The journal is not necessarily looking for cutting edge research but research of use and of interest not necessarily of moderate to high impact. Anything that is a valid, new and useful contribution to the science of astronomy and related fields is acceptable, however small.
This is not limited to but includes the following:
Preliminary or speculative research (especially where the researcher may not continue to pursue the object of interest).
Unconfirmed but potential discoveries
Actual Discoveries of single objects
Null Results (including warnings of probable null results where research was cancelled due to this.)
Observing Lore that has not been published but usually ‘handed down’
Replication studies of previous research
Useful contributions from non-optimal instrumentation
Heavily data-based contributions (as long as there is a good rationale for it being heavily data, rather than interpretive)
Review articles, small and large, of patches of the sky, patches of the universe, interesting subsets of astronomical objects or discoveries or patches of the scientific literature.
Instrumentation Design and Calibration Studies.
Tutorials for Observing Techniques and Data Analysis
Detailed Information about New Projects, Observatories and Sites
Computational Astronomy and Visualisation
Outlines of Methodology
Open Access. No page charges. No page limits. No Figure Limits. No Reference Limits. This doesn’t mean “unlimited”, it still needs to be concise (dense and to the point) enough and provide enough information to pass peer review.