... Science User Portal . ... ESO, the European Southern Observatory . ... ESO . ... ESO Supernova . ... Very detailed new observations with ESOтАЩs Very Large Telescope (VLT) of the remains of a thousand-year-old supernova have revealed clues to the origins of cosmic rays. ... Co-author Glenn van de Ven of the Max Planck Institute for Astronomy, concludes: тАЬ This kind of novel observational approach could well be the key to solving the puzzle of how cosmic rays are produced in supernova remnants. тАЭ...