Designed to bring substantial, extensive support to the material found in the Journal, the Supplement Series contains many of the most frequently cited papers in astronomical literature.

Stellar Astrophysics contains a selection of high-quality papers that illustrate the progress made in research into the structure and evolution of stars.

"Letters to the Editor" issued as Part 2 and separately paged from v. 148, 1967. Beginning in 2009, the Letters published only online.

This is a useful reference for students and researchers working in the field of extragalactic astrophysics and studying star-formation in local and higher-redshift galaxies.