Over the coming weeks we will feature, in no particular order, each of the final 16 selected images and winners will be announced by Royal Museums Greenwich on 17 September. The winning images are to be showcased at the Royal Observatory Greenwich in an exhibition opening 18 September.
A stunning juxtaposition of an ethereal solar system body, long-period comet C/2014 E2 Jacques, and the vast, heart-shaped emission nebula IC 1805, some 7,500 light-years away in the constellation Cassiopeia — winning image of the Planets, Comets & Asteroids category in the Insight Astronomy Photographer of the Year competition 2015.
Astronomers were surprised to find a disc-like structure around a hefty, rapidly aging star nicknamed “Nasty 1,” which has never been seen before around a Wolf-Rayet star in our galaxy. The star may represent a brief transitory stage in the evolution of massive stars.
A research team from the University of Wisconsin has correlated data from three NASA satellites and a ground-based neutrino detector to show that Sagittarius A*, the supermassive black hole at the centre of the Milky Way, is most likely a powerful neutrino generator.