这颗和我们太阳类似的恒星，已经安然逝去并演变成了一颗密实的白矮星。
The star, which was similar to our sun, had died peacefully and turned into a dense White Dwarf.
由于未能形成新的恒星，这些卫星就演变成了没有别的恒星却单单是那些老恒星们住着的天体退休社区。
Unable to fashion new stars, these satellites evolve into celestial retirement communities, inhabited by bald old stars and little else.
因为在仅仅数百万年之后，疏散星团开始消散，可能因为这个星团异常的年老，其内的一颗恒星已经演变到了行星状星云阶段。
Since open star clusters disperse after only a few hundred million years, this one must be exceptionally old to have one of its member stars evolve to the planetary nebula stage.
因为在仅仅数百万年之后，疏散星团开始消散，可能因为这个星团异常的年老，其内的一颗恒星已经演变到了行星状星云阶段。
Since open star clusters disperse after only a few hundred million years, this one must be exceptionally old to have one of its member stars evolve to the planetary nebula stage.
应用推荐