请你把中文翻译成为英文
在1930年代，当天文学家开始猜测恒星在核燃料燃尽后其未来是什么的时候，他们发现很难去描述这种状态。
In the 1930s, as astronomers began to ponder the future of a star whose nuclear fuel had run out, they ran into difficulty describing its fate.