A halo shimmering above a strange cloud of dust and gas in space has left Nasa scientists puzzled. The cloud combination - or nebula - known as Ira's Ghost has been photographed by the Hubble Telescope with scientists wondering what it is that is lighting it up. Read more
A new image of a little-known nebula taken from the Hubble Space Telescope has astronomers wondering what's lighting it up. NASA has released an image of IRAS 05437+2502, or "Ira's Ghost", after it was snapped by Hubble as a "bonus target" - part of a list of things for Hubble to do when it's got spare time. Read more