a) Chance discovery reveals star factories in the distant Universe This zoom on the location of the distant galaxy SMM J2135-0102 reveals how it was first discovered by astronomers observing a massive galaxy cluster using submillimetre wavelengths of light, with the Atacama Pathfinder Experiment (APEX) telescope. After zooming to the location of the galaxy cluster the position of SMM J2135-0102, as discovered by APEXâs LABOCA camera, is shown in red. A further zoom shows how follow-up observations with the Submillimeter Array (also in red) revealed the clouds where stars are forming in the galaxy with great precision. Our view of the galaxy is magnified by gravitational lensing, which also produces a doubling of the image; the apparent eight regions in the Submillimeter Array observations actually represent four distinct regions of star formation in the galaxy. Credit: ESO/APEX/M. Swinbank et al.; DSS2, NASA/ESA Hubble Space Telescope & SMA b) Progressively higher resolution: from APEX to SMA This movie shows what happens as we go to progressively higher resolution from the APEX discovery of the galaxy to the highest possible resolution with the SMA. The background image is the HST image of the cluster MACSJ2135-0102. The red overlay shows that at progresssively higher resolution, the image breaks up into a series of star-forming knots, easch of which is only ~100 parsecs in the source plane. Credit: M. Swinbank et al., NASA/ESA Hubble Space Telescope, ESO & SMA