In the cases of the major journals of astronomy (Astrophysical Journal, Astronomical Journal, Astronomy and Astrophysics, Publications of the Astronomical Society of the Pacific and the Monthly Notices of the Royal Astronomical Society), coverage is complete, with all issues indexed from number 1 to the present.
Dalam kasus jurnal astronomi teremuka (Astrophysical Journal, Astronomical Journal, Astronomy and Astrophysics, Publications of the Astronomical Society of the Pacific dan Monthly Notices of the Royal Astronomical Society), cakupan lengkap, dengan semua masalah diindeks dari nomor 1 hingga saat ini.