Magnetic sail significant in the long term. In typical magnetic sail designs, the magnetic field is generated by a loop of superconducting wire. Because loops of current-carrying conductors tend to be forced outwards towards a circular shape by their own magnetic field, the sail could be deployed simply by unspooling the conductor and applying a current through it. The solar wind is a continuous stream of plasma that flows outwards from the Sun: near the Earth's orbit, it contains several million protons and electrons per cubic meter and flows at . The magnetic sail introduces a magnetic field into this plasma flow
Sun Stream not compete again. In their book, "A Century of Champions", based on the Timeform rating system, John Randall and Tony Morris rated Sun Stream a "superior" winner of the 1000 Guineas and Oaks and the twenty-fifth best filly trained in Britain or Ireland in the 20th century. Sun Stream retired from racing to become a broodmare at her owner's stud. She produced four minor winners, but nothing of top class. Through her daughter Riviera, she was the female ancestor of the Champion Hurdler Collier Bay. Sun Stream was euthanised in January 1959. Sun Stream Sun Stream (1942 – January 1959)