... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... ESO . ... Survey Telescopes . ... Star Clusters . Stars . ... Stars@ESO . ... ESO Science Newsletter . ... These are all regions of star formation that contain many hot young stars including several bright stars of spectral type O. The O stars in these star-forming regions that were included in a new survey using ESOтАЩs Very Large Telescope are marked with circles. ...