Knots in the gas ring around supernova 1987A brighten in images made with the Hubble Space Telescope in February 1998, January 1999 and February 2000.

P. Challis and R. Kirshner (Harvard-Smithsonian Center for Astrophysics), P. Garnavich (University of Notre Dame) and Z. Levay (STScI)

Publication: February 16, 2000