Free Astronomy Magazine May-June 2019

52 MAY-JUNE 2019 SPACE CHRONICLES 6752. The aim of their observations was to use these stars to measure the age of the globular cluster, but in the process they made an unex- pected discovery. In the outer fringes of the area ob- served with Hubble’s Advanced Camera for Surveys a compact col- lection of stars was visible. After a careful analysis of their brightnesses by NASA/ESA A new galaxy in the cosmic neighbourhood A n international team of as- tronomers recently used the NASA/ESA Hubble Space Tel- escope to study white dwarf stars within the globular cluster NGC T his image shows a ground-based wide-field view of the region around NGC 6752 from the Digitized Sky Survey 2. [ESA/Digitized Sky Survey 2. Acknowledgement: Davide De Martin]