AstroSat has completed 5 years of successful in-orbit operation on 28 September 2020. AstroSat is ISRO’s first Indian multi-wavelength satellite operating as a space Observatory. It is the only satellite which can simultaneously observe in the Far UV and a wide X-ray band from 0.3 to 80 keV using different instruments. This astronomy mission was conceived, following the success of several piggy back astronomy experiments flown earlier on Indian satellites. AstroSat is the result of collaboration between ISRO and several astronomy institutions within India and abroad. There are over 150 refereed publications resulting from data from AstroSat, in addition to Astronomy Telegrams, Circulars and Conference proceedings. This paper provides a brief summary of the evolution of the concept of Astrosat, how it was realized and scientific outcome from this mission.

AstroSat于2020年9月28日成功完成了其在轨运行的5年。AstroSat是ISRO的第一颗印度多波长卫星，是太空观测站。它是唯一可以同时使用不同仪器在0.3到80 keV的远紫外线和X射线波段同时进行观测的卫星。继早些时候在印度卫星上进行的几次piggy带式天文学实验成功之后，便构想出了这项天文学任务。AstroSat是ISRO与印度国内外的一些天文学机构合作的结果。除天文电报，通函和会议记录外，还有来自AstroSat数据的150多种经引用的出版物。本文简要概述了Astrosat概念的演变，