Weissman P R
Science. 1984 Jun 1;224(4652):987-9. doi: 10.1126/science.224.4652.987.
The Infrared Astronomical Satellite (IRAS) science team has discovered a shell of particulate material around the star Vega. At the mean distance and temperature of the shell, the expected condensation products from a protostellar nebula would be dominated by frozen volatiles, in particular water ice. It is not possible to discriminate between dirty ice and silicate materials in the Vega shell on the basis of the IRAS data. The Vega shell is probably a ring of cometary bodies with an estimated minimum mass of 15 earth masses, analogous to one that has been hypothesized for the solar system. A possible hot inner shell around Vega may be an asteroid-like belt of material a few astronomical units from the star.
红外天文卫星（IRAS）科学团队在织女星周围发现了一层颗粒物质壳。在该物质壳的平均距离和温度条件下，原恒星星云预期的凝聚产物将以冻结的挥发性物质为主，特别是水冰。根据IRAS数据，无法区分织女星物质壳中的脏冰和硅酸盐物质。织女星物质壳可能是一个彗星体环，估计最小质量为15个地球质量，类似于为太阳系所假设的那样。织女星周围可能存在一个炽热的内壳，它可能是一个距离恒星几个天文单位的类似小行星的物质带。
