At just 163,000 light years away, the Large Magellanic Cloud is a glittering landmark in the southern sky, among the Milky Way’s closest neighbours and an ideal target for astronomers studying galaxy formation. The European Southern Observatory’s wide-field VISTA telescope has been monitoring the LMC and its smaller sibling, the aptly named Small Magellanic Cloud, for more than a decade, using the telescope’s near-infrared vision to peer through intervening gas and dust to map out stars populating the centre of the galaxy. VISTA – the Visible and Infrared Survey Telescope for Astronomy at ESO’s Paranal Observatory in Chile – is a 4.1-metre (13.45-foot) telescope that is equivalent to a 67-megapixel camera with a 13,000-mm f/3.25 mirror. The camera weighs three tonnes and features 16 infrared detectors. The telescope has allowed astronomers to analyse about 10 million stars in the Large Magellanic Cloud and determine their ages, along with the dwarf galaxy’s three-dimensional structure and faint spiral-like features.
The creation of a specialised IAU Working Group, the Working Group on Star Names (WGSN), was approved by the IAU Executive Committee in May 2016 to formalise star names that have been used colloquially for centuries. WGSN has now established a new catalogue of IAU star names, with the first set of 227 approved names published on the IAU website.
Using data from NASA’s Fermi Gamma-ray Space Telescope and other facilities, an international team has found the first gamma-ray binary in another galaxy and the most luminous one ever seen. The dual-star system, dubbed LMC P3, contains a massive star and a crushed stellar core that interact to produce a cyclic flood of gamma rays.
The Atacama Large Millimetre/submillimetre Array has produced a spectacularly detailed image of a distant galaxy known as SDP.81 that is being gravitationally lensed. The image shows a magnified view of the galaxy’s star-forming regions, the likes of which have never been seen before at this level of detail in a galaxy so remote.