  The Hong Kong/AAO/Strasbourg Halpha (HASH) planetary nebula database is an
online research platform providing free and easy access to the largest and most
comprehensive catalogue of known Galactic planetary nebulae (PNe) and a
repository of observational data (imaging and spectroscopy) for these and
related astronomical objects. The main motivation for creating this system is
resolving some of long standing problems in the field e.g. problems with mimics
and dubious and/or misidentifications, errors in observational data and
consolidation of the widely scattered data-sets. This facility allows
researchers quick and easy access to the archived and new observational data
and creating and sharing of non-redundant PN samples and catalogues.
