The wispy cloud-like structures discovered in the mid-1980s by the Infrared Astronomical Satellite and believed to be the remains of dust shells blown into space from cool giant or supergiant stars.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。