脉冲星是某一恒星群发生爆炸形成超新星后所遗留下来的密核。

Pulsars are the dense cores left over after stars of a certain mass explode into supernovae.

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在2008年八月，v1309发生了最后的裂变，两个星核也终于合二为一，其发光的亮度也随之急剧提升。

V1309's final burst then occurred in August 2008 when the stars' cores finally became one and its brightness increased rapidly.

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就它们与恒星的距离而言，其石质行星核恐怕需要极其长的成型时间，以至于在星核能够俘获气体前周围的气态盘恐怕就已经消散殆尽了。

At their distances from the star, the rocky planetary core would have taken so long to form that the gaseous disk would have dissipated before the core could attract the gas.

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