Published on Monday, 01 April 2013 00:00
M42, the Orion Nebula. (NASA/JPL-Caltech/WISE Team)
The Orion Nebula (Messier 42) in infrared from NASA’s Wide-field Infrared Survey Explorer satellite. Hot stars appear blue, while cooler objects such as dust, appear green and red. The clump of young stars at the centre of the cloud are heating the hottest, white, dust. This view is 100 light-years across, spanning about six times the width of the full Moon on the sky.