Gaia Astronomical Data

A CSV file with raw data for 157 masers, 2082 open clusters, 232 HII regions and 86 OB associations that appear on the maps.

Gaia is a space observatory of the European Space Agency, launched in 2013 and expected to operate until 2025. The spacecraft is designed for astrometry: measuring the positions, distances and motions of stars with unprecedented precision.

Source: http://galaxymap.org/drupal/node/265