The work of IAU Commission 31 members is contained mainly in the reports contributed by members and listed below. Unfortunately because of limitations in space, journal references to the work could not be listed. Readers interested in any of the topics mentioned in the reports are urged to contact those who have submitted that particular report for further information.

During the period from 1984 to 1987 the membership list of Commission 31 was revised to reflect new addresses and telephone numbers. Those listed as members previous to this period who were no longer concerned with Commission matters were deleted from membership. Members were also asked to submit their recommendations for future research in the area of time. The result of this poll was the formation of two working groups.