosted Type ia supernovae that are reliable distance indicators for even farther measurements in the universe.
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