质量超过10—20倍太阳质量的恒星，质量下限的选取因研究课题而异，因人而异。
过程核合成可以为大质量星的演化和对流提供有用的约束。
S-process nucleosynthesis may be a useful constraint for the evolution and convection in massive stars.
在星云的正中心有一个脉冲星：一个中子星，它拥有和太阳类似的质量而只有一个小村庄那么大。
In the nebula's very center lies a pulsar: aneutron star as massive as the Sun but with only the size of a smalltown.
星尘的构成是超巨星表面膨胀的大气向宇宙散发的物质，是一颗大质量恒星进化的最后阶段。
The dust is likely formed as the swollen atmosphere of the supergiant sheds material into space, a final phase in the evolution of a massive star.
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