Astronomers at the recently opened ALMA observatory (you can read more about it here) in Chile released this image of a Herbig-Haro object in August, taken during its Early Science phase while the telescopes were still under construction. These phenomena are made from high-speed jets from active stars that pummels into surrounding interstellar gas. ALMA studied Herbig-Haro 46/47 in greater detail than ever before, discovering it was even more energetic than originally thought, and that there are actually two jets, the second one hidden by dust from a newborn star.
Image: ESO/ALMA (ESO/NAOJ/NRAO)/H. Arce. Acknowledgements: Bo Reipurth