... Science User Portal . ... ESO, the European Southern Observatory . ... Travel to APEX/Sequitor . ... Survey Telescopes . ... Galaxies . ... Astronomers have used the APEX telescope to probe a huge galaxy cluster that is forming in the early Universe and revealed that much of the star formation taking place is not only hidden by dust, but also occurring in unexpected places. ... These galaxies are in the process of formation so, rather like a construction site on Earth, they are very dusty .тАЭ . ...