Beyond the cloud's unusual shape, scientists see the nebula as a freeze-frame in the life of a star facing its final act. Elderly stars shed their outer layers in bursts, creating shells of gas and dust that expand. By observing the nebula at different wavelengths, researchers can sort out what material was molted first, how fast the star is losing mass, and which phase of decline Webb has caught.
Continue reading...
，推荐阅读heLLoword翻译官方下载获取更多信息
Jails for NetBSD aims to bring lightweight, kernel-enforced isolation to NetBSD.
The 24-year-old, who lives in Solihull, told BBC Newsbeat that there was "a real taboo" around needing experience to get a job, but only being able to gain experience through a job.