... ESO . ... The new SPHERE instrument on ESOтАЩs Very Large Telescope has been used to search for a brown dwarf expected to be orbiting the unusual double star V471 Tauri. ... A team of astronomers led by Adam Hardy (Universidad Valpara†нso, Valpara†нso, Chile) first used the ULTRACAM system on ESOтАЩs New Technology Telescope to measure these brightness changes very precisely. ... This is how science works: observations with new technology can either confirm, or as in this case disprove, earlier...