Exactly, I remember that Hubble used the GSC catalog and it was the first cd rom that I had at the time: https://en.m.wikipedia.org/wiki/Guide_Star_Catalog http

Exactly, I remember that Hubble used the GSC catalog and it was the first cd rom that I had at the time: https://en.m.wikipedia.org/wiki/Guide_Star_Catalog https://en.m.wikipedia.org/wiki/Guide_Star_Catalog