These images show how comet C/2014 UN271's nucleus was isolated from a shell of dust and gas (a coma) surrounding the solid nucleus. At left is a photo of the comet taken by the Hubble telescope on Jan. 8. A model of the coma (middle) was obtained by fitting the surface brightness profile assembled from the left image. This permitted the coma to be subtracted, revealing the nucleus's pointy glow. (Macau University of Science and Technology)
