Revealing the Two `Horns' of Taurus with GAIA DR2
  We investigate the spatial properties of sources from the GAIA catalogue
previously identified as being members of the Taurus star forming region and
which appear in the Spitzer catalogue. We study an area of sky of 10x15 deg,
centred on Right Ascension (2000.0) = 68.5 deg and Declination (2000.0)= 27.0
deg, this being an area surrounding the Taurus molecular cloud. We use data
obtained from the GAIA DR2 release. By using an inversion of GAIA parallax
measurements to obtain distance values and by defining limits to the proper
motions of the Taurus moving group, we are able to show that there are
substantial differences in depth within the Taurus complex. Our results suggest
that the Taurus cloud has significant depth and that there are two main
associations centred at ~130.6+/-0.7 pc and ~160.2+/-0.9 pc at 1{\sigma}. These
two associations also have different proper motions, of 24.5+/-2.8 and
20.1+/-2.4 mas/yr respectively. We here label them the 'Two Horns' of Taurus.
