Renée C. Kraan-Korteweg , Patrick A. Woudt, PASA, 16 (1), in press.
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Introduction
In the last few years, a lot of progress has been achieved in uncovering the galaxy distribution behind the Milky Way through various multi-wavelength approaches. These sometimes quite tedious tasks are necessary in order to understand the dynamics in the nearby Universe and answer the question whether the perturbations on the smooth Hubble expansion such as the dipole in the Cosmic Microwave Background and other velocity flow fields can be fully explained by the irregular galaxy distribution, respectively mass distribution if galaxies are fair tracers of mass. In section 2, the various observational methods are described and the large-scale structures (LSS) uncovered to date summarised. With respect to HI and near infrared surveys, only their characteristics - advantages, limitations and selection effects - in context to other approaches are discussed as specific surveys and results are presented in detail elsewhere in this volume (cf. Henning et al., Rivers et al., Juraszek et al., and Schröder et al.). In the last section, theoretical predictions applied to the recent deeper sampled galaxy surveys covering volumes out to
kms-1 are reviewed, to see whether they give new indications of unknown or unsuspected prominent structures in the ZOA.
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