太阳质量恒星

1

这些恒星死亡时坍缩成白矮星。（质量大于8个太阳质量的恒星会成为中子星；大于30个太阳质量的恒星成为黑洞。）这两个星云都有高电离度和高激发度，说明其内部的恒星非常热。

these progenitors collapsed into white dwarfs when they died . ( Stars more massive than eight solar masses become neutron stars ; and stars greater than 30 solar masses become black holes . ) And both have high ionisation and excitation , indicating the stars inside them are very hot .
2

1.2太阳质量的模型恒星在赫-罗图上的演化程

The evolutionary track in the H-R diagram of model stars of 1.2 solar mass
3

跟我们太阳一样的质量较小恒星原则上能以完全不同的方式，抛掉他们的剩余角动量。

Less massive stars such as our sun , can in principle shake off their excess angular momentum in a rather distinctive fashion .