The double helix nebula. Image credit: NASA/UCLA Click to enlarge Astronomers have discovered an unusual helix-shaped nebula near the centre of the Milky Way. This peculiar nebula stretches 80 light years, and looks like the classic image of a DNA molecule. The nebula formed because it’s so close to the supermassive black hole at the … Continue reading "Strange Helix-Shaped Nebula Discovered"