Ulysses - The first spacecraft to fly over the Sun's poles. Coordinates observations of the interactions between the Sun and Earth. Check the current speed of the solar wind . ACE , the Advanced Composition Explorer, investigates the Heliosphere and Cosmic Rays. Launched in 1998.
Cluster studies the magnetosphere from four points of view.
To be launched in 2004. The next Japanese lead mission to observe the Sun. It will study the interactions of the Sun's corona and magnetic field. To be launched in 2004. For launch in 2007.